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