Icom IC-7700

4 - 11
4-6 ADJUSTMENTS ON THE SCOPE UNIT
ADJUSTMENT ADJUSTMENT CONDITION OPERATION
ADJUSTMENT
POINT
VALUE
PREPARATION
(Common setting)
1 • Frequency : 14.200 MHz
• Mode : CW
• [P.AMP] : "OFF"
• [SCOPE] : "ON"
• [SCOPE ATT] : "OFF"
• [SPAN] : ±25 kHz
–––
3rd LO LOCK
VOLTAGE
1
–
1) Connect a Digital multimeter to the
CP801.
2) Adjust the lock voltage.
C824 2.2–2.8 V
SCOPE 1 • Receiving • Connect a Signal Generator to [ANT1]
and set as;
Frequency : 14.200 MHz
Modulation : None
Level : +54 dBµ
L203
→
L202
→
L201
→
L5
→
L6
→
C41 (in sequence)
and
L5, L6, C41
(repeatedly)
Maximum
waveform
on the
SCOPE
screen
2 • Receiving • Connect a Signal Generator to J1
(SCOPE UNIT) and set as;
Frequency : 71.715 MHz
Modulation : None
Level : +100 dBµ
C41
Minimum
waveform
on the
SCOPE
screen
3 • Receiving • Connect a Signal Generator to [ANT1]
and set as;
Frequency : 14.200 MHz
Modulation : None
Level : +54 dBµ
L5, L6
(repeatedly)
Maximum
waveform
on the
SCOPE
screen
SCOPE GAIN 1 • Receiving • Adjust the waveform to set the peak
of the wave spectrum reaches the 6th
scale.
R416 (see fi g. 1).
SCOPE
ATTENUATION
1 • [SCOPE ATT] : 30 dB
• Receiving
• Adjust the waveform to set
the peak
of the wave spectrum reaches the 3rd
scale.
R11 (see fi g. 2)
<fig. 1>
6th scale
<fig. 2>
3rd scale