Pll Adjustment - Icom IC-F41GS Servise Manual

5-2 PLL ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
PLL LOCK 1 • Operating freq. : 400.000 MHz
VOLTAGE
• Receiving
2 • Transmitting
3 • Operating freq. : 430.000 MHz
• Receiving
4 • Transmitting
• MAIN unit
C372
PLL lock voltage
adjustment for RX
C373
PLL lock voltage
adjustment for TX
UNIT
[L] MAIN Connect a digital multi-
440.000 MHz [ML]
450.000 MHz [MH]
480.000 MHz [H]
[L]
480.000 MHz [ML]
490.000 MHz [MH]
520.000 MHz [H]
5 - 6
MEASUREMENT
LOCATION
meter or an oscillo-
scope to the check
point, "CP7".
2.5–4.0 V
3.0–4.5 V other
ADJUSTMENT
VALUE
UNIT ADJUST
1.3 V MAIN C372
1.3 V C373
[L] Verify
3.0–4.5 V
CP7 (LV)
PLL lock voltage
check point