User's Manual

2-8
2.4 REMOTE OPERATION SETUP
The Procedures listed below enable the user to custom configure the unit for external
remote control hardware. Refer to Table 2-3 for connector pin details on Remote Control D
Connector located at rear of Single Channel Transceiver. Position Jumpers on Control board
as indicated in Table 2-4 or Table 2-5 as required. Refer to Figure 2-3 and Figure 2-4 for
board locations. Verify Remote Control operation in accordance with manufacturers
instructions.
TWO WIRE SETUP - In two wire operation, a single balanced 600 ohm pair is provided for
transmit and receive audio. The transmitter can be keyed on the same pair or externally.
FOUR WIRE SETUP - In four wire operation, separate balanced 600 ohm pairs are provided
for transmit and receive audio. The transmitter can be keyed on the Tx audio pair or
externally.
DC KEYING - In ± DC keying, a positive voltage between +10 Vdc and +48 Vdc or
negative voltage between -10 Vdc and -48 Vdc will key the transmitter. A DC voltage
between -5 Vdc and +5 Vdc will not key the transmitter.
TONE KEYING - In Tone keying a tone of 2175 Hz or 2380 Hz (Optional) can be used to
key the transmitter. Tone sensitivity is adjustable from -40 dBm to 0 dBm.
GROUND KEYING - In Ground Keying the transmitter is keyed by shorting the control point
(landline or External Keying) to chassis ground
CURRENT LOOP KEYING - In Current Loop keying, an internal or external current source
(15 mA) is used to key the transmitter
EIA TONE KEYING - The EIA multi-tone keying format is found in the Land Mobile Industry.
A high level 2175 Hz tone followed by a 1950 Hz guard tone then a low level 2175 Hz
continuous tone is utilized to key the transceiver.
TABLE 2-2 REMOTE CONTROL CONNECTOR FUNCTIONS
9 PIN
NO
25 PIN
NO
Connector Pin Functions
A,B
C,D
N/A
K
J
N/A
E(-),F(+)
N/A
N/A
9,21
10,22
8
13
1,2,14,15
25
23(-),11(+)
20
3,4,5,6,7,16,17,
18, 19
4 Wire Tx Audio Line or 2 Wire Rx/Tx Audio Line (600 S)
4 Wire Rx Audio Line (600 S)
AGC
Single Line Keying (PTT)
Ground
Squelch
Carrier Control
RF Indicator
Not Connected, allocated for future functions
NOTE: A modular RJ-11 Jack is also provided on the rear of the 19" rack chassis for quick
connection to the 2 wire, Tx/Rx Audio. The red and green wire connections (centre pins) on the
RJ-11 are connected parallel to pins 9 and 21 on the 25 pin connector. This RJ-11 jack CANNOT
be used if the remote control card is set to 4-wire operation as it does not have the necessary
connections.