UPLINK POWER

CONTROL SYSTEM

The Uplink Power Control System (UPC) is a self-

contained, rack-mountable unit, designed for geo-
stationary satellite communication systems. It adjusts
MODEL FREQUENCY the strength of uplink signals at IF frequencies to
UPC-A 50 – 180 MHz compensate for varying weather conditions. The UPC
UPC-L 950 – 2150 MHz can be setup completely from the front panel or over a
remote bus via a host computer. All monitor and
control functions are accessible at the front panel as
well as over the remote bus.

A customer supplied Beacon Receiver provides the

UPC with a DC voltage proportional to the downlink
signal strength.

The UPC is configured with one attenuator channel

FEATURES and is capable of up to a total of ten attenuator
• Up to 10 attenuator channels channels. Each attenuator is capable of providing up
• 20 dB correction range to 20 dB of power correction. In the event of an
• Failsafe signal path attenuator fault or power loss to an attenuator, the
• Fully redundant power supplies signal will be switched to a failsafe path. This failsafe
• RS485/RS422 selectable remote path is routed through the rear panel via a “U” link
interface connection. This connection allows the user to install a
• Field expandable attenuator channels fixed attenuator in each path.
• DC and 10 MHz by-pass (UPC-L)
The UPC is equipped with fully redundant power
OPTIONS supplies.
• Remote RS232 or IEEE-488 interface
 SPECIFICATIONS

Model Model
Functional UPC-A UPC-L
Frequency 50–180 MHz 950–2150 MHz
Insertion loss at minimum attenuation 1.5 dB maximum 3.5 dB maximum
Attenuation range 20 dB in 0.2 dB steps 20 dB in 0.2 dB steps
Amplitude response ±0.2 dB/50–90 MHz ±0.75 dB/950–1750 MHz
±0.25 dB/100–180 MHz
Input return loss 20 dB minimum 15 dB minimum
Output return loss 20 dB minimum 15 dB minimum
Input/output impedance 75 ohms (50 ohms optional) 50 ohms
Input third order intercept point +28 dBm minimum +28 dBm minimum
Power output at 1 dB compression point +18 dBm minimum +18 dBm minimum
Failsafe path insertion loss 1 dB maximum 2 dB maximum
DC by-pass
Power 24 VDC/2 amp
maximum (no fuse)
Reference 5/10 MHz, 1 dB typical insertion
loss 2 dB maximum
Attenuator channel status outputs Normally closed
Summary alarm Form C
Remote interface User selectable RS485 or RS422
Beacon level voltage input 0 to +10 VDC or 0 to -10 VDC

OPTIONS

1. Optional configurations. 15. 50 ohm IF impedance (UPC-A only).

1-2. Two attenuator channels. 15-1. 50 ohm IF impedance Channel 1.
1-3. Three attenuator channels. 15-2. 50 ohm IF impedance Channel 2.
1-4. Four attenuator channels. 15-3. 50 ohm IF impedance Channel 3.
1-5. Five attenuator channels. 15-4. 50 ohm IF impedance Channel 4.
1-6. Six attenuator channels. 15-5. 50 ohm IF impedance Channel 5.
1-7. Seven attenuator channels. 15-6. 50 ohm IF impedance Channel 6.
1-8. Eight attenuator channels. 15-7. 50 ohm IF impedance Channel 7.
1-9. Nine attenuator channels. 15-8. 50 ohm IF impedance Channel 8.
1-10. Ten attenuator channels. 15-9. 50 ohm IF impedance Channel 9.
15-10. 50 ohm IF impedance Channel 10.
2. Normally open attenuator channel status outputs.

17. Remote control.

C. RS232.
F. IEEE-488.

Note: Missing option numbers are not applicable for this system.

BEACON RECEIVER REQUIREMENTS

Voltage output ...................................................... 0 to +10 VDC or 0 to -10 VDC
Contact closure status outputs............................. Closure for fault or open fault

Note: For more detailed descriptions of the Uplink Power Control System, refer to MITEQ’s Technical Note
25T029.
 FUNCTIONAL BLOCK DIAGRAM

CHANNEL 1 IF INPUT SPDT PROCESSOR

CHANNEL 1 FAILSAFE OUTPUT
"U" LINK
CHANNEL 1 FAILSAFE INPUT
CHANNEL 1 IF OUTPUT SPDT BEACON LEVEL "A" BEACON
VOLTAGE INPUT RECEIVER "A"
CHANNEL 2 IF INPUT SPDT
BEACON LEVEL "A"
CHANNEL 2 FAILSAFE OUTPUT STATUS INPUT
"U" LINK
CHANNEL 2 FAILSAFE INPUT
CHANNEL 2 IF OUTPUT SPDT
BEACON LEVEL "B" BEACON
VOLTAGE INPUT RECEIVER "B"
CHANNEL 3 IF INPUT SPDT

CHANNEL 3 FAILSAFE OUTPUT BEACON LEVEL "B"

"U" LINK STATUS INPUT
CHANNEL 3 FAILSAFE INPUT
CHANNEL 3 IF OUTPUT SPDT

CHANNEL 4 IF INPUT SPDT

CHANNEL 4 FAILSAFE OUTPUT

"U" LINK
CHANNEL 4 FAILSAFE INPUT
CHANNEL 4 IF OUTPUT SPDT

CHANNEL 5 IF INPUT SPDT

POWER SUPPLY "A"
CHANNEL 5 FAILSAFE OUTPUT PRIMARY
"U" LINK SUPPLY
CHANNEL 5 FAILSAFE INPUT
CHANNEL 5 IF OUTPUT SPDT

CHANNEL 6 IF INPUT SPDT POWER SUPPLY "B"

SECONDARY
CHANNEL 6 FAILSAFE OUTPUT SUPPLY
"U" LINK
CHANNEL 6 FAILSAFE INPUT
CHANNEL 6 IF OUTPUT SPDT

CHANNEL 7 IF INPUT SPDT

CHANNEL 7 FAILSAFE OUTPUT

"U" LINK
CHANNEL 7 FAILSAFE INPUT
CHANNEL 7 IF OUTPUT SPDT

CHANNEL 8 IF INPUT SPDT UPC-L ONLY

CHANNEL 8 FAILSAFE OUTPUT
"U" LINK DIPLEXER
CHANNEL 8 FAILSAFE INPUT
CHANNEL 8 IF OUTPUT SPDT SPDT

10 MHz
AND DC
CHANNEL 9 IF INPUT SPDT "U" LINK BYPASS
CHANNEL 9 FAILSAFE OUTPUT
SPDT
"U" LINK
CHANNEL 9 FAILSAFE INPUT
DIPLEXER
CHANNEL 9 IF OUTPUT SPDT

CHANNEL 10 IF INPUT SPDT

CHANNEL 10 FAILSAFE OUTPUT

"U" LINK
CHANNEL 10 FAILSAFE INPUT
CHANNEL 10 IF OUTPUT SPDT

UPLINK POWER CONTROL UNIT

UPLINK POWER CONTROL SYSTEM

GENERAL SPECIFICATIONS
PRIMARY POWER REQUIREMENTS
Voltage ................................................................. 90–250 VAC
Frequency ............................................................ 47–63 Hz
Power consumption.............................................. 40 W typical

PHYSICAL
Weight .................................................................. 25 pounds nominal
Overall dimensions............................................... 19” x 5.25” panel height x 20” maximum
Connectors
Signal Path
UPC-A.......................................................... BNC female
UPC-L .......................................................... SMA female
Beacon level voltage inputs ............................ BNC female
Receiver fault inputs ....................................... DE-9P
Status output................................................... DB-25S
Remote interface
RS485, RS422, RS232................................ DE-9S
IEEE-488 ..................................................... GPIB receptacle

ENVIRONMENTAL
Operating
Ambient temperature ...................................... 0 to 50°C
Relative humidity............................................. Up to 95% at 30°C
Atmospheric pressure ..................................... Up to 10,000 feet
Nonoperating
Ambient temperature ...................................... -50 to +70°C
Relative humidity............................................. Up to 95% at 40°C
Atmospheric pressure ..................................... Up to 40,000 feet
Shock and vibration ........................................ Normal handling by commercial carriers

100 Davids Drive, Hauppauge, NY 11788

TEL.: +1-631-436-7400 • FAX: +1-631-436-7431
www.miteq.com
D-218G 10•07