INSTALLATION MANUAL MODEL 3325B SYNTHESIZER/FUNCTION GENERATOR Serial Number: ALL IMPORTANT NOTICE This manual applies to all instruments.Documentation changes required after the printing of this manual are shown on a manual change supplement which accompanies this manual. WARNING To prevent potential fire or shock hazard, do not expose instrument to rain or moisture. Manual Part No. 03325-90006 Microfiche Part No. 03325-90206 ©Copyright Hewlett-Packard Company 1978, 1981, 1984, 1988 8600 Soper Hill Road Everett, Washington 98205-1298 U.S.A. Printed: January 1988TA eackano CERTIFICATION Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Bureau of Standards, to the extent allowed by the Bureau's calibration facility, and the calibration facilities of other International Standards Organization Members. WARRANTY ‘This Hewlett-Packard product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by -hp-. Buyer shall prepay shipping charges to -hp- and -hp- shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to -hp- from another country. HP software and firmware produets which are designated by HP for use with a hardware product, when properly installed on the hardware produet, are warranted not to fail to execute their programing instructions due to defects in materials and workmanship. If HP receives notice of such defects during their warranty period, HP shall repair or replace software media and firmware which do not execute their programming instructions due to such defects. HP does not warrant that the operation of the software, firmware or hardware shall be uninterrupted or error free. LIMITATION OF WARRANTY ‘The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance. NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR, PARTICULAR PURPOSE. EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES. HEWLETT-PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY. ASSISTANCE Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard products. For any assistance, contact your nearest Hewlett-Packard Sales and Service Office. Addresses are provided at the back of ihis manual.SAFETY SUMMARY ‘The following general safety precautions must be observed during all phases of operation, service, and repair of this instrament. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Hewlett-Packard Company assumes no liability for the customer's failure to comply with these requirements. This is a Safety Class 1 instrument. GROUND THE INSTRUMENT ‘To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground. The instrument is equipped with a three-conductor ae power cable. The power cable must either be plugged into an approved three-contact electrical outlet or used with a three-contact to two-contact adapter with the grounding wire (green) firmly connected to an electrical ground (safety ground) at the power outlet. The power jack and mating plug of the power cable meet International Electrotechnical Commission (IEC) safety standards. DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrament in such an environment constitutes a definite safety hazard. KEEP AWAY FROM LIVE CIRCUITS. Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made by qualified maintenance personnel. Do not replace components with power cable connected. Under certain conditions, dangerous voltages may exist even with the power cable removed. To avoid injuries, always disconnect power and discharge circuits before touching them, DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present. DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the instrument. Return the instrument to a Hewlett-Packard Sales and Service Office for service and repair to ensure the safety features are maintained. DANGEROUS PROCEDURE WARNINGS Warnings, such as the example below, precede potentially dangerous procedures throughout this manual. Instructions contained in the warnings must be followed. WARNING Dangerous voltages, capable of causing death, are present in this instrument. Use extreme caution when handling, testing, and adjusting.SAFETY SYMBOLS General Definitions of Safety Symbols Used On Equipment or In Manuals. A Instruction manual symbol: the product will be marked with this, symbol when it is necessary for the user to refer to the instruction manual in order to protect against damage to the instrument. Indicates dangerous voltage (terminals fed from the interior by voltage exceeding 1000 volts must be so marked.) Protective conductor terminal. For protection against electrical shock in case of a fault. Used with field wiring terminals to indicate the terminal which must be connected to ground before operating equipment. Low-noise or noiseless, clean ground (earth) terminal. Used for a signal common, as well as providing protection against electrical shock in case of a fault. A terminal marked with this symbol must be connected to ground in the manner described in the installation (operating) manual, and before operating the ‘equipment. Frame or chassis terminal. A connection to the frame (chassis) of the equipment which normally includes all exposed metal structures. Alternating current (power ine.) Direct (power line.) Alternating or direct current (power line.) WARNING The WARNING sign denotes a hazard. Itcalls attention to a procedure, practice, condition or the like, which if not correctly performed or adhered fo, could result in injury or death to personnel. CAUTION The CAUTION sign denotes a hazard. It calls attention to an operating procedure, practice, condition or the like, which, itnot correctly performed or adhered to, could result in damage to or destruction of part or all of the product. ‘The NOTE sign denotes important information, it calls attention to procedure, practice, condition or the like, which is essential to highlight.HP 33258 Installation General Installation Information Initial Inspection Power Requirements ........cceee00 Line Voltage Selection . Over-Voltage Protect Circut Breaker Power Cable and Grounding . Requirements Operating Environment Temperature ores seceerene Humiclty eae tess Altitude Instrument Cooling . Instattation HPAB System Interface Connections |. ‘Storage And Shipment ...... Operational Verification Required Test Equipment Soff Test Sine Wave Veriiction ‘Square Wave Verification Triangle and Ramp Verification Amplitude Flatness Chack Sync Output Check Frequency Accuracy . Culput Level and Attenuator Check | Harmonic Distortion Table of Contents wi 46 we 46 148 46 we 6 46 48 2410 ant ceed 2442 412 413 414 415 AIS 416 416 447 Close-tn Spurious Signal Performance Tests ; Required Test Equipment ....., Harmonic Distortion Spurious Signal . Integrated Phase Noise Amplitude Modulation Envelope Distortion Square Wave Riso Time . and Aberrations Ramp Retrace Time... 6... ‘Syne Output . . ae ‘Square Wave Symmetry ... Frequency Accuracy Phase Increment Accuracy Phase Modulation Linearity ‘Amplitude Accuracy DC Offset Acouracy (BC Oniy) DC Offset Accuracy with AC Funetions Triangle Linearity... see X Drive Linearity oe. Ramp Period Variation ... Operational Verification Record Performance Test Record Specifications (Appendix A) Index 419 4.20 420 423 425 427 428 . 429 4-30 430 43 4.02 4.33 434 4.38 4-05 446 447 450Chapter4 HP 3325B Installation ‘This section contains instructions for installing and interfacing the HP 3325B Synthesizer/Function Generator as well as tests to verify performance. Included are initial inspection procedures, power and grounding requirements, operating environment, available acessories and options, installation instructions, interfacing procedures, and instructions for repacking and shipping. ‘There are two sets of tests: the first, operational verification, is a subset of the second, performance tests, an exhaustive test of the HP 3325B specifications. The operational verification is typically used as an incoming inspection tool upon initial receipt. The performance tests are used just before shipping from the factory, after any service work, and when a full calibration is performed. 44General Installation Information Initial Inspection ‘The HP 3825B was carofully inspected both mechanically and electrically before shipment. It should be free of mars or scratches and in perfect olecirical order upon receipt. To assure that this is the case, perform the following steps: + Inspect the HP 3325B for physical damage incurred in transit. If the HP 3325B was damaged in transit, file a claim with the carrier. Warning The Integrity of the protective earth ground may be interrupted if the HP 3325B is mechanically damaged. Under no circumstances should the HP 3325B be connected to power if itis damaged. + Check for supplied accessories (listed in Chapter 3 of the Operating Manual). Inspection will be completed after testing the electrical performance using the Operational Verification tests which appear later in this document. Also included in this document is the Performance Test. This is a very detailed test procedure designed to verify that the HP 3325B meets all the performance specifications. Power Requirements Caution _Be’ore applying ac line power to the HP 3325B, ensure the voltage selector on the HP 33258 rear panel is set for the proper line voltage and the correct line fuse is installed in the fuse holder. Procedures for changing the line voltage selector and fuse are contained in the following section for “Line Voltage Selection.” ‘The HP 33255 can operate from any single phase ac power source supplying 100V, 120V, 220V or 240V in the frequency range from 47 to 66 Hz (see table 4-1). With all options stalled, power consumption is less than 100 VA. Table 4-1. Line Voltage Ranges Selector ‘AC Voltage Voltage Range 100 90-108 120 108-126 220 198-231 240 216-252V 42General Installation Information Line Voltage Selection ‘The line voltage selector is set at the factory to correspond to the most commonly used line voltage of the country of destination. The line voltage selected for the HP 3325B is indicated on the line voltage selector (refer to figure 4-1). Refer to table 4-1 for the line voltage ranges and table 4-2 to set the line voltage and seleet the appropriate fuse. To change the line voltage and fuse: Remove the power cord. 2. Pry open the power selector cover on the rear panel with a small screwdriver (sce figure 4-1), 3. To cheek or replace the fuso, pull tho white fuse holder out of the power selector and remove the fuse from the fuse holder. 4, ‘To reinstall the fuse, insert a fuse with the proper rating into the fuse holder. ‘The white arrow on the fuse holder handle should point toward the top of the instrument. Push the fuse holder into the power selector. 5. Tochange the line voltage, remove the cylindrical line voltage selector. Caution Remove line voltage selector to change voltage. Rotating the selector without removing the cylinder could damage the module. 6. Reinstall the cylindrical line voltage selector and ensure the required voltage label is facing out of the power selector. The eylinder is keyed so that it ean not be installed backwards, 7. Close the power selector by pushing the side catches in (toward the center of the cover) and then pressing down firmly on the cover. 8. Check that the correct line voltage appears through the window in the power selector cover, Table 4-2. Line Voltage and Fuse Selection Line Setting Fuse Type | HP Part Number s00v/120 1A 250V Quick-Acting F) 2110-0782 220v/240V 500 mA 250V Quick-Acting (F) | 2110-0733 Over-Voltage Protect Circuit Breaker In addition to the current protection provided by the line fuse, the HP 3925B is protected by an over-voltage circuit breaker. This device disconnects the power supply from the main power connector when the line voltage exeeeds the upper limit. The reset switch, located on the rear panel (figure 4-1), pops out when this occurs. If this occurs: 1, ‘Turn the power switch to STANDBY (6) and disconnect the power cord. 2. Check the setting of the line-voltage selector, as described earlier in this chapter, to be sure that it matches the power connected to the HP 8325B, 43General Installation information |p gee ae Figure 4-1. Line Voltage Selection, Fuse Replacement, and Circuit Breaker 3. Reset the circuit breaker by pushing the reset switch on the rear panel. 4, Reconnect the power cord and turn the power switch on, If the circuit breaker pops out when power is restored and the line voltage level is within the limits described in table 4-1, send the HP 3325B to a qualified service facility for repair. Warning Line voltages should be measured by a qualified service person who Is aware of the hazards involved. Ifthe circuit breaker does not open and the HP 3325B does not operate, remove power and check line fuse. Power Cable and Grounding Requirements ‘The HP 33258 is equipped with a three-conductor power cord which, when plugged into an appropriate receptacle, grounds the HP 3325B cabinet. The type of power cable plug shipped with each instrument doponds on the country of destination. Refer to figure 4-2 for the part number of the power cable and plug configurations available. 44General installation Information — eff i sso0- | a cours swsonser ofS] — | couesomsen BEL On eg . Sipe te tag * a sais Eee aa Newtra | “Se Epp genie as Plus: ceer-viy 2e0v 64 zeov- ea | (GreLe™ S081 S808 OPERATION CABLE: Sost.sera OPERATION prion 903 ves.scanasa cpticn #17 eapunnic of fovtn ae cere tester oe Pe re aiay eee See eee rude (at eee ye [aaa aes a SE a AA a ae Sta aa | oroies ssins EAS | | cours Bh “The nuinber shown forthe pf the industry icetitier for the plug only The number shown for the cable san H1P part amber for a complete cable including the plug “UL listed for use in the United States of America Figure 4-2. Power Cables WARNING The power cable plug must be inserted into a socket outlet provided with a protective earth terminal. Defeating the protection of the grounded instrument cabinet can subject the operator to lethal voltages. 45General Installation Information Operating Environment ‘The following summarizes the HP 3325B operating environment ranges. In order for the HP 83258 to mect specifications, the operating environment must be within these limits, Warning ‘The HP 9325B is not designed for outdoor use. To prevent potential fire or ‘shock hazard, do not expose the HP 33258 to rain or other excessive moisture. ‘Temperature ‘The HP 3325B may be operated in temperatures from 0°C to 55°C. Humidity ‘The HP 3325B may be operated in environments with humidity up to 95% (0°C to +40°C), However, the HP 3325B should be protected from temperatures or temperature changes which cause condensation within the instrument. Altitude ‘The HP 3325B may be operated at altitudes up to 4572 meters (15,000 feet). Instrument Cooling ‘The HP 3325B is equipped with a cooling fan mounted on the rear panel. ‘The HP 3325B should be mounted so that air can freely circulate through it. When operating the HP 3325B, choose a location that provides at least 75 mm (3 inches) of clearance at the rear, and at least 25 mm (1 inch) of clearance at each side. Failure to provide adequate air clearance will result in excessive internal temperature, reducing instrument reliability. The filter for the cooling fan can be cleaned without removing it. The filter (HP part number 3150-0387) should be cleaned with a vacuum cleaner every thirty days. Installation ‘The HP 8325B is shipped with plastic feet in place, ready for use as a portable bench instrument. The plastie fect are shaped to make full width modular instruments self-align when they are stacked. The clearances provided by the plastic feet in bench stacking and the filler strip in rack mounting allow air passage across the top and bottom cabinet surfaces. A front handle kit can be installed for ease of handling the HP 3325B on the bench. The part number for the front handle kit is listed in table 3-3 of the HP 3325B Operating Manual, 46General Installation Information RACK MOUNT FLANGE KIT a RACK MOUNT FLANGE/ERONT HANDLE KIT Figure 4-3, Rack Mount and Handle Kits. Option 908 (rack mount flange kit) and 909 (rack mount flange kit with handles) enable the HP 33258 to be mounted in an equipment cabinet. The rack mount for the HP 3325B is EIA standard width of 482.6 mm (19 inches). To install the HP 3325B in an equipment cabinet: If installed, remove the plastic trim (seo figure 4-3) and front handles from the HP 33258. + Remove the plastic fect from the bottom of the HP 83253. Install the rack flange kit with or without handles according to instructions included with the kit. (Kit part numbers are listed in figure 3-3 of the HP 3325B. Operation Manual.) Note “The rack mount flange kit of Option 908 will not provide the space requirement for rack mounting when used withthe front handle kit of Option 907. If front handles are not available, use the combination kit of Option 909 to rack mount with handles. If Option 907 front handles are available, use Rack Mount Flange Kit, HP part number 5061-2072 to add rack mounting. + Install an instrument support rail on each side of the instrument cabinet. (The instrament support rails, used to support the weight of the instrument, are included with HP instrument cabinets.) * Lift the HP 3325B to its position in the cabinet on top of the instrument support rails. * Using the appropriate screws, fasten the HP 3325B rack mount flanges to the front of the instrument cabinet. 47General Installation Information ep Piggybeck Connectors Figure 4-4, Typical HP-IB System Interconnection HP-IB System Interface Connections ‘The HP 93258 instrument is compatible with the Hewlett-Packard Interface Bus (HP-IB). ‘The HP-IB is Howlett-Packard’s implementation of IEEE Standard 4881978 and ANSI Standard MC 1.1. The HP 3325B is connected to the HP-IB by connecting an HP-IB interface cable to the connector located on the rear panel. Figure 4-4 illustrates a typical HP-IB system interconnection. With the HP-IB system, up to 15 HP-IB compatible instruments can be interconnected. The HP 10833 HP-IB cables have identical piggy-back connectors on each end so that several cables can be connected to a single source without special adapters or switch boxes. System components and devices can be connected in virtually any configuration, There must, of course, be a path from the controller to every device operating on the bus. As a practical matter, avoid stacking more than three or four cables on any one connector. If the stack gets too long, any force on the stack can damage the connector mounting. Be sure that each connector is firmly screwed in place to keep it from working loose during use. The HP 3325B uses all the available HP-IB lines, therefore, any damaged connector pins may adversely affect HP-IB operation. Refer to figure 4-5 for a description of the HP-IB connector, 48General installation Information he 33258 consin mai threaded HPD ceble mounting stds as Ieee Sree rere meee i = iri eine incorrect He Sciortino naa erste ieee |e | Sees 7B, | See ghee i |e ear | Bes ccvse cme fewer come | | | Reamer Urea, me (68) | 2 | eee ur Figure 4-5. HP-IB Connector Information ‘To achieve design performance with the HP-IB, proper voltage levels and timing relationships must be maintained. If the system cable is too long, the lines cannot be driven properly and the system will fail to perform (aee figure 4-5 for HP-IB cable lengths). ‘Therefore, when interconnecting an HP-IB system, it is important to observe the following rule: ‘Total cable length for the system must be less than or equal to 20 meters (65 feet) or 2 meters (6 feet) times the total number of devices connected to the bus, whichever is less, 49General Installation Information Storage And Shipment ‘The HP 3325B should be stored in a clean, dry environment. The following are environmental limitations that apply to both storage and shipment: Temperature + 40°C to +75°C Humidity Up to 95% Altitude Up to 15,300 maters (50,000 feet) ‘The HP 33258 should also be protected from temperatures or temperature changes which cause condensation within the instrument. Containers and materials identical to those used in factory packaging are available through Hewlett-Packard offices. If the instrument is being returned to Hewlett-Packard for service, attach a tag indicating the type of service required, return address, model number, and full serial number. Also, mark the container FRAGILE to ensure carefull handling. In any correspondence, refer to the instrument by model number and fall serial number. ‘The following general instructions should be used for repacking with commercially available materials: ‘+ Wrap the instrument in heavy paper or anti-static plastic. If shipping to a Hewlett-Packard office or service center, attach a tag to the instrument indicating type of service required, return address, model number, and full serial number, + Use a strong shipping container. A double-wall carton made of 350-pound test material is adequate. + Use a layer of shock absorbing material 70 to 100 mm (3 to 4 inch) thick around all sides of the HP 3325B to provide firm cushioning and prevent movement inside of the container. Protect the contro! panel with cardboard. Caution Styrene pellets in any shape should not be used as packing material. The pellets do not adequately cushion the instrument and do not prevent the instrument from shitting in the carton. The pellets also create static electricity which can damage electronic ‘components, + Seal shipping container securely. + Mark shipping container FRAGILE to ensure careful handling, + In any correspondence, refer to the instrument by model number and full serial number. 4-10Operational Verification ‘The following procedures are recommended for incoming inspection and for testing the instrument after repair. Additional tests to be performed following repair of eertain circuits are indicated in Section VIII of the HP 3325B Service Manual. An Operational Verification Record is located at the end of this section. For ease of recording the test data at various times, copies of the blank Operational Verification Record may be made without written permission from Hewlett-Packard. Operational Verification includes the following procedures: Self Test Sine Wave Vertication ‘Square Wave Verification Triangle and Ramp Verification Amplitude Flatness Check ‘Sync Output Check Frequency Accuracy Output Level and Attenuator Check Harmonic Distortion Close-in Spurious Signal Required Test Equipment ‘The test equipment required for Operational Verification is listed in table 4-3, Any equipment that satisfies the critical specifications given in the table may be substituted for the recommended model. Table 4-3, Test Equipment Required for Operational Verification Instrument Critical Specifications Recommended Model Analog Vertical: HP 1740A/TEK 2245 Oscilloscope Bandwidth: de to 100 MHz Defiection: 0.01 to 5 V/div | Horizontal: Sweep: 0.05 ps to 0.5 s/civ | x 10 Magnification | Delayed Swoop | Electronic Counter Frequency measurement to 20 MHz | HP 5328A, | Accuracy: + 2 counts with Opt. 010,040, and Resolution: 8 digits (041/53288 with Opt. 010 DC Digital Voltmeter Ranges: 0.1 to 100V HP 3455434784 | Resolution: 5 1/2 digits I Accuracy: * 0.1% ant‘Operational Verification Table 4-3. Test Equipment Required for Operational Verification (Cont'd) Instrument Critical Specifications Recommended mode! 500 Feedthru ‘Accuracy: 0.2% HP 11048C. Termination | Power Rating: 1W High Frequency | Frequency Range: 1 to 80 MHz HP 1417/85528/85598/ Spectrum Analyzer | Amplitude Accuracy: + 0.5 oB 8565A/8568A | Noise: >70 dB below reference i Low Frequency Frequency Range: 100 Hz to 50 kHz_| HP 358095854 ‘Spectrum Analyzer Amplitude Range: 2 mV to 20V Noise: >80 0B below input || reference or 140 d8v | | | Resistor | 4700 aw s% HP 0698-3604 Resistor 56.20 1/8W 1.0% HP 0757-0395 | adapter BNC female-to-dual banana plug _| HP 1251-2277 Self Test ‘This test uses the control, ROM, and control clock cireuits to verify operation of these and other circuits, The following front panel indications result from this test. LED check: Turns on all LEDs for about two seconds. ‘The following messages are displayed for about one second: PASS 0 or FAIL 02n - tests Amptd Cal of de offset. PASS 1 or FAIL 02n - tests Amptd Cal of sine wave. PASS 2 or FAIL 02n — tests Amptd Cal of square wave. PASS 3 or FAIL 02n ~ tests Ampta Cal of triangle wave, (nis a number from 0 to 9) Press the blue [Shift] key, then press the [Amptd Cal] key. All LEDs should light, and the display should not indicate any failures. Sine Wave Verification ‘This procedure visually checks the sine wave output for the correct frequency and any visible irregularities. Equipment Required: Analog Oscilloscope a, Connect the HP 3325B signal output to the oscilloscope vertical input. Set the input switch to the 500 position. If your oscilloscope does not have a 500 input, use a 500 feedthru termination at the input. 412L Operational Verification Set the HP 3325B as follows: High Votage Output (option 002) off Funetion Sine Frequency 20 MHz. “Amplitude 10Vpp Set the oscilloscope vertical control to 2 Vidiy, horizontal to 0.05 ys/div, ‘The oscilloscope should display one cycle per division, approximately five divisions peak-to-peak. Change the HP 33258 frequeney to 1 MHz, Change oscilloscope horizontal control to 0.1 us/div. ‘The oscilloscope should display one sine wave having no visible irregularities, High Voltage Output (option 002) Sot the oscilloscope vertical control to 5 Vidiv. Set the oscilloscope input switch to 1 MQ de coupled position (or disconnect external 500 feedthru termination). Select the high voltage output on the HP 3325B. A LED near the key indicates that the high voltage output is on. Change the amplitude to 40 Vpp. The oscilloscope should display one sine wave approximately eight divisions peak-to-peak having no visible irregularities, ‘Turn off the high voltage output. Square Wave Verification ‘This procedure checks the square wave output for frequency, rise time, and aberrations, Equipment Required: Analog Oscilloscope a Connect the HP 3325B signal output to the oscilloscope vertical input. Set the input switch to the 50 position. If your oscilloscope does not have a 500 input, use a 500 feedthru termination at the input. Set the HP 93258 as follows: High Voltage Output (option 002) on Function Square Frequency 1 MHz Amplitude 10 Vpp, Set the oscilloscope vertical control to 2 Vidiv, horizontal to 0.2 ys/div. The oscilloscope should display two square waves, approximately five divisions peak-to-peak. 413Operational Verification Switch the oscilloscope vertical control to 1 Vidiv, so that the aberrations (overshoot and ringing) can be measured. Aberration excursion should be less, than 500 mV (1/2 div). Repeat step d at 2 kHz and 0.1 ms/div. Adjust the oscilloscope vertical and horizontal controls so that the square wave rise time between the 10% and 90% points can be measured. Rise time should be less than 20 ns. Triangle and Ramp Verification ‘This procedure checks the triangle and ramp output signals for frequency, shape, and ramp retrace time. ang Equipment Required: Analog Oscilloscope a. & Connect the HP 3325B signal output to the oscilloscope vertical input. Set the input switch to the 502 position, If your oscilloscope does not have a 500 input, use a 500 feedthru termination at the input. Set the HP 3325B as follows: High Voltage Output (option 002) oft Function Tangle Frequency 40 kHz Amplitude 10Vpp Set the oscilloscope vertical control to 2 Vidiv, horizontal to 0.1 ms/div. The oscilloscope should display one triangle wave per division, approximately five divisions peak-to-peak. Change the HP 3325B function to positive slope ramp. ‘The display should be one ramp per division, approximately five divisions peak-to-peak. Change the function to negative slope ramp. The display should be one ramp per division, approximately five divisions peak-to-peak. Change the oscilloscope horizontal and vertical controls so that the ramp retrace time from the 90% to 10% points can be measured, Retrace time should be less than 8 ys. Change the HP 3325B funetion to positive slope ramp and repeat stop £ Change the function to triangle. Set oscilloscope vertical control to 2 Vidi, horizontal to 10 us/div. The oscilloscope should display one triangle wave with no visible irregularities in either slope.Operational Verification Amplitude Flatness Check ‘This procedure provides a visual check of the sine wave amplitude flatness, Equipment Required: Analog Oscilloscope a, Connect the HP 3325B signal output to the oseilloscope vertical input. Set the input switch to the 502 position. If your oscilloscope does not have 2.500 input, use a 502 feedthru termination at the input. b. Set the HP 3325B as follows: High Vottage Output (option 002) on Function Sine Frequency 2kHz “Amplitude 10Vpp Sweep Start Freq oHz Sweep Stop Freq 20 MHz Sweep Marker Freq 5 MHz Sweep Time 0.01 sec ©. Connect the HP 3325B X-Drive output to the oscilloscope channel B input. Connect the signal output to the oscilloscope channel A input. ‘td. Set the oscilloscope as follows: Display AvsB Channel A Sensitivity 1Vidiv (uncal — adjust for full vertical deflection) Channel B Sensitivity 0.5 vidiv (uncal — adjust for ful horizontal sweep) ‘Settings may vary from one oscilloscope to another. Note that whichever oscilloscope is used, it should be operated in a XY made with the HP 3925B X-Drive output driving the horizontal (X) ‘channel and the signal output driving the vertical (Y) channel. e. Pross the HP 3325B [Start Cont] key. £ The oscilloscope display should show a sweep that is essentially flat, dropping no more than 3.5%. Any de variations should be ignored, taking the peak-to-peak reading for flatness comparison. Sync Output Check ‘This test verifies the syne output signal levels. Equipment Required: Analog Oscilloscope. Connect the HP 3325B syne output to the oscilloscope vertical input. Set the input switch to the 500 position, If your oscilloscope does not have a 500 input, use a 500 feedthru termination at the input. ‘b. Set the HP 3325B function to sine, frequency to 20 MHz. ¢. Adjust the oscilloscope controls to measure the high and low voltage levels of the syne square wave. The high level should be greater than +1.2V and the low level should be less than +0,2¥, 415Operational Verification Frequency Accuracy ‘This test compares the accuracy of the HP 33258 output signal to the following specification: 45 x 10 of selected frequency (20°C to 30°C). Equipment Required: Electronic Counter (calibrated within three months or with an accurate 10 MHz external reference input) Connect the HP 33258 signal output to the electronic counter channel A input with a 500 feedthra termination, Allow HP 3325B to warm up for 20 minutes and the counter to warm up for its specified period. Set the HP 33258 output as follows: Function Sine Frequency 20 MHz Amplitude 0.99 Vpp DC Offset ov Set the counter to count the frequency of the A input with 0.1 Hz resolution, and adjust for stable triggering. Electronic counter should indicate 20 000 000.0 Hz +100 Hz. Change the HP 3325B funetion to square wave. Frequency automatically changes to 10 MHz. Electronic counter should indieate 10 000 000.0 Hz +50 Fz. Change the function to triangle. Frequency automatically changes to 10 kHz, Move the counter input to the syne output of the HP 3325B. Set the counter to average 1000 periods. Electronic counter should indicate 100 000.00 ns 0.5 ne. Change the function to positive slope ramp. Electronic counter should indicate 100 000.00 ns +0.5 ns. Output Level and Attenuator Check ‘Dhis procedure checks the output level and the attenuator by using the “de only” function, 46 Equipment Required: DC Digital Votmeter 500 Feedthru Termination Connect the HP 3325B signal output directly to a 500 feedthru termination and then with a cable to the voltmeter input. If the instrument has high voltage output (option 002), make sure the high voltage output is off (high voltage indicator light in the lower right corner of the front panel is off). Press whichever function key is presently active, indicated by a lighted indieator beside the key. This removes the ae output. The indicator beside the [DC Offset] key should light. Set the HP 3325B de offset to ~BV, then press the [Amptd Call] key.e Operational Vertication ‘The voltmeter reading should be —4.980 to -5.020 V. Change the HP 3325B de offset to +5V. Voltmeter reading should be +4,980 to +5.020 V. ‘Change the HP 39258 de offset to the following voltages. The voltmeter reading should be within the tolerances shown. DC offset Tolerances 1.4990 +£1.49300 to 1.50499 V 2499.9 mV +£0.49790 to 0.50190 V 2149.9 mv +£0.14990 t 0 0.15050 V £49.99 mV £0.04979 to 0.05019 V £14.99 mV £0.01499 t0 0.01505 V 24.999 mV +£0,004979 10 0,005019 V 4.499 mV. High Voltage Output (option 002) DC Offset Remove the 502 feedthru termination and connect the HP 8326B output directly to the voltmeter input. Select high voltage output on the HP 3325B. A LED near the key indicates that high voltage output is on. Set the HP 3325B de offset to 20V. Voltmeter reading should be +19.775 to +20.225 V. Set the HP 3325B de offfset to —20V, Voltmeter reading should be = 19.775 to ~20.225 V. Harmonic Distortion ‘This procedure tests the harmonie following specifications: istortion of the HP 3325B sine wave output to the Harmonic Distortion (relative to fundamental) Fundamental No Harmonie Greater Than 0.1 Hz to 50 kHz. 65 dB 50 10 200 kHz. 60.08 200 kHz 10 2 MH2 40.08 210 15 MHz 30.43 15t0.20 MHz =25.03_ Equipment Required: High Frequency Spectrum Analyzer Low Frequency Spectrum Analyzer 500 Feedthru Termination Resistor 4700 2W 5% Resistor 56.20 1/6W 1% 447‘Operational Verification 418 a. db, Set the HP 33258 output as follows: High Vottage Output (option 002) off Function Sine Frequency 20 MHz Amplitude 989 Mvp Connect the HP 3325B signal output to the high frequency spectrum analyzer 600 input, Set the spectrum analyzer controls to display the fundamental and at least four harmonics. Verify that all harmonies are 25 dB below the fundamental. Set the HP 3325B to 15 MHz and verify that all harmonics are at least 30 dB below the fundamental. Disconnect the HP 3325B from the high frequency spectrum analyzer and connect it to the low frequency spectrum analyzer 500 input. Set the HP 3326B to the following frequencies and verify the specified levels, relative to the fundamental. 2MHz -40.0B 200 kHz = 60 0B Set the HP 8825B frequency to 50 kHz and the amplitude to 9.99 mVpp. Set the spectrum analyzer controls to display the fundamental and at least three harmonics. (It may be necessary to decrease the video bandwidth to separate the harmonies from the noise floor.) Verify that all harmonics are at least 65 dB below the fundamental. Set the HP 3325B to the following frequencies and verify that all harmonics are 65 dB below the fundamental. 40 kHz 1 kHz 100 Hz High Voltage Output (option 002) Connect the HP 3325B signal output to the low frequency spectrum analyzer high impedance input (see figure 4-6). Select the high voltage output on the HP 3325B. Set the amplitude to 40 Vpp and the frequency to 100 Hz, Set the spectrum analyzer controls to display the fundamental and at least three harmonics. Verify that all harmonics are 65 dB below the fundamental. Set the HP 3325B to the following frequencies and verify that their harmonies are below the specified levels, relative to the fundamental, 10 KHz 65 dB 200 KHz 60 dB 1 MHz 4008 ‘Turn off the high voltage output,Operational Verification Low Frequency Spectrum Anoiyzer aoa aw NA S620 2 lew | v Figure 4-6. Harmonic Distortion Verification (High Voltage Output). Close-In Spurious Signal ‘This procedure tests the sine wave output for spurious signals which may be generated by the HP 3325B frequency synthesis circuits. The spurious signals must be more than 70 dB lower than the fundamental signal. Equipment Required: Spectrum Analyzer a. Set the HP 3325B as follows: High Voltage Output (option 002) of Function Sine Frequency 20.001 MHz Amplitude 2.99 dBm. DC Offset ov b, Connect the HP 3325B signal output to the spectrum analyzer 500 input. ¢. Set the spectrum analyzer controls for a center frequency of 20.001 MHz, a resolution bandwidth of 30 Hz, a frequency span of 100 Hz/div, and the fundamental referenced to the top of the display graticule. d. Set the spectrum analyzer center frequency to 20.002, 20.003, and 20.004 MHr, verifying in each case that all spurious signals are more than 70 dB below the fundamental. 419Performance Tests ‘The following procedures compare the instrument operation to its specifications listed in Appendix A. Performance Test Records are located at: the end of this section. These test records lists all of the tested specifications and acceptable limits. For ease of recording data at various times, copies of the blank Performance Test Records may be made without written permission from Hewlett-Packard ‘The Performance Tests include the following: Harmonie Distortion Spurious Signal Integrated Phase Noise ‘Ampitude Modulation Envelope Distortion ‘Square Wave Rise Time and Aberrations Ramp Retrace Time Sync Output ‘Square Wave Symmetry Frequency Accuracy Phase Increment Accuracy Phase Modulation Linearity ‘Amplitude Accuracy DC Offset Accuracy (OC Oniy) DC Offset Accuracy with AC Functions Tiiangle Linearty X Drive Linearity Ramp Period Variation Required Test Equipment ‘The test equipment required for the Performance Tests is listed in table 4-4. Any equipment that satisfies the critical specifications given in the table may be substituted for the recommended model. 4-20Performance Tests Table 4-4, Test Equipment Required for Performance Tests. Instrument Critical Specifications | Recommended Mode! Analog Vertical HP 1740A/TEK 2245, Oscilloscope Bandwidth: de to 100 MHz Deflection: 0.01 10 § Vialv Sweep: 0.05 ys o 0.5 s/div | Horizontal | 10 Magnification | Delayed Sweep Sampling Vertical TEK 7603* with 7711/ Oscilloscope Defiection: 2 mVidiv | 7811 andS-1 Horizontal | Sweep: 10 ps to 50 jis/div Transient response | Aberrations: |< +0.5%, ~ 3% Vp | first Sins following step transition < 21% Vpp after 5 ms | Electronic Counter Frequency measurement HP 5328 with Frequency Range: to 20 MHz Opt. 010, 040, and Resolution: 8 digs 041/53288 with Opt. 010 Accuracy: + 2 counts Time interval Average A to B Resolution: 0.01 ns i ACIDE Digital ‘AC Function (True RMS) | HP 9455A\34780 Vottmeter Ranges: 1 to 100 Accuracy : + 0.2% Resolution: § 1/2 digits Crest Factor: 4:1 DC Functions Ranges: 0.1 to 100 Accuracy: * 0.05% Resolution: 5 1/2 digits 500 Feedthru Accuracy: + 0.2% HP 11048C Termination Power Rating: 1W High Frequency Frequency Range: 1 kHz to 60 MHz | HP 1417/85525/85538/ ‘Spectrum Analyzer | Amplitude Accuracy: = 0.5 dB B566A/8568A Noise: > 70 d8 below reference Low Frequency Frequency Range: 20 Hz to 50 kHz | HP S580A/3585A ‘Spectrum Analyzer | Amplitude Accuracy: = 0.5 dB ‘Spurious Responses: 80 dB below reference | (9) This equipment is only necessary to perform the Square Wave Rise Time and Aberrations test, 421Performance Tests Table 4-4, Test Equipment Required for Performance Tests. (Cont'd) Instrument Critical Specifications Recommended Model Frequency Synthesizer Double Balanced Mixer 1 MHz Low Pass Fitter 15 kHz Filter AC Voltmeter Sine Wave Signal Source DC Power Supply ‘Thermal Converter Resistive Divider Resistive Divider Frequency Range: 100 kHz to 21 MHz Amplitude Range: to +13.01 dBm Output Impedance: 500. Phase Noise (Integrated): 9.9 MHz: < ~ 63.08 20 MHz: < ~ 70 dB Spurious: > 75 dB below fundamental Impedance: 500 Frequency Range: 1-20 MHz Cut-off Frequency: 1 MHz Stopband Atten: 50 dB by 4 MHz Stopband Freq: 4— 80 MHz Consisting of: Resistor: 10k 1% Capacitor: 1600 pF 5% Ranges: 0.1 to 1 V Frequency Range: 20 Hz~1 MHz Input impedance: 21 MQ Meter: Log scale ‘Ace (100 Hz to 10 kHz): 1% Frequency: 10 kHz ‘Amplitude: 1 Vrms Into 20 kQ Distortion: —60 dB Volts: 010 +5 ‘Amps: 10 mA Floating Output Input impedance: 500 Input Voltage: 1 Vrms Frequency: 2 kHz to 20 MHz Frequency Response: #0.05 dB 2 kHz 10 20 MHz Consisting of: 2 Resistors: 61.110 0.1% 1/4W 2 Resistors: 36.550 0.1% 1/8W Consisting of: Capacitor: 300 pF 5% ‘3 Resistors: 13300 0.1% 1/4W Resistor: 430 0.1% 1/8W HP 33354, HP 105348, Model J903 TTE Inc. 22148. Benny Ave. Los Angeles, CA 80066 HP 0757-0340 HP 0160-2223 HP 400FL/34008 HP 2040/3325/3336 HP 62140/6214B HP 11050A/Ballantine Model 13954-1 with cable 125774 Opt. 10 Ballantine Labs, nc. P.O. Box 97 Boonton, NJ 07005 HP 0699-0090 HP 0698-7169, HP 01602207 HP 0698-7453, HP 0698.8264 422Performance Tests. Table 4-4, Test Equipment Required for Performance Tests. (Cont'd) Instrument | Critical Specifications Recommended Model HighSpeed DC | DC Voltage: Oto +10 HP 34378 DigtalVotmeter | External Tigger Low True TTL Edge Trigger Trigger Delay: Selectable 10 to 1408 BNC:to-Triax Adapter | Female BNC to Male Triax HP 1250.0595 Resistive Divider Consisting of: +25 Resistor: 300 1% 1/4W HP 0698-7533 Resistor: 200 1% 1/4W HP 068.6296 Resistive Divider Consisting of: | +26 Resistor: 100 kO 1% 1/8W HP 0757-0465 Resistor: 162 KO 13% 1/8W HP 0757-0470 Resistor 4700 2W 5% HP 0698-9634 Resistor 56.20 1/BW 1.0% | Hp 0757-0395 | Adapter BNC female to dual banana plug | HP 1251-2277 BNC Tee HP 1250-0781 Stop Attenuator 0-12.08; 1 dB stops HP 3556 | 0-40.08 HP 3550" (*) This equipment is only necessary to perform the Square Wave Rise Time and Aberrations test. Harmonic Distortion ‘This procedure tests the harmonic distortion of the HP 3825B sine wave output to the following specifications: Harmonic Distortion (relative to fundamental) Fundamental No Harmonic Frequency Greater than 10.1 Hz 10 50 kHz 65 dB 50 10 200 KHz 60.68 200 kHz to 2 Miz 40.08 21015 MHz 90 6B 1510.20 MHz 25 0B Equipment Required: High Frequency Spectrum Analyzer Low Frequency Spectrum Analyzer 500 Feedtthru Termination Resistor 4700 2w 5% Resistor 56.20 1/8W 1% 423Performance Tests 4.24 a Set the HP 3325B output as follows: High Voltage Output (option 002) of Function Sine Frequency 20 MHz Amplitude 999 MVpp, Connect the signal output to the high frequency spectrum analyzer 500 input, Set the spectrum analyzer controls to display the fundamental and at least, four harmonics. Verify that all harmonies are 25 dB below the fundamental. Set the HP 3325B to 15 MHz and verify that all harmonies are at least 30 dB below the fundamental. Disconnect the HP 3325B from the high frequency spectrum analyzer and connect it to the low frequency spectrum analyzer 500 input. Set the HP 3325B to the following frequencies and verify the specified levels, relative to the fundamental. 2MHz 40 dB 200 kHz ~60 08 Set the HP 3925B frequency to 50 kHz and the amplitude to 9.99 mVpp. Set the spectrum analyzer controls to display the fundamental and at least three harmonies, (It may be necessary to decrease the video bandwidth to separate the harmonics from the noise floor.) Verify that all harmonics are at least 65 dB below the fundamental. Set the HP 3325B to the following frequencies and verify that all harmonics are 65 dB below the fundamental. 10 kHz kHz 400 Hz High Voltage Output (option 002) Connect the HP 3325B signal output to the low frequency spectrum analyzer high impedance input (see figure 4-6). Select the high voltage output on the HP 3325B. Set the amplitude to 40 Vpp and the frequency to 100 Hz. Set the spectrum analyzer controls to display the fundamental and at least three harmonies. Verify that all harmonies are 65 dB helow the fundamental. Set the HP 3825B to the following frequencies and verify that their harmonies are below the specified level, relative to the fundamental 10kHz -65. cB 200 kHz 60 08, MHz 40 08 ‘Turn off the high voltage output.Performance Tests Spurious Signal ‘This procedure tests the HP 3325B sine wave output for spurious signals. Circuits within the HP 3325B may generate repetitive frequencies that are not harmonically related to the fundamental output frequency. All spurious signals must be more than 70 dB below the fundamental signal or less than ~90 Bm, whichever is greater. Equipment Required: Spectrum Analyzer Mixer Spurious: a, Connect the HP 3325B signal output to the spectrum analyzer 500 (RF) input and the HP 3325B EXT REF input to the analyzer 10 MHz reference output (see figure 4-7). b. Set the HP 33258 as follows: Function Sine Amplitude =20 08m Frequency 2.001 MHz ©. Set the analyzer controls as follows: Center Frequency 2.001 MHz Frequency Span kHz Video 87 400 Hz Resolution BW 30 Hz d. Adjust the spectrum analyzer to referenee the fundamental to the top display graticule, e. Without changing the reference level, change the spectrum analyzer center frequency to 27.999 MHz to display the 2:1 mixer spur. Verify that this spur is at least 70 dB below the fundamental. £ Change the spectrum analyzer center frequency to 25.998 MHz to display the 8:2 mixer spur. Verify that this spur is at least 70 dB below the fundamental. g — Inasimilar manner, change the HP 3325B frequency and the spectrum analyzer center frequency to the following frequencies. For each setting, verify that all spurious signals are 70 dB below the fundamental. Spectrum Analyzer HP 39258 renter Frequency 2:1 Spur 8:2 Spur 4.100 MHz 25.9 MHz 21.8 MHz 6.100 MHz. 23.9 MHz 178M 8.100 MHz 21.9 MHz 13.8 MHz 40.100 MHz 49.9MHz 9.8 MHz 12.100 MHz. 17.9 MHz 5.8 MHz 14.100 MHz. 18.9 MHz 1.8 MHz 36.100 MHz. 18.9 MHz 2.2MHz 18.100 MHz 14.9 MHz 6.2MHz 20.100 MH2 9.9 MHz 10.2 Miz, 425Performance Tests ‘SPECTRUM ANALYZER Figure 4-7. Mixer Spurious. Close-in Spurious (Fractional N Spurs) h. Set the HP 33258 frequency to 5.001 MHz and the amplitude to ~2.99 dBm. i. Sot the spectrum analyzer controls as follows: Center Frequency 5.001 MHz Frequency Span 1 kHe Video BW 100 Hz Resolution BW 30Hz j. Adjust the spectrum analyzer to reference the fundamental to the top display graticule, k. Without changing the reference level, change the spectrum analyzer center frequency to 5,002 MHz. to display the API 1 spur. It may be necessary to decrease the video bandwidth to optimize the display resolution. 1. All spurious (non-harmonie) signals should be at least 70 dB below the fundamental. m. Without changing the reference level, set the HP 3325B frequency and the spectrum analyzer center frequency to the frequencies listed below. For each sotting, verify that all spurious signals are at least 70 dB below the fundamental. Spectrum Analyzer Hp 33258 Genter Frequency 5.0001 Miz ‘5.0071 MH 5.00001 M2 ‘5.00101 M2 5.000001 MHz 5.003001 MHz 20001 MH 20.002 MHz 20.001 wiz 20.003 Miz 20.001 MHz 20.004 MHz 20,008 Mie 20,005 Mie 426Performance Tests Integrated Phase Noise ‘This test compares the HP 3325B integrated phase noise to the following specification: 60 dB for a 30 kHz band centered on a 20 MHz cartier (exclu about the cartier). get Hz Equipment Required: Frequency Synthesizer Double Balanced Mixer ‘500 Feedthru Termination AC/DC Digital Voltmeter ‘AC Voltmeter 15 kHz noise equivalent fiter consisting of: Resistor: 10 KO + 1% ‘Capacitor: 1600 pF + 5% (soe figure 4-8) 4 MHz Low Pass Filter Connect the equipment as shown in figure 4-8, connecting the 15 kHz noise equivalent filter output to the ac voltmeter. Phase lock the HP 3325B and the signal generator together. b. Set the HP 3325B as follows: Function Sine Frequency 19.901 MHz Amplitude o.dBm c. Sot the synthesizer (reference) as follows Frequency 19.9 MHz Amplitude +7.00 dam 4. Record the ac voltmeter reading (dB seale). e. Change the HP 33258 frequency to 19.9 MHz, f. Connect the 15 kHz filter output to the digital voltmeter, g Pros the HP 8325B [Phase] key. Using the modify keys, adjust the output phase for a minimum reading on the digital voltmeter. h. Disconnect the 15 kHz filter output from the digital voltmeter and connect it to the ac voltmeter. i. Record the ac voltmeter reading (4B scale) and subtract it from the reading recorded in step d. The difference should be ~64 dB or greater. Add —6 dB to this number and enter on the Performance Test Record. The 6 dB is a correction factor compensating for the folding action of the mixer. NOTE Frequencies used minimize the phase noise contribution of the frequency ‘synthesizer. 427Performance Tests AC. VOLTMETER vn 1D. La Fase FLIER son c1 =| +— Figure 4-8. Integrated Phase Noise. Amplitude Modulation Envelope Distortion ‘This procedure tests the HP 8325B amplitude modulation envelope distortion to the following specification: —30 dB to 80% modulation at 1 kHz, OV de offset Equipment Required: Sine Wave Signal Source ‘Spectrum Analyzer a, Connect the equipment as shown in figure 4-9. b. Set the HP 33258 output as follows: Function Sine Frequency 1 MHz Amplitude 3V ep DC Offset ov High Voltage Output (option 002) off AN on 428Performance Tests SPECTRUM ANALYZER Figure 4-9. AM Envelope Distortion. ¢. Set the modulating signal source frequency to 1 kHz. and adjust the level to produce 80% modulation of the HP 3325B output. This is indicated by modulation sidebands being 8.0 dB down from the carrier, as viewed on the 2 dB/div display of the spectrum analyzer. 4. Adjust the spectrum analyzer to display the fundamental frequency, the 1 kHz sideband frequency, and at least 4 harmonics of the sidebands. All harmonies should be at least 30 dB lower than the modulation sidebands. Square Wave Rise Time and Aberrations ‘This procedure compares the HP 3525B square wave output to its rise/fall time and overshoot specifications, Rise and Fall Time: <20 ns, 10% to 90% at full output Overshoot: <5% of peak-to-peak amplitude at full output Equipment Required: Sampling Oscilloscope 40 dB Attenuator a, Connect the HP 33258 signal output to the attenuator input and the attenuator output to the oscilloscope input. Set the attenuator for 40 dB attenuation, b. Set the HP 33258 as follows: High Voltage Output (option 002) on Funetion Square Frequency MHz Amplitude 40 pp 429Performance Tests. Adjust the oscilloscope vertical and horizontal controls so that the square ‘wave rise time between the 10% and 90% points can be measured. Rise time should be loss than 20 ns. Adjust the oscilloscope vertical and horizontal controls so that the square wave fall time between the 10% and 90% points can be measured. Fall time should be less than 20 ns. Adjust the oseilloseope vertical and horizontal controls so that the square wave overshoot can be measured. Overshoot should be less than 500 mV at and negative peaks. posi Ramp Retrace Time ‘This test compares the HP 3325B retrace time of the positive and negative slope ramps to the following specification: $3 128 90% to 10% Equipment Required: Analog Oscilloscope a a Connect the HP 3325B signal output to the oscilloscope vertical input. Set the input switch to the 502 position, If your oscilloscope does not have a ‘500 input, use a 500 feedthru termination at the input. Set the HP 3325B as follows: High Voltage Output (option 002) oft Function Posttive Slope Ramp Frequency 40 kHz Amplitude 10 Vpp ‘Adjust the oscilloscope vertical and horizontal controls so that the ramp retrace time from the 90% to 10% points can be measured. Retrace time should be less than 3 us. Change function to negative slope ramp and repeat step e. Sync Output ‘This procedure checks the voltage levels of the square wave on the HP 8325B front and rear panel syne outputs to the following specifications: Vhigh > +1.2V; Viow < +0.2V into SOQ Equipment Required: Analog Oscilloscope a Connect the HP 3325B front syne output to the oscilloscope vertical input, Sot the input switch to the 500 position, If your oscilloscope does not have a 500 input, use a 500 feedthru termination at the input. Sot the HP 3325B function to sine, frequency to 20 MHz.Performance Tests 3325, ELECTRONIC Bee) = hE it} Figure 4-10. Square Wave Symmetry. Adjust the oscilloscope controls to measure the high and low levels of the syne square wave. The high level should be greater than +1.2V and the low level should be less than +0.2V. Repeat the measurement for the rear panel FAST “syne output, The high level should be greater than +1.5V and the low lovel less than +0.5V. Square Wave Symmetry ‘This procedure checks the symmetry of the HP 3325B square wave signal output to the following specification: 50.02% of period +3 nanoseconds Equipment Required: Electronic Counter @ — Connect the HP 8325B signal output to both inputs of the electronic counter, using a BNC tee (see figure 4-10). b. Set the HP 3325B output as follows: Function ‘Square Frequency MHz “Amplitude ims DC Offset ov © Adjust the electronic counter to measure time interval average A to B, with Slope A +, Slope B -. Note the reading. a Change Slope A to ~, Slope B to +. Reading should be equal to the reading in stepe+ <8.2ns, FAST ™ is a trademark of Fairchild Semiconduetor Corporation,Performance Tests ELECTRONIC COUNTER Figure 4-11. Frequency Accuracy. Frequency Accuracy ‘This test compares the accuracy of the HP 3325B output signal to the following specifications: £5 x 10 of selected frequency (20°C to 30°C). Equipment Required: Electronic Counter (calibrated within three months or with an ce. 482 accurate 10 MHz extemal reference input) Connect the HP 3325B signal output to the electronic counter channel A input with a 500 feedthru termination, Allow the HP 3325B to warm up for 20 minutes and the counter’s frequency reference to warm up for its specified period. Sot the HP 3325B output as follows: Function sine Frequency 20 MHz Amplitude 0.99 Vp DC Offset ov Sot the counter to count the frequency of the A input with 0.1 Hz resolution, and adjust for stable triggering. Electronic counter should indicate 20 000 000.00 Hz +100 Hz. Change the HP 3325B function to square wave. Frequency automatically changes to 10 MHz. Electronic counter should indicate 10 000 000.0 Hz =50 Hz, Change the HP 3325B function to triangle. Frequency automatically changes to 10 kHz, Move the counter input to the syne output of the HP 3325B, Set the counter to average 1000 periods, Electronic counter should indicate 100 000.00 ns +0.5 ns. Change the HP 3325B funetion to positive slope ramp. Electronic eounter should indicate 100 000.00 ns +0.5 ns.Performance Tests To EXT REF IN ELECTRONIC COUNTER lowe| SYNTHESIZER REF. 7 REFERENCE, Figure 4-12. Phase Increment Accuracy. Phase Increment Accuracy ‘This test compares the HP 3325B phase increment accuracy to the following specification: 10.2" Equipment Required: Frequency Synthesizer Electronic Counter ‘Connect the equipment as shown in figure 4-12. b. Set the HP 89258 as follows: High Voltage Output (option 002) on Function Sine Frequency 100 kHz Amplitude 13.d8m ¢. Set the synthesizer as follows: Frequency 0.1 MHz, Amplitude 13.dBm, 4. Set the counter as follows: Function rear e Frequency Resolution, N 1 Inputs: 500, Separate Slope A and B Positive ‘Sample Rate Maximum e. Press the HP 3325B [Phase] key to display phase. Using the modify keys, adjust the phase until the counter reads approximately 200 ns. Press the blue [Shift] key, then the [Asgn Zero ©] key. 433Performance Tests Set the counter sample rate to hold, then reset the counter. Record the counter reading (to 2 decimal places) on the Performance Test Record in the space for Zero Phase Time Interval. This is the phase difference (in nanoseconds) between the HP 33258 output and the reference signal. Set the HP 3325B phase to ~1°. Reset the counter, Record the counter reading (to 2 decimal places) in the space for 1° Increment Time Interval. Determine the time difference between the counter readings in steps h and f, and record in the Time Difference column. The difference should be from 22.22 to 33.34 ns, Set the HP 3325B phase to —10°, Reset the counter. Record the counter reading in the space for 10° Increment Time Interval. Enter the time difference between the Zero Phase Time Interval and the reading in step k in the Time Difference column. This should be from 272.22 to 283.34 ns, Set the HP 3325B phase to —100°, Reset the counter. Record the counter reading in the space for 100° Incremental Time Interval. Enter the time difference between the Zero Phase Time Interval and the reading in step n in the Time Difference column, It should be from 2722.22 to 2783.34 ns, Phase Modulation Linearity ‘This procedure compares the HP 3325B phase modulation linearity to the following specification: 434 a. +0.5%, best ft straight line Equipment Required: Frequency Synthesizer Electronic Counter DC Power Supply Digital Voltmeter Connect the equipment as shown in figure 4-13,Performance Tests POWER SUPPLY MoD iN’ 0 PHASE 35 ELECTRONC COUNTER = ea T ro anc be DIGITAL yee To ExT REF IN VOLTNETER loves REF OUT SYNTHESIZER REFERENCE a, e Figure 4-13, Phase Modulation Linearity. Set the HP 3325B as follows: of Sine 4100 kHz 43.dBm Phase Modulation On Set the synthesizer as follows: Frequency 400 kHz, Ampiitude 13.d8m Sot the electronic counter as follows: Function Tinge interval Avg A to B Frequency Resolution, N 10 Inputs 500, Separate Slope A and B Positive ‘Sample Rate Maximum Using the voltmeter to monitor the de power supply output, sot the de voltage as near ~5.0000V as possible. Press the HP 3325B [Phase] key to display phase, Using the modify keys, adjust the phase until the counter reads approximately 200 ns. Record the counter reading as a reference for the following steps. ‘As soon as possible after recording the counter reading, note the voltmeter reading and record on the Performance Test Record in the DVM Reading, xy space. Press the HP 3325B blue [Shift] key, then the [Asgn Zero 9] key. Change the de power supply output to —4.0000V. Using the modify keys, adjust the HP 3325B phase to return the counter reading to the value recorded in step f