Main Unit - Standard Horizon Quest GX1255S Service Manual

TX: 0.8 V
RX: –8.0 dBµ
TX HI: 2.9 V
TX LOW: 2.1 V
TX: +18.0 dBm
TX: 4.7 V
TX: 0.7 V
TX HI: 5.7 V
TX LOW: 4.2 V
TX: 1.6 V
TX HI: 6.2 V TX HI: 1.4 V
TX LOW: 0.9 V TX LOW: 0.3 V
TX: 0 V
RX: 5.0 V
TX HI: 4.0 V
TX LOW: 0.6 V
TX: 0 V
RX: 5.0 V
RX: –10.6 dBµ
RX: 7.7 V
RX: 1.9 V
RX: +3.0 dBµ
RX: 1.2 V
RX: 0.5 V
RX: +10 dBm
RX: 4.4 V
TX: +10 dBm
TX: 4.4 V
7.3 V
3.6 V
5.8 V
0.9 V
TX HI: 1.3 V
TX LOW: 0.2 V
+10 dBm
TX HI: 0 V
4.8 V
TX LOW: 5.0 V
RX: 5.0 V
2.4 V
8.0 V
4.3 V
2.3 V
5.0 V
TX: 8.0 V
RX: 0 V
TX: 5.0 V
RX: 0 V
4.8 V
ì
ï
PLL DATA "H": 5.0 V
í
PLL DATA "L": 0 V ï
î
TX: 0 V
RX: 8.0 V
RX: –7.0 dBµ (21.4 MHz)
RX: 7.5 V
RX: 1.2 V
RX: 4.7 V
RX: 7.9 V
RX: 0.5 V
RX: +10.0 dBµ (21.4 MHz)
RX: +6.0 dBµ (21.4 MHz)
RX: 5.5 V
RX: 600 mVp-p
@ STD.MOD.
3.6 V
6.8 V
RX: 0.8 V
0.6 V TX: 7.3 V
7.3 V
AF MUTE "ON": 0 V
AF MUTE "OFF": 5.0 V
UNLOCK: 4.0 V
1.6 V
1.6 V

MAIN Unit

Circuit Diagram
RX: 1.0 V
SQL ON: 4.8 V
SQL OFF: 0 V
RX: 5.2 V RX: 5.1 V RX: 5.5 V
RX: 1.0 V
RX: 0.7 V
RX: 5.5 V
RX: 4.3 V
RX: 5.4 V
RX: 5.2 V
RX: 2.6 V
RX: 2.9 V
RX: 2.3 V
RX: 400 mVp-p
@ STD.MOD.
DSC DATA "H": 4.8 V
DSC DATA "L": 0 V
RX: 200 mVp-p
@ STD.MOD.
3.6 V
2.5 V
2.5 V
1.5 V
0.9 V
1.6 V
1.6 V
6.5 V
1.3 V
4.6 V
MUTE "ON": 5.0 V
MUTE "OFF": 0 V
1.6 V
1.6 V
2.0 V
1.6 V 1.6 V
1.6 V
1.6 V
1.6 V
MIC MUTE "ON": 0 V
MIC MUTE "OFF": 5.0 V
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