Adjustment On The Pll Unit - Icom IC-7410 Service Manual

4-2 ADJUSTMENTS ON THE PLL UNIT
ADJUSTMENT ITEM
REFERENCE 1 • Frequency: 14.10000 MHz
FREQUENCY
SIGNAL
2 • Frequency: 14.10000 MHz
3
LOCK VOLTAGE
1ST LO LEVEL 1 • Frequency: 0.1 MHz*
2 • Frequency: 4.0 MHz*
3 • Frequency: 7.9 MHz*
4 • Frequency: 8.0 MHz*
5 • Frequency: 15.0 MHz*
6 • Frequency: 21.9 MHz*
7 • Frequency: 22.0 MHz*
8 • Frequency: 50.0 MHz
9
RX 2ND LO LEVEL
TX 3RD LO LEVEL
CODEC CLOCK LEVEL
*: For all models except [TPE] and [KOR]. **: For [TPE] and [KOR].
TRANSCEIVER'S
CONDITION
• Mode: USB
• Transmitting
• Mode: USB
• Receiving
• Frequency: 14.10000 MHz
• Receiving
1.8 MHz**
• Receiving
3.5625 MHz**
• Receiving
7.1 MHz**
• Receiving
10.1 MHz**
• Receiving
14.35 MHz**
• Receiving
21.45 MHz**
• Receiving
24.89 MHz**
• Receiving
• Receiving
†
• Frequency: 54.0 MHz
• Receiving
• Receiving
• Transmitting
• Receiving
OPERATION
• Connect a frequency counter to
J571.
• Connect an RF voltmeter to J571.
• Connect a voltmeter to CP221.
• Connect an RF voltmeter to J501.
• Connect an RF voltmeter to the J852.
• Connect an RF voltmeter to the J851.
• Connect an RF voltmeter to the J601.
†
: Except [TPE].
4 - 2
MEASURE ADJUST
POINT POINT
J571 (Verify) 64.000000 MHz
J571 L551, L552 Max. voltage
(Repeatedly)
– –10 dBm (±3 dB)
CP221 (Verify)
J501 (Verify) +4 dBm (±3 dB)
J852 (Verify)
J851 (Verify)
J671 (Verify) –12 dBm (±3 dB)
VALUE
(±300 Hz)
(Verify)
1.0–4.0 V
–10 dBm
(±3 dB)