Icom IC-F420 - Unit Installation Procedure

5 - 3
5-2 PLL ADJUSTMENT
PLL LOCK
VOLTAGE
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
3
4
• Operating frequency: (Ch1)
[L-band] : 400.00000 MHz
[ML-band]
∏ : 440.00000 MHz
[ML-band] Ò : 450.00000 MHz
[MH-band] : 470.00000 MHz
[H-band] : 490.00000 MHz
• Receiving
• Power selection : Low1
• Transmitting
• Operating frequency: (Ch2)
[L-band] : 430.00000 MHz
[ML-band] : 470.00000 MHz
[MH-band] : 490.00000 MHz
[H-band]
∏ : 520.00000 MHz
[H-band] Ò : 512.00000 MHz
• Receiving
• Power selection : Low1
• Transmitting
MAIN Connect a digital
multi-meter or oscil-
loscope to the
check point CP1.
1.5 V
1.5 V
3.5–5.5 V
MAIN L23
L26
Verify
CP1
PLL lock voltage
check point
L23
PLL lock voltage
adjustment for TX
L26
PLL lock voltage
adjustment for RX
DC power supply
13.2 (13.6) V / 15 A