Frequency Adjustment - Icom IC-M25 Service Manual

M ADJUSTMENT UTILITY SCREEN
ADJUSTMENT CONDITION
REFERENCE FREQUENCY
TX OUTPUT POWER
RX SENSITIVITY
SQUELCH
6-2 FREQUENCY ADJUSTMENTS
1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.
2) Set or modify the adjustment value as specified using [←]/[→] on the PC's keyboard, and then push [ENTER].
TRANSCEIVER'S
ADJUSTMENT
PLL LOCK FM MODULATION
1 • CH.:
VOLTAGE • Receiving
VERIFICATION
2 • CH.:
• Transmitting
REFERENCE 1 • CH.:
FREQUENCY
• Transmitting
CONDITION
16 1) Connect an RF power meter to the
antenna connector.
2) Click the [Update (F5)] button to check on
16
the "I/O Check screen" as below.
16 • Loosely couple a frequency counter to the
antenna connector.
• I/O Check screen
(The values shown above are exsample only.
Each transceiver has own values.)
OPERATION
6-2
ADJUSTMENT
VALUE
ITEM
1.65 V ±0.5 V
[LVIN]
(On the "I/O
1.70 V ±0.5 V
Check screen")
156.800000
[Ref. Freq.]
(±500 Hz)
The Lock Voltage is displayed here.
MHz