Icom IC-F621 - Pll Adjustment

5 - 6
5-2 PLL ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
ADJUSTMENT
UNIT LOCATION UNIT ADJUST
PLL LOCK
VOLTAGE
1 • Operating CH
• Receiving
: CH1 MAIN Connect a digital
multimeter or an oscil-
loscope to the check
point, "LV".
1.0 V MAIN C133
2 • Transmitting 1.1 V C134
3 • Operating CH
• Receiving
: CH7 3.0–4.4 V [L]
3.3–4.5 V [M]
3.3–4.5 V [H]
Verify
4 • Transmitting
LV
PLL lock voltage
check point
C134
PLL lock voltage
adjustment for TX
C133
PLL lock voltage
adjustment for RX
DC power supply
13.6 (13.2) V / 20 A