Icom IC-7700 Service Manual - page 5
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D Receiver
• Receive system
: Double conversion superheterodyne system
• Intermediate frequencies
:
1st
64.455 MHz
2nd
36 kHz
• Sensitivity (typical)
:
SSB, CW, RTTY (BW=2.4 kHz, 10 dB S/N)
0.100000– 1.799999 MHz
0.5 µV
(pre-amp 1 ON)
1.800000– 29.990000 MHz
0.16 µV
(pre-amp 1 ON)
50.000000– 54.000000 MHz
0.13 µV
(pre-amp 2 ON)
AM (BW=6 kHz, 10 dB S/N)
0.100000– 1.799999 MHz
6.3 µV
(pre-amp 1 ON)
1.800000– 29.990000 MHz
2 µV
(pre-amp 1 ON)
50.000000– 54.000000 MHz
1 µV
(pre-amp 2 ON)
FM (BW=15 kHz, 12 dB SINAD)
28.000000– 29.990000 MHz
0.5 µV
(pre-amp 1 ON)
50.000000– 54.000000 MHz
0.32 µV
(pre-amp 2 ON)
• Internal Modulate Distortion (typical)
: Dynamic range 109 dB
(at 14.100 MHz, 100 kHz separation, pre-amp OFF,
CW mode; BW=500 Hz)
• Selectivity
:
SSB, RTTY (BW=2.4 kHz)
More than 2.4 kHz/–3 dB
Less than 3.6 kHz/–60 dB
CW (BW=500 Hz)
More than 500 Hz/–3 dB
Less than 700 Hz/–60 dB
AM (BW=6 kHz)
More than 6.0 kHz/–3 dB
Less than 15.0 kHz/–60 dB
FM (BW=15 kHz)
More than 12.0 kHz/–6 dB
Less than 20.0 kHz/–60 dB
• Spurious and image rejection ratio
: More than 70 dB
• Squelch sensitivity (pre-amp OFF)
:
SSB, CW, RTTY, PSK31
Less than 5.6 µV
FM
Less than 1 µV
• RIT variable range
: ±9.999 kHz
• Audio output power
: More than 2.6 W
at 10% distortion with an 8 1 load
• PHONES connector
: 3-conductor 6.35 (d) mm (
1
⁄
4
w)
• EXT-SP connectors
: 2-conductor 3.5 (d) mm (
1
⁄
8
w)/8 1
D Antenna tuner
• Matching impedance range
: 16.7 to 150 1 unbalanced
(HF bands; VSWR better than 3:1)
20 to 125 1 unbalanced
(50 MHz band; VSWR better than 2.5:1)
• Minimum operating input
: 8 W
(HF bands)
15 W
(50 MHz band)
• Tuning accuracy
: VSWR 1.5:1 or less
• Insertion loss (after tuning)
: Less than 1.0 dB
All stated specifications are typical and subject to change without notice or obligation.
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