4 - 2
4-2 PLL ADJUSTMENTS
REFERENCE
LOOP LOCK
VOLTAGE
MAIN LOOP
LOCK
VOLTAGE
REFERENCE
FREQUENCY
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
1
2
1
2
• Display frequency : 7.9999 MHz
• Mode : J3E
• Receiving
• Display frequency : 0.0300 MHz
• Display frequency : 0.5000 MHz
• Receiving
• Display frequency : 29.9999 MHz
• Wait for 5 min. after power ON.
• Terminate P3002 to ground with a
50 ohms resister.
• Receiving
PLL
PLL
PLL
Connect a digital
multimeter or
oscilloscope to check
point J3004.
Connect a digital
multimeter or
oscilloscope to check
point J3005.
Connect an RF
voltmeter to check
point P3002.
Connect a frequency
counter to check
point P3002.
3.2 V
More than 1.5 V
4.0 V
More than 1.0 V
Maximum level
(More than +2 dBm)
60.000000 MHz
PLL
PLL
PLL
C3049
Verify
L3024
Verify
L3004,
L3005
L3003
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