Pll Adjustments - Icom IC-M700PRO Servise Manual

4-2 PLL ADJUSTMENTS

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