Icom IC F121S - Manual (Page 15)

LV
PLL lock voltage
check point
C133
PLL lock voltage
adjustment for TX
C134
PLL lock voltage
adjustment for RX
DC power supply
13.2 V / 15 A
5 - 4
5-2 PLL ADJUSTMENT
PLL LOCK
VOLTAGE 1
2
3
4
• Operating freq. : 174.000 MHz
• Receiving
• Output power : Low1
• Transmitting
• Operating freq. : 136.000 MHz
• Receiving
• Output power : Low1
• Transmitting
MAIN Connect a digital multi-
meter or an oscillo-
scope to the check
point, “LV”.
3.5 V
3.5 V
0.9–1.5 V
1.0–1.6 V
MAIN C134
C133
Verify
ADJUSTMENT ADJUSTMENT CONDITIONS
UNIT LOCATION
VALUE
UNIT ADJUST
MEASUREMENT ADJUSTMENT