Pin Connector - RF Technology Eclipse Series Operation And Maintenance Manual

3.1 25 Pin Connector

Condition
No DMTX board
DMTX board connected 2-3, 4-5
In addition to the jumper changes, a wire link or zero ohm resistor must be connected in the
place marked for R159.
3 Tr ansmitter I/O Connections
3.1 25 Pin Connector
The D-shell 25 pin connector is the main interface to the transmitter. The pin connections are
described in table 3.
Function
DC power
Channel Select
RS232 Data
600Ω Line
150Ω / Hybrid
Direct PTT input
T/R Relay driver output
Sub-Audible Tone Input
High-Z Audio Input
External ALC input
Table 3: Pin connections and explanations for the main 25-pin, D connector.
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RF Technology T800
Position
1-2, 5-6*
Signal Pins
+12 Vdc 1, 14
0 Vdc 13, 25
1 21
2 9
4 22
8 10
10 23
20 11
40 24
80 12
In 15
Out 2
High 20
Low 6
7
19
3
16
[+] 5
[-] 18
[+] 4
[-] 17
8
3 TRANSMITTER I/O CONNECTIONS
Specification
+11.4 to 16 Vdc
Ground
BCD Coded
0 = Open Circuit
or 0 Vdc
1 = +5 to +16 Vdc
Test and Programming use
9600, 8 data 2 stop bits
Transformer Isolated
Balanced 0dBm Output
Ground to key PTT
Open collector,250mA/30V
>10kΩ, AC coupled
(1-250Hz)
>10kΩ, AC coupled
(10Hz-3kHz)
<0.5V/1mA to obtain
>30dB attenuation, O/C
for maximum power
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