User's Manual

© RF Technology 2007
Down – Press this button to decrease the speaker volume
Left – Press this button to change channel to next lower programmed number
Right – Press this button to change channel to next higher programmed number
Reset – The reset switch mounted inside base station, used for reset the
transceiver without power cycle, use a small pin (e.g. paper clipper) to
access this switch
2.1.1.2 Indicators:
Power – This LED (on) indicates that DC power supply is applied to the transceiver
Digital – This LED (on) indicates that the transceiver is operating in Digital mode
Analog – This LED (on) indicates that the transceiver is operating in Analog mode,
- if the transceiver is operating in dual mode, both Digital and Analog LED
will be on
Tx – This LED (on) indicates the transceiver’s transmitting path is active
Rx – This LED (on) indicates the transceiver’s receiving path is active
Alarm – This LED (flash) indicates the transceiver is in alarm state, press the
status button to listen the alarm information
2.1.1.3 Connectors:
Microphone – RJ45 connector for front-panel microphone input
USB – USB (type A) connector for connecting host PC via a standard USB cable
to monitor or program the transceiver
2.1.2 Rear Panel Connectors
2.1.2.1 System I/O:
The male D shell, 25-pin connector is the main interface to the transceiver. The pins of
the connection are described in table 1.
Pin No. Description Specification
1, 4 Power supply, positive Input: +13.8VDC
(minimum 10.8V, maximum 16V)
13,25 Power supply, negative Input: Ground
2 System serial bus, Data out Output: +3.3V TTL logic
15 System serial bus, Clock Output: +3.3V TTL logic
3 Exciter PTT input
Input: Low active level ≤ +2.5V)
16 Receiver COS output Output: open collector, Imax = 100mA
4 AUX audio input Input: unbalanced 4.7kohm, DC to 3000Hz
5 AUX audio output Output: unbalanced 4.7kohm, DC to
3000Hz
8, 17 Audio signal ground Input: ground
6 Line input + Input: balanced 600ohm,
300 to 3000Hz, -20dbm to +10dbm
19 Line input - Input: balanced 600ohm,
300 to 3000Hz, -20dbm to +10dbm
7 Line output + Output: balanced 600ohm,
300 to 3000Hz, -20dbm to +10dbm