GAI-Tronics MRTI 2000 (No. PL1877A) Microprocessor Radio Telephone Interconnect Installation & Service Manual - Manual (Page 159)

PL1877A Microprocessor Radio Telephone Interconnect PL1877A – Radio Installation
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T1600 Series Remote Interfacing
In this mode of operation, the PL1877A normally operates in the enhanced VOX simplex mode.
Receiver audio is used as the receiver carrier source. Connect the PL1877A radio cable to the remote as
follows:
Radio Cable Interfacing
Color Function Terminal
Green/white Receive audio high 13
Black/green Receive audio low 12
Blue/white Transmit audio high 28
Blue/black Transmit audio low 27
White PTT 15
Green PTT return 1
Orange Monitor (rec PL disable) 19
Yellow Monitor return 1
Blue Receive carrier indicate n. c.
Red/black Transmit PL disable n. c.
Red Transmit PL disable return n. c.
#12 black ground Logic/lightning ground 1
It is recommended to use the optional ac transformer and cable on remote installations. Install the ac
power connector into the 5-pin DIN connector (DC PWR), on the rear panel of the PL1877A.
Required Parameter Settings – Using the “Parameter Modification Procedure” section of this manual
set the following parameters:
Parameter Setting
1 0 (de-emphasis)
2 1, JU202 IN (high level speaker audio)
3 0 (internal carrier detect)
4 Don’t care
5 1 (RX audio VOX for carrier detect
6 Don’t care
7 Don’t care
9 1 (simplex)
10 0 (active low PTT sense input
70 1 (enhanced VOX, requires enhanced VOX option