2-6
2.3
REMOTE OPERATION SET UP - Line Interface Boards
The Procedures listed below enable the user to custom configure the unit for external remote
control hardware. Refer to Table 2-1 for connector pin details on Remote Control D Connector
located at rear of Base Station or Table 2-2 for connector pin out on the special order Positronics 9-
pin connector. Position jumpers on Line Interface Board as indicated Figures 2-2 or 2-3 as required.
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 b10 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 2-1 9-Pin "D" TYPE CONNECTOR FUNCTIONS
PIN
NO
Two Wire Line Interface Boards
P/N 943180-1
PIN
NO
Four/Two Wire Line Interface Board
P/N 923051-1
8,9
6
2
7
3
1
4,5
2 Wire Remote TX/RX Audio(600
Ω
)
Ground
RF Indicator
Squelch
External PTT
AGC
Not Connected
8,9
4,5
6
2
7
3
1
4 Wire Remote TX Audio or
2 Wire Rx/Tx Audio (600
Ω
)
Remote RX Audio Line (600
Ω
)
Ground
RF Indicator (Optional)
Squelch
External PTT
AGC
NOTE:
A modular RJ-11 Jack is also provided on the rear of the chassis (on later units) 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 8 and 9 on the 9 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.
