3.4.3.
2 Regulatory requirements
HIRHF-REG-001
HIRHF-REG-002
3.4.3.3 Functional requirements
HF Radios
HIRHF-FCT-001
HIRHF-FCT-002
HIRHF-FCT-003
HIRHF-FCT-004
HIRHF-FCT-005
HF Radio transmitting
equipment
HIRHF-FCT-006
HIRHF-FCT-007
HIRHF-FCT-008
HIRHF-FCT-009
HIRHF-FCT-010
HIRHF-FCT-011
HIRHF-FCT-012
HIRHF-FCT-013
HIRHF-FCT-014
HIRHF-FCT-015
HIRHF-FCT-016
HIRHF-FCT-017
HF Radio receivers
HIRHF-FCT-018
HIRHF-FCT-019
HIRHF-FCT-020
HIRHF-FCT-021
HIRHF-FCT-022
HIRHF-FCT-023
HIRHF-FCT-024
HIRHF-FCT-025
HF Radio interfaces
HIRHF-FCT-026
Automatic self-test
HIRHF-FCT-027
Frequency range, frequency
grid, emission class, AF
band
HIRHF-FCT-028
Frequency stability
HIRHF-FCT-029
Supported communication modes
HIRHF-FCT-030
HIRHF-FCT-031
HF Radio remote control panels and
audio panels
HIRHF-FCT-032
HIRHF-FCT-033
HIRHF-FCT-034
HIRHF-FCT-035
HIRHF-FCT-036
HF antennas
HIRHF-FCT-037
HIRHF-FCT-038
HIRHF-FCT-039
HIRHF-FCT-040
HIRHF-FCT-041
Backup HF radios
HIRHF-FCT-042
HIRHF-FCT-043
HIRHF-FCT-044
HIRHF-FCT-045
HIRHF-FCT-046
HIRHF-FCT-047
HIRHF-FCT-048
HIRHF-FCT-049
HIRHF-FCT-050
HIRHF-FCT-051
HIRHF-FCT-052
HIRHF-FCT-053
HIRHF-FCT-054
Microwave link
HIRHF-MWL-001
HIRHF-MWL-002
HIRHF-MWL-003
HIRHF-MWL-004
HIRHF-MWL-005
3.4.3.4 Performance requirements
Supported protocols
HIRHF-PER-001
HIRHF-PER-002
Reliability of the radio stations
HIRHF-PER-003
HIRHF-PER-004
HIRHF-PER-005
Updating embedded software
HIRHF-PER-006
Radio equipment interfaces
HIRHF-PER-007
HIRHF-PER-008
HIRHF-PER-009
HIRHF-PER-010
HIRHF-PER-011
Signalling interfaces
HIRHF-PER-012
HIRHF-PER-013
HIRHF-PER-014
Push-to-talk activation interfaces
HIRHF-PER-015
HIRHF-PER-016
HIRHF-PER-017
HIRHF-PER-018
HIRHF-PER-019
Squelch indication interfaces
HIRHF-PER-020
HIRHF-PER-021
HIRHF-PER-022
HIRHF-PER-023
Serial Interfaces
HIRHF-PER-024
HIRHF-PER-025
HIRHF-PER-026
Ethernet Interfaces
HIRHF-PER-027
HIRHF-PER-028
HIRHF-PER-029
HIRHF-PER-030
External Interfaces
HIRHF-PER-031
HIRHF-PER-032
HIRHF-PER-033
RF Interfaces
HIRHF-PER-034
HIRHF-PER-035
HIRHF-PER-036
HIRHF-PER-037
HIRHF-PER-038
3.4.3.5 Technical requirements
Lightning Protection
HIRHF-TEC-001
Environmental Requirements
HIRHF-TEC-002
HIRHF-TEC-003
HIRHF-TEC-004
HIRHF-TEC-005
Electromagnetic compatibility of
equipment
HIRHF-TEC-006
HIRHF-TEC-007
HIRHF-TEC-008
Grounding
HIRHF-TEC-009
HIRHF-TEC-010
HIRHF-TEC-011
Network connection
HIRHF-TEC-012
HIRHF-TEC-013
HIRHF-TEC-014
HIRHF-TEC-015
Telecommunication cabinets
HIRHF-TEC-016
HIRHF-TEC-017
HIRHF-TEC-018
HIRHF-TEC-019
HIRHF-TEC-020
HIRHF-TEC-021
HIRHF-TEC-022
HIRHF-TEC-023
HIRHF-TEC-024
DC System requirements
HIRHF-TEC-025
HIRHF-TEC-026
HIRHF-TEC-027
HIRHF-TEC-028
HIRHF-TEC-029
3.4.3.6 Installation requirements
HIRHF-INST-001
HIRHF-INST-002
The VHF radio equipment shall comply with the relevant requirements of the following standards and
documents:
• ICAO Annex 10, Aeronautical Telecommunications, Vol. 3, Communication Systems, 2nd Ed., July,
2007;
• CAASI Part 171 - Aeronautical Telecommunication Services - Operation and Certification, Ed. 2017;
• ETSI, EN 300 676-1, 2007;
• ETSI, EN 302 617-1, 2009;
• EUROCAE, ED-137/1C, Interoperability Standards for VoIP ATM Components, Vol. 1: Radio., 2020.
Where a conflict occurs between this and any other specification or document referred to above, the
requirements of this specification shall take precedence. Where a conflict exists between this
specification and the drawings for the specification, clarification shall be obtained from the Employer’s
project manager.
Client requires turnkey solution for HF radio system for provisioning HF communication services
provision in the FIZ Honiara.
The Supplier should design a HF radio system according to the specified system described in this
document and in its attachment diagrams.
Note: In his offer, the Supplier may propose any reasonable alternative design that
would provide the same level of service whilst meeting all safety requirements
At contract award, the Contractor shall conduct a site survey to determine the details of the system to
be implemented.
The HF transmitters to be supplied shall be multiband transmitters design, capable of being
simultaneously tuned to multiple frequencies across the aviation band in the range of 1.5 - 30 MHz.
The HF receivers to be supplied shall be multiband receivers design, capable of being simultaneously
tuned to multiple frequencies across the aviation band in the range of 1.5- 30 MHz.
Transmitter output power shall be high enough to ensure reliable radio communication with the aircraft
in the area of responsibility of a local control point, as well as radio communication with the most
remote airport according to the radio communication organization scheme.
Transmitting power shall be 500 W and the transmitter shall support step output power adjustment.
To protect a transmitter from failure, the transmitter shall allow reduction of its power output in the
following cases:
• Reduction of VSWR in the feeder; and
• Increase of background temperature above its nominal value
A transmitter shall withstand a short circuit or feeder line cut-off without damage.
Ripple of amplitude frequency response and harmonic distortions of transmitter`s single band path shall
meet the following requirements:
• ipple of amplitude frequency response of transmitter`s single band path ≤ ± 1.5 dB;
• Transmitter total harmonic distortion: ≤ 1%.
Transmitter noise spectral density shall be in case of
• A tune out of ±30 kHz from the carrier frequency: ≤ –135 dBc/Hz;
• A tune out of 10 % or more from the carrier frequency: ≤ –150 dBc/Hz.
Transmitter spurious emissions shall meet the following requirements:
• Harmonic (sinusoidal) components: ≤ –45 dBc (in CW mode);
• Other spurious components in case of a tune up of up to 5% of the carrier frequency: ≤ –60 dBc;
• Other spurious components in case of a tune up of more than 5% of the carrier frequency: ≤ –80 dBc;
• Third order intermodulation products: ≤ –36 dB РЕР.
J3E mode carrier suppression shall be ≥ 60 dB РЕР.
Suppression of non-operating (idle) sideband in J3E mode shall be ≥ 60 dB РЕР.
Input impedance of line path of transmitter`s audio frequencies shall be 600 Ohm (bal.).
AF signal control range shall be in a range between –8 dBm and + 6 dBm.
Transmitters or transceivers control shall support the following PTT signals:
• Local control via PTT microphone switch (handset);
• Remote control of ground contact;
• Remote control of voltage of ±12 V or ±48 V;
• Remote control via IP-protocol.
HF radio sensitivity in J3E mode shall be SINAD = 10 dB: ≤ -123 dBm (0.32 mkV).
Maximum level at F input without damaging the receiver shall be ≥ +53 dBm (100 ).
Ripple of amplitude frequency response and harmonic distortions of transmitter`s single band path shall
be ≤ ± 1.5 dB and total harmonic distortion shall be ≤ 1%.
Receiver noise factor shall be ≤ 9 dB and third-order intermodulation intersection point in case of a
tune out of ± 30 kHz and at 0 dBm: ≥ +35 dB.
Attenuation of signals of spurious receiver channels shall meet the following requirements:
• Attenuation of signals at intermediate frequency shall be ≥ 90 dB;
• Image channel signal attenuation shall be ≥ 80 dB;
• Non-operating sideband attenuation shall be ≥ 60 dB
Range of voltage Automatic Gain Control (AGC) regulation at receiver`s output if the input signal
changes from 1 mk to 1 shall be: ≤ 3 dB.
Audio frequency output shall meet the following requirements:
• Output impedance of line path of receiver`s audio frequencies: 600 Ohm (bal.);
• Receiver’s output voltage at impedance of 600 Ohm: adjustable between –10 dBm and + 10 dBm;
• Receiver shall have a built-in speaker
Receivers shall have spectral and amplitude noise reduction.
Transceivers shall have the following interfaces:
• Coaxial unbalanced antenna and feeder transmission line (antenna-feeder path) with wave
impedance of 50 Ohm;
• Interface for controlling external antenna tuning unit (if needed);
• 600 Ohm balanced line for audio frequency and control (4-wire E&M circuit);
• Microphone (handset) jack with PTT option (PTT button); and
• Ethernet interface for VoIP mode and connection of a Remote Control and Monitoring System
(RCMS).
All radio units (transceivers, receivers and transmitters) shall be able to automatically selftest
parameters and correct functioning of all systems and subunits.
HF radios shall meet the following requirements:
• As a minimum, operating frequency range shall be within the following: 1.5 - 30 MHz;
• Operating frequency grid step (spacing): 1 Hz;
• Emission class: J3E (LSB, USB);
• Transmission of discrete information of B7D, F1D, F1B, J2D classes shall be available;
• J3E AF bandwidth: 0.3 – 3.4 kHz.
Acceptable long-term frequency instability (per year): ±1х10^-7.
Transceiver shall support selective calling of aircraft crew members (SELCAL).
Transceiver shall support modern adaptive radio communication modes, such as ALE-2G, ALE-3G.
Panels shall have compact design that allows them to be easily embedded in racks and consoles.
Interfaces for controlling radio station and AF signals:
• 4-wire E&M (E&M 4) circuit;
• VoIP in accordance with EUROCAE ED-137 (100BaseT);
• Tone signalling for PTT and noise reducer;
• There shall be a visual indication of the presence of an audio signal, PTT and opening of noise reducer.
Audio-frequency path shall meet the following parameters:
• Nominal impedance: 600 Ohm (bal.);
• Amplitude frequency response ripple: + 1 / - 3 db in a range of 300 Hz to 3.4 KHz;
• Total harmonic distortion: < 0.5%;
• Input signal: –30 dbm to +10 dbm with impedance of 600 Ohm;
• Output signal: 0 dbm ± 1.5 db with impedance of 600 Ohm;
• Microphone jack of a dynamic microphone: 1 mv (± 20 db) with impedance of 200 Ohm;
• Headset output signal: 2V max;
• In-built speaker output signal: ≥ 2 with impedance of 8 Ohm, adjustable;
• External speaker output signal: ≥ 5 with impedance of 8 Ohm, adjustable.
Power supply: 230 V AC network – 10 % /+ 15 %, from 47 Hz to 63 Hz.
There shall be reserve power supply to ensure uninterruptible operation of the equipment.
The HF antenna system shall meet the following requirements:
• RF connectors shall be N type jack;
• The antenna system operating frequency range shall be at least 1.5 - 30 MHz;
• The antenna system shall form a 360˚ radiation diagram (omnidirectional);
• The antenna system impedance shall be 50Ω (coaxial, unbalanced, (asymmetrical);
• Absolute gain shall be at least 2 dBi (0 dBd);
• VSWR shall be < 1.5;
• Environmental protection class shall be not lower than IP65.
The supplier shall propose the most suitable antenna type and polarisation which would
ensure meeting the operational requirements.
Antenna design shall allow its installation at the HF airfield site (transmission centre) and
ATCT rooftop (receiver centre).
The maximal input power of antenna element shall be at least 500 W
Antenna lightning protection shall be provided.
The backup radios to be supplied shall be a multiband transceiver design, capable of being tuned to
multiple frequencies across the aviation band in the range of 1.5 - 30 MHz.
The quantities of HF multiband transceivers to be supplied as part of this as part of this Tender are
listed in Table 3.4-2.
The backup HF multiband transceivers shall be capable of being preset to common aeronautical HF
frequencies with the pre-sets easily activated by operators.
The backup HF multiband transceivers shall be capable of rapid changes of channel frequency other
than those that have been preset by use of controls on the front panel.
The backup HF multiband transceivers shall have an LCD front panel for local controls, a Built–in
speaker and a telephone. In his technical response, the supplier shall include details of the audio input
and output audio devices including frequency response information.
The backup HF multiband transceivers shall be capable of accepting the connection of headsets (that
incorporate PTT and receiver) to the unit.
The backup HF multiband transceivers shall operate separate from the VCCS
The backup HF multiband transceivers shall be capable of being connected to the VRRS (Voice
Recording and Replay System) located in the Equipment room, via Ethernet digital or balanced
analogue audio circuits.
Note: The connection in the final design will depend on the recorder and radio
hardware proposed.
The backup HF multiband transceivers shall have BITE monitoring
The backup HF multiband transceivers shall be supplied with batteries and charging system offering
back-up supply to equipment for duration of at least 24 hours.
The charging system shall be capable of sensing battery charge requirements and on a continuous
trickle charge to ensure that batteries are kept fully charged.
The charging system should have a communication port, preferably Ethernet, that can be connected to
the CMS installed in the equipment room for alarms and monitoring/
As part of the installation, the original existing batteries and charging system shall be replaced by the
Supplier with maintenance free GEL Cell or AGM type (non-gassing) installed in battery racks.
The connection from the HF radio site on the airfield to the Technical Block shall reuse to the possible
extent the existing Microwave link equipment currently deployed.
Note: No upgrade or replacement of this equipment is envisaged, except as needed
for minor components such as cables, appropriate antenna mast, with mounting
and grounding kits
The transceivers and multiplexers deployed in the current Technical Block shall be
appropriately reinstalled in the Equipment Room of the New Technical Block to connect all
HF audio channels and Remote control and monitoring system (RCMS) signals with
Microwave link and distribute them from the distant radio site on the airfield to the
equipment room of the Technical Block.
The MW-Link antenna deployed on the roof top plan of the current ATC Tower shall
beappropriately reinstalled on the roof top plan of the New ATC Tower.
Connection cables, appropriate antenna mast, with mounting and grounding kits shall be
part of deliverables as necessary.
The Remote control and monitoring system of the Microwave link shall display current
overall system status on the Technical Supervisor position in the Supervision Room of the of
the New Technical Block.
Radio units (transmitters, receivers and transceivers) shall support at least the following protocols:
• SIP, RTP for VoIP in accordance with requirements of EUROCAE ED-137 Rev. B;
• TCP/IP (for control and monitoring); and
• IPv6/IPv4.
Radio units (transmitters, receivers and transceivers) shall have the following controls on its front panel:
• On-off switch;
• LED power indicator;
• LED indicator of transmission mode (carrier frequency);
• LED noise reducer indicator;
• LED warning indicator;
• Keyboard for local control;
• Alphanumeric display to display operating frequency, modulation index, voltage
standing wave ratio (VSWR), output power, temperature.
The Mean time to failure of the offered HF radios shall be more than 50,000 hours.
The HF radios shall function for a minimum of 10 years without other changes than those resulting from
normal use
The HF radios, considered as a whole system, shall be designed and constructed so that it shall not
require maintenance more frequently than every 8760 hours.
Embedded software shall be updated using local interface of the radio unit (transmitter, receiver and
transceiver) and remotely via Ethernet.
The radios shall have the following audio interfaces:
• Transmitter audio input; and
• Receiver audio output.
Radio transmitters and receivers shall have the following interfaces:
• Coaxial unbalanced antenna and feeder transmission line (antenna-feeder path) withwave impedance
of 50 Ohm;
• Microphone (handset) jack with PTT option (PTT button) and a PTT switch;
• Ethernet interface for VoIP mode and connection of a Remote Control and Monitoring System
(RCMS).
• Interface for technical maintenance and configuration on the front panel of radio station.
• Radio transmitters and receivers shall allow for concurrent operation of analogue interface Ear and
Mouth (E&M) and VoIP.
The line input on transmitters (AF input) shall be designed for a direct connection to communication
lines – 600Ω balanced at a nominal level (between -30dBm and +10dBm adjustable by 1dBm steps)
The line output on receivers (AF output) shall be designed for a direct connection to communication
lines – 600Ω balanced at a nominal level (between -30dBm and +10dBm adjustable by 1dBm steps)
For the purpose of legal recording each transmitter and receiver shall have a dedicated 600Ω recording
output.
Radios shall be able to operate using contact signalling for PTT activation and Squelch indication.
Dedicated connections shall be used for contact signalling for PTT and Squelch activation operation.
The contact interfaces shall be over-voltage and over-current protected.
Transmitters shall be capable of both local and remote keying. In order to enable remote keying, a PTT
activation contact interface shall be available.
The PTT activation signal shall be sent via:
• Copper cable (up to 2000m long, 0.6mm wire diameter) directly from the VCCS system;
• Signalling lead of the E&M 4 wire analogue audio interface; and
• Configurable tone keying from 1800 to 3000 Hz.
A relay contact outside the transmitter closing a circuit to earth shall key the transmitter
The time delay between the activation of the relay and full power shall not exceed 20 ms
Spark suppression/overvoltage protection devices shall be provided in the transmitter
Each receiver shall have a squelch indication interface, which shall enable systems connected to this
interface to track when a squelch circuit on the receiver is closed
The squelch indication signal shall be available for the control of the frequency from external systems
(e.g. VCCS). Therefore, when the squelch opens, an insulated relay contact shall close a circuit to earth.
The squelch indication signal shall be transmitted to the VCS system via a single wire (a contact in the
receiver closing a circuit to ground shall indicate squelch).
The squelch indication signal shall be sent to VCCS systems via:
• Copper cable (up to 2000 m long, 0.6 mm wire diameter) directly to VCCS system; or
• Signalling lead of the E&M 4 wire analogue audio interface; or
• Configurable squelch tone signalling from 1800 to 3000 Hz.
In order to enable monitoring and control of data exchange with the RCMS system, each radio shall
have a dedicated RS232 or RS422 interface.
In order to enable local configuration of the radio equipment, each radio shall have a dedicated RS232
or USB interface.
It shall be possible to perform radio diagnostics and change radio equipment settings with the local
PC/notebook maintenance software connected to the radio external connector(s).
To enable connection to the VCCS, each radio shall have a dedicated integral Ethernet interface for VoIP
according.
To enable RCMS connection between radio devices and RCMS, each radio shall have a dedicated
integral Network interface with the SNMP protocol.
It shall be possible to configure the radio to support simultaneous audio (SIP/RTP) and remote control
(RCMS) via IP.
To enable connection to the VCCS via IP all the radios shall be connected to the dedicated IP network
equipment.
To enable connection to the SWR monitor, each radio shall have a dedicated optoisolated interface or
TTL interface.
In order to enable monitoring of the external devices (e.g. Power supply), each radio shall have a
dedicated optoisolated interface or TTL interface.
To enable the Main/Standby antenna relay changeover, each radio shall have a dedicated relay
interface.
RF interfaces shall be used for connecting antennas to radios.
The impedance of the F interfaces shall be 50Ω, unbalanced
RF input and output connectors shall be a coaxial type N female
Transmitters shall not be damaged if the F interface is open (Z=∞) or short circuited (Z=0).
Protection against mismatch shall be provided and damage due to any type of mismatch
shall be prevented.
The radio equipment shall have suitable secondary protection against lightning currents that might
enter the radio despite the use of quarter wave lightning protectors on the antenna port and gaseous
lightning arrestors on the line connections. AS/NZS 1768-1991 refers.
The HF radio system shall be suitable for continuous operation in a tropical environment without
adjustment while meeting the requirements of this specification and be capable of withstanding
temperatures in the range of -10 to +50 degrees Celsius and relative humidity to 95%, with high levels
of wind-borne coastal sea salt concentrations.
The Supplier is to specify the method of cooling. If cooling fans are used to circulate air within the
equipment chassis, ideally these should be thermostatically controlled.
Where cooling fans are supplied these should be monitored.
Cooling system failure shall not critically affect operation of the equipment.
The Supplier shall assess electromagnetic compatibility at the installation site and ensure that spurious
electromagnetic radiation of the installed equipment in the range from 0 to 3 GHz does not interfere
with other radio electronic and communication equipment. The supplier shall describe the
methodology of electromagnetic compatibility assessment
The Supplier shall guarantee that there will be no mutual interference of the installed HF and VHF radio
communication equipment and propose an optimal solution for the placement of antenna systems.
The Supplier shall provide a preliminary calculation of electromagnetic compatibility to ensure
operation of the equipment without interference. The Supplier shall update its calculations on
electromagnetic compatibility during the contract implementation phase.
The equipment shall be connected to protective ground.
The equipment shall be connected to the existing grounding system of the Customer’s facility.
The protective ground shall comply with current safety regulations.
The ethernet switch shall have redundant power inputs.
The input voltage of ethernet switch shall be at least in range 12 - 45V DC.
The ethernet switch shall have the following alarm contact - 1 relay output with current carrying
capacity of 1 A @ 24VDC.
The operating temperature of ethernet switch shall be at least -0 to +60˚C
All telecommunication cabinets shall be designed for housing the 19” equipment.
All telecommunication cabinets shall be prepared for connecting all equipment to the AC and DC power
supply
All telecommunication cabinets shall have an AC and DC power distribution panel with individual fuses
dedicated for every device.
All telecommunication cabinets shall have all necessary cabling for the connection of all radio
equipment; audio cables, Ethernet cables, data cables, RF cables, grounding cables.
The cabinet shall have a lockable rear door that restricts unauthorised access to the rear AC and DC
distribution.
In case that the telecommunication cabinet has front doors it shall be transparent so that the radio
equipment is visible.
To minimize the radio equipment accidental switch off, a power on/off button shall be mechanically
protected.
The cabinet front unused spaces shall be fitted with blank 19“panels.
To establish communication between VCCS/CWP and radio equipment via IP protocol, all
telecommunication cabinets shall be equipped with all necessary IP equipment.
The DC power system shall be provided to support operation of radios in the absence of primary AC
power. The changeover from AC to DC and reverse (after re-establishing an AC power source) shall be
automatic and immediate and shall have no effect on the operation of the radios or their control and
monitoring systems.
The performance of the radios shall not be degraded for unlimited periods with the supply voltage
variation as specified.
Duplicated equipment elements shall be powered and fused separately.
The DC backup power supply system shall provide the autonomy of all operational Tx/Rx radios for 12
hours.
Duplicated DC/DC convertors shall be provided for insurance of nominal voltage stability for delivered
equipment.
It is expected that the supplier shall perform the installation without interruption of the existing
communication system.
Equipment shall be mounted in 19" cabinets or racks (42U).
• Racks, cabinets, consoles installed in the same room shall have comparable size and appearance.
• Equipment in racks and cabinets shall be positioned so that all devices and subunits are fully
accessible. If necessary, retractable and tilting constructions shall be used.
• Special tools shall be provided for each rack and cabinet to remove devices.
• Supplier shall provide card expanders, cable extenders, safety and protection devices if necessary.
