Icom IC F121S - Manual (Page 52)

C133
PLL lock voltage
adjustment for RX
C134
PLL lock voltage
adjustment for TX
LV
PLL lock voltage
check point
DC power supply
13.2 V / 15z A
5 - 4
5-2 PLL ADJUSTMENT
PLL LOCK
VOLTAGE 1
2
3
4
• Operating freq. : 400.000 MHz [L]
440.000 MHz [H]
• Receiving
• Output power : Low1
• Transmitting
• Operating freq. : 430.000 MHz [L]
490.000 MHz [H]
• Receiving
• Output power : Low1
• Transmitting
MAIN Connect a digital multi-
meter or an oscillo-
scope to the check
point, “LV”.
1.0 V
1.0 V
3.3–4.4 V [L]
3.3–4.5 V [H]
3.3–4.4 V [L]
3.3–4.5 V [H]
MAIN C133
C134
Verify
ADJUSTMENT ADJUSTMENT CONDITIONS
UNIT LOCATION
VALUE
UNIT ADJUST
MEASUREMENT ADJUSTMENT