Specifications; Antenna Tuner - Icom IC-7400 Service Manual

SECTION 1.
• General
• Frequency coverage :
Receive
Transmit
1
* Some frequency ranges are not guaranteed.
2
* Depending on version.
• Mode : USB, LSB, CW, RTTY, AM, FM
• No. of memory ch. : 102
• Antenna connector : SO-239×3
for 144 MHz; 50 Ω)
• Operating temp. range : –10˚C to +60˚C ; +14˚F to +140˚F
• Frequency stability : Less than ±7 ppm from 1 min.
to 60 min. after power ON. After
that, rate of stability is less than
±1 ppm/hr. at 25˚C
Temperature fluctuations 0˚C to
+50˚C
±5 ppm.
• Frequency resolution : 1 Hz
• Power supply : 13.8 V DC ±15%
• Power consumption :
Transmit Max. power
Receive Standby
Max. audio
• Dimensions : 287(W)×120(H)×316.5(D) mm
13
(projections not incl.)
• Weight (approx.) : 9.0 kg; 19 lb 13 oz
• ACC 1 connector : 8-pin DIN connector
• ACC 2 connector : 7-pin DIN connector
• DATA connector : Mini DIN 6-pin
• CI-V connector : 2-conductor 3.5 (d) mm (
• Transmitter
• Output power
(continuously adjustable)
SSB/CW/RTTY/FM Less than 5 to 100 W
AM Less than 5 to 40 W
• Modulation system :
SSB PSN modulation
AM Low power modulation
FM Phase modulation
• Spurious emission : 50 dB
60 dB
• Carrier suppression : 40 dB
• Unwanted sideband : 55 dB
suppression
• ∂TX variable range
: ±9.99 kHz
: 8-pin connector (600 Ω)
• Mic. connector
• ELEC-KEY connector : 3-conductor 6.35(d) mm (
• KEY connector : 3-conductor 6.35(d) mm (
• SEND connector : Phono
• ALC connector : Phono

SPECIFICATIONS

(Unit: MHz)
1 2
0.030– 60.000000* *
144.000– 146.000000
2
1.800– 1.999999*
2
3.500– 3.999999*
2
7.000– 7.300000*
2
10.100– 10.150000*
2
14.000– 14.350000*
2
18.068– 18.168000*
2
21.000– 21.450000*
2
24.890– 24.990000*
2
28.000– 29.700000*
2
50.000– 54.000000*
144.000– 146.000000
( 99 regular, 2 scan edges and 1
call)
(2 for HF/50 MHz and 1
.
(+77˚F)
less than
(+20˚F to +122˚F)
(negative ground)
23.0 A
2.2 A
3.0 A
5 23 15
⁄ (W)×4 ⁄ (H)×12 ⁄ (D) in
16 32 32
")
1
⁄
8
:
(HF bands)
(50/144 MHz)
")
1
⁄
4
")
1
⁄
4
(RCA)
(RCA)
• Receiver
• Receive system
• Intermediate frequencies:
1st
2nd
3rd
• Sensitivity
(typical)
SSB, CW, RTTY
(10 dB S/N)
AM
(10 dB S/N)
FM
(12 dB SINAD)
1 2
* Pre-amp 1 is ON, *
• Squelch sensitivity
(Pre-amp: OFF)
SSB, CW, RTTY
FM
• Selectivity
SSB
(BW: 2.4 kHz)
CW
(BW: 500 Hz)
RTTY
(BW: 350 Hz)
AM
(BW: 6 kHz)
FM
(BW: 15 kHz)
• Spurious and image rejection ratio:
HF/50 MHz
144 MHz
• AF output power
(at 13.8 V DC)
• RIT variable range
• PHONES connector
• Ext. SP connector

• Antenna tuner

• Matching impedance range:
HF bands
50 MHz band
• Minimum operating input power
• Tuning accuracy
• Insertion loss
All stated specifications are typical and subject to change without no-
tice or obligation.
1 - 1
: Triple conversion
superheterodyne system
64.455 MHz
455 kHz
36 kHz
:
1
0.16 μV*
(1.80–29.99 MHz)
2
0.13 μV*
(50 MHz)
3
0.11 μV*
(144 MHz)
13 μV
(0.5–1.799 MHz)
1
2 μV*
(1.80–29.99 MHz)
2 3
1 μV * *
(50 /144 MHz)
1
0.5 μV*
(28.0–29.99 MHz)
2
0.25 μV*
(50 MHz)
3
0.18 μV*
(144 MHz)
3
Pre-amp 2 is ON, * Pre-amp is ON
:
Less than 5.6 μV
Less than 1.0 μV
:
More than 2.4 kHz/–6 dB
Less than 3.6 kHz/–60 dB
More than 500 Hz/–6 dB
Less than 700 Hz/–60 dB
More than 360 Hz/–6 dB
Less than 650 Hz/–60 dB
More than 6.0 kHz/–6 dB
Less than 15.0 kHz/–60 dB
More than 12.0 kHz/–6 dB
Less than 20.0 kHz/–60 dB
More than 70 dB
(except IF through
on 50 MHz band)
More than 60 dB
: More than 2.0 W at 10% distortion
with an 8 Ω load
: ±9.99 kHz
: 3-conductor 6.35 (d) mm (
: 2-conductor 3.5 (d) mm (
16.7 to 150 Ω unbalanced
(Less than VSWR 3:1)
20 to 125 Ω unbalanced
(Less than VSWR 2.5:1)
: 8 W
(HF bands)
15 W
(50 MHz band)
: VSWR 1.5:1 or less
: Less than 1.0 dB
(after tuning)
")
1
⁄
4
")/8 Ω
1
⁄
8