Operating instructions

TRANSMITTER Jumper Options
JP2- EPROM Type
Position
27C256 2-3 * 27C64 1-2 JP3 - 600 Ohm Line dc Loop PTT Input Position
dc Loop Connected 1-2 *
dc Loop Not Connected 2-3 JP4 - Audio Input Source Selection Position
600 Ohm Line Input 2-3 *
Hi-Z Balanced Input 1-2 JP5 - 600 ohm Audio Terminator Position
Terminated 600 Ohm 1-2 *
Not terminated 2-3 JP6 - Input Level Attenuation Position
0 dB 1-2 *
20 dB 2-3 JP7 - Audio Frequency Response Position
750 uSec. Pre-emphasis 1-2 *
Flat Response 2-3 JP8 - Subaudible Tone Source Position
Internal CTCSS 1-2, 4-5 * External Input 2-3, 5-6
JP9, JP10, JP11 dc Loop PTT Input Configuration (JP3 1-2) JP9 JP10 JP11 Current Loop input ON OFF OFF * +12 Vdc Loop Source OFF ON ON THE FOLLOWING JUMPERS ARE VALID ON TX PCB VERSION 30/9103/0009 OR LATER JP16 –(see also JP22) DCS and low frequency Digital Data Input Position DCS Not selected JP16 1-2 * Select DCS input JP16 2-3 JP22 – (see also JP16) Tone input or DCS Digital Data Input Position Tone- input JP22 fitted 1-2 *
DCS input JP22 removed open
JP17 – Bypass Tone circuit 250Hz low pass filter Position Default - Link not fitted JP17 open* Bypass active JP17 fitted 1-2 JP19 – LED Alarm output Position No alarm output 2-3 * Alarm - active low output at DB25 pin 7 1-2 JP23 – DMTX Digital and audio modulation option Position Audio modulation only 1-2, 5-6 * DMTX fitted for Digital and Audio modulation 2-3, 4-5
* = Standard Factory Configuration