37
Installing the Antenna
Description, Specifications, and Installation Manual
600 Ohm I/O Connections (JP8 on the UVRI-B Control board)
Control Connections
Use terminal block JP8 on the UVRI-B control board for making connections to 600 ohm
balanced audio equipment such as a direct connection to an or other type of
control and status monitoring equipment. To use the 600 ohm input for control signal
audio, place a jumper across pins 2-3, (600 Ohm RCV), of JP11 and across pins 2-3, (TX
Audio), of JP12. Jumper JP2 (the VOX) to provide carrier detect while the incoming
audio is present. The 600 ohm input can receive audio for control and audio amplification
as well as transmit reports to an external unit.
Use a twisted pair wire run to the connecting equipment which should have a balanced
600 Ohm output. Keep the cable length as short as possible and run away from sources of
electrical noise. The input works best with an input level between 200 to 2,000 mVpp. At
200 mVpp, turn pot R59 (RX1 Level) fully up, 20 turns clockwise. Set the level so that a
tone signal from the connected equipment provides 1 Vpp at TP2 or until the two green
LEDs of the RX Level meter are on.
Audio Connections
Connect the optional remote audio input for Public Address to the 600 ohm port on the
UVRI-B control board (JP8) with jumper JP11 set for 600 Ohm PA, pins 1 & 2, and no
jumper on JP12. A contact closure for remote PTT is required between JP24 pins 6 and 1
to activate the 600 ohm.
Use a twisted pair wire run to the connecting equipment which should have a balanced
600 Ohm output. Keep the cable length as short as possible and run away from sources of
electrical noise. The input works best with an input level between 200 to 2,000 mVpp. At
200 mVpp, turn pot R59 (RX1 Level) fully up, 20 turns clockwise. Set the level so that a
tone signal from the connected equipment provides 1 Vpp at TP2 or until the two green
LEDs of the RX Level meter are on.
Turning on the Power
To turn the power on:
1. Verify all wiring is completed in the previous sections and that the connections are
tight and secure.
2. Connect the battery supply wires to the control board with the pluggable connector at
JP36. After the battery connections and antenna connections are made and the battery
disconnect connector is plugged in, the UVRI-B is running on battery power.
3. The UVRI-B control board clock LED begins to blink approximately 3 seconds after
power is applied.
4. Connect AC power and verify that the battery charger LEDs turn on indicating the
charger is charging the batteries.
5. Turn on the radio transceiver power (if applicable) and verify the radio power LED
turns on.
