Place the 2 Philips head screws supplied into the centre two screw holes as shown remembering to hold the screws in place. While holding one of the screws in with an appropriate Philips head screw driver use a shifter to tighten the supplied nut. Repeat with second screw.
Now loosen 2 of the black thumbscrews located on the top of the display vehicle adapter. Once these have been loosened push the loosened cradle slide up as high as possible.
To insert the LCD unit into the adapter, place the bottom of the LCD unit into the display vehicle mount bracket. Next push the top of the display into the bracket, push the cradle slide down and tighten the black thumb screws.
The removable display vehicle mounting bracket is now ready to be mounted at the required position.
PRC-2090 Docking Station – Rear Panel B C D E A F I H G Connector Name A CW B Speaker C ESU D ATU E RF F Ground Lug G Linear Interface H Auxiliary Interface I Power Connector 263 of 285
PRC-2090 Docking Station – Rear Panel Connector Pin Outs ESU/CW Socket 6 pin waterproof panel mounted socket Pin Name Description of function Level 1PPS 1 PPS from External Syncronisation Unit (ESU) TTL B NMEA + NMEA data input +5VDC C +5 +5V for ESU power +5VDC D CW key CW key input Active low 0V E Gnd Ground Ground 0V F N/C Not connected A 264 of 285
ATU Connector 6 pin waterproof panel mounted socket Pin Name Description of function Level A Gnd Ground Ground 0V B NC Reserved C NC Reserved D Scan/Tune Output - Initiate preamp. Active Low E Tuned Input - Tune result. Low - Succesful F +13V8 Fused Fused 13.8VDC output +13.
Linear Amplifier Interface Socket 15 pin waterproof panel mounted socket A M L K B R J C P N H D E F G Pin Name Description of function Level A +13V8 Fused Fused 13.8VDC output +13.
Auxiliary Socket 15 pin waterproof panel mounted socket A M L K B R J C P N H D E F G Pin Name Description of function Level A +13V8 Fused Fused 13.8VDC output +13.
Power Connector 2 pin waterproof panel mounted socket Pin Name Description of function Level A +13V8 Vin 13.8VDC input +13.
2019 Automatic Tuning Mobile HF Antenna - Barrett P/N 2019-00-10 The 2019 antenna plugs directly into the “ATU” and “RF” connectors located on the rear of the PRC-2090 docking station using the cables supplied. Important:- PRC-2090 transceivers must have the 2019 antenna option set during programming.
Mounting the Barrett 2019 Automatic Tuning Mobile HF Antenna The Barrett 2019 antenna should be mounted in positions similar to those illustrated in the diagrams on the following pages. Select a position free from excessive vibration. A bracket, fabricated to withstand the forces and vibration that can be expected during off-road driving, should be used to mount the antenna to the vehicle.
271 of 285
Typical Military Vehicle Mounting Example Caution:- Whilst the 2019 automatic tuning mobile HF antenna is designed to withstand vibration to military specifications on tyred vehicles, some mounting positions on large prime-movers, particularly front mounted bull bars, are subject to vibration that far exceeds this specification. Do not mount the 2019 antenna in positions such as these as damage to the antenna may result.
Antenna Assembly Mounting the Base Spring The base spring should only ever be hand tightened, if a tool is used it may damage the spring base.
Mounting the Whip Sections To mount the whip section it is recommended that only one section of the whip is screwed onto the antenna at a time. The whip section should be hand tightened fully then a suitable tool (ie: a spanner) can be used to tighten the section a further 10 to 20 degrees clockwise while holding the antenna body with a free hand.
Testing the Barrett 2019 Automatic Tuning Mobile HF Antenna To test the Barrett 2019 antenna, first select the lowest transmit frequency in the transceiver and press the TUNE key. The display should show the word “Tuning” for a few seconds, followed briefly by “Tune Passed” and an indication of the measured VSWR (Voltage Standing Wave Ratio) value. Check this reading against the VSWR meter.
910 Automatic Tuning Mobile Antenna - Barrett P/N BC91000 The 910 antenna plugs directly into the rear of a PRC-2090 fitted into the PRC-2090 Vehicle docking station or the PRC-2090 Base docking station transceiver using the cables supplied. Important:- PRC-2090 transceivers must have the 910 antenna option set during programming. The 910 antenna should be mounted in positions similar to those illustrated in the diagrams below. Select a position free from excessive vibration.
Caution:- Whilst the 910 automatic tuning mobile antenna is designed to withstand vibration to military specifications on tyred vehicles, some mounting positions on large prime-movers, particularly front mounted bullbars, are subject to vibration that far exceeds this specification. Do not mount the 910 antenna in positions such as these as damage to the antenna may result.
A good earth (ground) to the main body of the vehicle is essential for efficient operation of the antenna. To achieve this clean all joints to bare metal and use copper braid earth straps if any non-metallic joints are encountered. After mounting the main body of the antenna, screw the black coil onto the antenna body followed by the stainless steel whip. Note:- Some models of the 910 antenna have a one piece spring and a stainless steel whip in place of the coil and whip.
The antenna is supplied with a pre-terminated 1.5 metre cable tail. This should be routed into either the engine compartment or boot (trunk) of the vehicle. A 6 metre pre-terminated extension cable is supplied to connect the antenna to the transceiver (this cable may be extended to 12 metres by use of another extension cable). If the joint between the antenna stub cable and the extension cable is in an exposed position, a butyl rubber self amalgamating tape should be used to seal the joint.
Overview of HF Operation HF (High Frequency) is the radio spectrum with frequencies between 1.6 and 30 MHz. Within this radio spectrum an efficient form of transmitter modulation, SSB (Single Side Band), is used.
Radio Wave Propagation Illustrated The following illustrations show the characteristics of ground-wave and sky-wave propagation during day and night time. In each illustration the height of the ionosphere above the ground is shown. In both illustrations Station A communicates with Stations B, C and D. Propagation from Station A to B is by ground-wave. The diagrams illustrate that the ground wave is not affected by the time of day and the height of the ionosphere above the ground.
Night The sun is lower, ionosphere is lower, best frequency to use is lower A to B - Possible optimum working frequency is 3 MHz A to C - Possible optimum working frequency is between 5 - 7 MHz A to D - Possible optimum working frequency is between 9 -12 MHz Factors Which Affect HF/SSB Communications There are a number of different factors which will affect the success of your communications via HF/SSB radio.
(Refer to Selcall (Selective Call) section of this manual for full details on Beacon Call operation.) Time of Day As a rule, the higher the sun, the higher the frequency that should be used. This means that you will generally use a low frequency to communicate early morning, late afternoon and evening, but you will use a higher frequency to cover the same distance during times when the sun is high in the sky (e.g. midday).
Limited 3 Year Warranty Barrett Communications Pty Ltd provides a maximum three year warranty on all equipment it manufactures which is to be used expressly for high frequency, single sideband radio communications. This warranty covers faults arising from defects in design, workmanship or materials. Please note that this warranty does not cover batteries. As the Barrett PRC-2090 Tactical HF Radio System is fully immersible to 1 metre, it is imperative that the transceiver is not opened.
Warranty Registration and Customer Support Thank you for purchasing Barrett HF communications products. The standard and automatic warranty on Barrett products is one year. By completing the registration form on the next page and sending it to us by mail, fax or email, this warranty will be extended to a total of three years at no extra cost.
