Pll Adjustment - Icom IC-R5 Service Manual

5-2 PLL ADJUSTMENT

"REFERENCE FREQUENCY" adjustment must be performed at "ADJUSTMENT MODE".
ADJUSTMENT ADJUSTMENT CONDITION
1ST VCO
1 • Displayed frequency :
LOCK
VOLTAGE
• Receiving
2 • Displayed frequency :
• Receiving
3 • Displayed frequency :
• Receiving
4 • Displayed frequency :
• Receiving
5 • Displayed frequency :
• Receiving
2ND VCO
1 • Displayed frequency :
LOCK
VOLTAGE
• Receiving
2 • Displayed frequency :
• Receiving
REFERENCE
1 • Displayed frequency :
FREQUENCY
• Receiving
DETECTOR 1 • Displayed frequency :
OUTPUT
VOLTAGE
• Connect an SSG to the antenna
connector and set as:
Level
Modulation : OFF
• Receiving
*This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.
493.300 MHz
493.300 MHz
282.900 MHz
0.150 MHz
493.295 MHz
430.000 MHz
493.300 MHz
(Fr ch) 439.800 MHz
145.600 MHz
: 1 mV (–47 dBm)
*
MEASUREMENT
UNIT LOCATION
RF Connect the digital
multi-meter to the
check point LV1.
RF Connect the digital
multi-meter to the
check point V.
RF Connect the fre-
quency counter to
the check point F.
RF Connect the digital
multi-meter to check
point QUAD.
5 - 3
ADJUSTMENT
VALUE
UNIT
1.8 V – 2.8 V RF
1.8 V – 2.8 V
less than 12 V
1.4 V – 2.4 V
less than 12 V
0.4 V – 1.0 V
less than 2.6 V
706.4999 MHz – LOGIC
706.5001 MHz
1.0 V RF
POINT
ADJUST
L63
Verify
Verify
Verify
Verify
Verify
[DIAL]
L21