Receiver I/O Connections; Pin Connector; Frequency Programming - RF Technology Eclipse Series Operation And Maintenance Manual

3 RECEIVER CONNECTIONS

3 Receiver I/O Connections

3.1 25 Pin Connector

The D-shell 25 pin connector is the main interface to the receiver. The pin connections are
described in table 3.
Function
DC Power
Channel select
RS232 Data
600 Ohm Line
150 Ohm/Hybrid Access
Discriminator Audio
Direct Audio Output
Audio Ground
Sub-Audible Audio Output
Carrier Operated Switch
External Squelch
Table 3: Pin connections and explanations for the main, 25-pin D-shell Connector

4 Frequency Programming

Channel and tone frequency programming is most easily accomplished with RF Technology
TecHelp/ Service Monitor 2000 Software. This software can be run on any IBM compatible
PC and provides a number of additional useful facilities.
TecHelp/ Service Monitor 2000 allows setting of the adaptive noise squelch threshold,
provides a simple means of calibrating the signal strength output and minimum signal alarm
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RF Technology R800
Signal Pins
+12Vdc 1,14
0 Vdc 13,25
1
2
4
8
10
20
40
80
In
Out
High
Low
Disc
Audio
Agnd
Tone
COS+
COS-
Ext Sq
3.1.25 Pin Connector
Specification
+11.4 to 16Vdc
21 BCD Coded
9 0 = Open Circuit
22 or 0 Vdc
10
23 1 = +5 to +16Vdc
11
24
12
15 Test and Programming use
2 9600, 8 data 2 stop
20 Transformer Isolated
6 Balanced 0 dBm Output
7
19
18 AC coupled, unsquelched
17 Direct AC Coupled Audio
5 Direct Audio Ground
4 Unsquelched, 1-250 Hz
3 Opto-coupled Transistor
16 Switch (10mA)
8 <1 Vdc to Squelch
>2 Vdc or open ckt to
unsquelch
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