Main Unit - Vertex Standard VX-820 Series Service Manual

–7.6 dBµV emf
RX: 7.4 V
@156.1 MHz
TX: 6.9 V
RX: 0 V
TX: 0.8 V
PWR ON: 0 V
PWR OFF: 6.7 V
RX: 7.4 V
PWR ON: 7.4 V
TX: 7.1 V PWR OFF: 1.1 V
TX: 7.1 V
RX: 7.4 V SAVE ON: 0 V
TX: 6.7 V SAVE OFF: 4.8 V RX: 0 V
RX: 4.7 V
TX: 0 V
TX: 5.0 V
TX: 4.3 V
RX: 4.8 V
TX: 0.1 V
RX: 0.1 V
TX: 3.4 V
SAVE ON: 0 V
7.4 V
SAVE OFF: 3.4 V
TX: 0 V
PWR ON: 5.0 V
PWR OFF: 0 V
PWR ON: 1.7 V
SW ON: 0 V
PWR OFF: 0 V 3.5 V
SW OFF: 3.5 V
3.5 V
3.5 V
–9.5 dBµV emf
@156.1 MHz
RX: 2.3 V
TX: 0 V
RX: 2.4 V
0 V
RX: 0.8 V TX: 0.6 V
@156.1 MHz
TX: 0 V
RX: 0 V
TX: 2.1 V
RX: 7.4 V
TX: 6.9 V RX: 0 V
TX: 2.0 V
RX: 0 V
TX: 1.7 V
RX: 0 V
TX: 4.4 V
RX: 1.3 V RX: 7.4 V
TX: 0 V TX: 6.9 V
RX: 0 V
TX: 2.1 V RX: 0 V
TX: 1.2 V
RX: 3.1 V
TX: 0 V
5.0 V
RX: 4.1 V
TX: 0 V
3.5 V
2.6 V @25 °C
MUTE: 0 V
BUSY: 3.5 V
TX: 3.5 V
MUTE: 3.5 V
BUSY: 0.6 V
TX: 0.6 V
0.2 V p-p
RX: 3.5 V
TX: 0 V
RX: 0 V
3.5 V
TX: 3.4 V
MUTE: 3.1 V
BUSY: 0 V
TX: 3.1 V
0.5 dBµV emf
@156.1 MHz
SAVE ON: 0 V
SAVE OFF: 4.9 V
TX: 0 V
RX: 2.3 V
TX: 0 V
4.2 V
RX: 2.6 V RX: –2.9 V
RX: 0 V TX: 2.3 V TX: 0 V
TX: 3.0 V
8.0 V 2.6 V
RX: 3.7 V
TX: 4.2 V
0.8 V
0 V 3.5 V
RX: –1.2 V
TX: –0.6 V
RX: –4.0 V
@156.1 MHz
TX: 0 V
RX: 2.6 V
TX: 2.6 V
RX: –1.6 V
TX: –0.9 V
RX: –0.6 V
@156.1 MHz TX: –2.9 V
RX: 0 V
TX: 5.0 V
RX: –4.1 V
TX: –4.6 V
RX: 0.1 V
RX: 2.6 V
RX: –4.8 V TX: 3.4 V
RX: –4.8 V TX: 0 V
TX: –5.0 V
TX: –5.0 V
SAVE ON: 0 V
SAVE OFF: 3.5 V
SAVE ON: 3.5 V
0.8 V
SAVE OFF: 0.6 V
MUTE: 0.3 V
MUTE: 0 V
BUSY: 0.8 V
BUSY: 0.8 V
TX: 0.1 V
3.5 V
TX: 0.2 V
PWR ON: 6.7 V
PWR OFF: 6.9 V
3.5 V
MUTE: 0 V
BUSY: 1.7 V
TX: 1.7 V
MUTE: 0 V
BUSY: 3.5 V
TX: 3.5 V
5.1 V
3.5 V
7.4 V
OPTION ON: 0 V
OPTION OFF: 3.5 V
RX: 3.0 V RX: 4.8 V
–2.5 dBµV emf
TX: 0 V TX: 0 V
RX: 1.4 V
TX: 0 V
RX: 0.6 V RX: 0.5 V
TX: 0 V TX: 0 V
RX: 3.0 V
TX: 0 V
5.0 V
SAVE ON: 0 V
RX [W]: 0 V
SAVE OFF: 3.4 V
RX [N]: 2.4 V
TX: 0 V
4.9 V
RX [W]: 1.0 V
RX [N]: 1.9 V
TX [W]: 0 V
TX [N]: 1.9 V
RX: 4.1 V
RX [W]: 1.5 V
TX: 3.9 V
RX [N]: 0 V
TX: 0 V
3.4 V
RX: 3.0 V
TX: 2.8 V
RX: 2.8 V
TX: 2.3 V
@156.1 MHz
2.7 V
PLL LOCK: 3.4 V
PLL UNLOCK: 0 V
0.1 V
PWR ON: 1.9 V
PWR OFF: 0 V
PWR ON: 7.4 V
3.5 V
PWR OFF: 0 V
LED ON: 3.4 V
RX: 2.7 V
LED OFF: 0 V
TX: 0.7 V
LED HI: 3.3 V
LED LOW: 0 V
LED OFF: 0 V
PWR OFF: 3.5 V
3.5 V
CLOCK SHIFT ON: 1.9 V
CLOCK SHIFT OFF: 2.0 V
PWR OFF: 3.5 V
CLOCK SHIFT ON: 2.4 V RX: 0 V
CLOCK SHIFT OFF: 3.4 V TX: 3.5 V
PWR OFF: 3.5 V
CLOCK SHIFT ON: 1.8 V
CLOCK SHIFT OFF: 2.0 V
RX [W]: 0 V
4.1 V
RX [N]: 3.3 V
5.7 V
PWR ON: 3.5 V
PWR OFF: 0 V
PWR ON: 3.4 V
PWR OFF: 0 V

Main Unit

Circuit Diagram
RX: 3.1 V
RX: 0.8 V
TX: 0 V
TX: 0 V
RX: 3.6 V RX: 3.2 V
TX: 0 V TX: 0 V
RX: 1.3 V
TX: 0 V
0 V
RX [W]: 3.5 V
RX [N]: 0 V
RX [W]: 1.0 V
TX: 0 V
RX [N]: 1.9 V
TX [W]: 0 V
TX [N]: 1.9 V
0 V
RX [W]: 0 V
RX [N]: 3.0 V
3.5 V
1.7 V
RX: 3.5 V
TX: 0 V
15