Specifications - Icom IC-746PRO Service Manual

SECTION 1
I GENERAL
• Frequency coverage:
Receive 0.030– 60.000 MHz*
108.000–174.000 MHz*
Transmit 1.800– 1.999 MHz*
7.000– 7.300 MHz*
14.000– 14.350 MHz*
21.000– 21.450 MHz*
28.000– 29.700 MHz*
144.000–148.000 MHz*
* 1 Except for some frequency ranges.
* 2 Depending on version.
• Mode : USB, LSB, CW, RTTY, AM, FM
• Number of memory channels:
101 (99 regular, 1 call, 2 scan edges)
• Antenna connector : SO-239
and 1 for 144 MHz band; 50 Ω)
• Usable 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 the
rate of stability change is less than ±1
ppm at 25˚C (+77˚F). Temperature
fluctuations (0˚C to +50˚C; 32˚F to
122˚F) less than ±5 ppm.
• Freq. resolution : 1 Hz
• Power supply requirement:
13.8 V DC ±15 % (negative ground)
• Current consumption:
Transmit
Receive
• Dimensions : 287(W)
5
11 ⁄
16
• Weight : 9.0 kg (19 lb 13 oz)
• ACC 1 connector : 8-pin DIN connector
• ACC 2 connector : 7-pin DIN connector
• REMOTE connector : 2-conductor 3.5(d) mm (
I TRANSMITTER
• Output power : SSB/CW/RTTY/FM
AM
• Modulation system :
SSB PSN modulation
AM Low power modulation
FM Phase modulation
• Spurious emission : Less than –50 dB (HF bands)
Less than –60 dB (50/144 MHz bands)
• Carrier suppression: More than 40 dB
• Unwanted sideband suppression:
More than 55 dB
• ∆TX variable range : ±9.99 kHz
: 8-pin connector (600 Ω)
• Mic. connector
• ELE-KEY connector : 3-conductor 6.35(d) mm (
• KEY connector : 3-conductor 6.35(d) mm (
• SEND connector : Phono (RCA)
• ALC connector : Phono (RCA)
All stated specifications are subject to change without notice or obligation.

SPECIFICATIONS

1, * 2
1, * 2
2 3.500– 3.999 MHz*
2 10.100–10.150 MHz*
2 18.068–18.168 MHz*
2 24.890–24.990 MHz*
2 50.000–54.000 MHz*
2
✕
3 (2 for HF/50 MHz bands
max. power 23.0 A
stand-by 2.2 A
max. audio 3.0 A
✕ ✕
120(H) 316.5(D) mm
✕ 23 ✕ 15
(W) 4 ⁄ (H) 12 ⁄ (D) in
32 32
1 ⁄ ")
8
5–100 W
5–40 W
1 ⁄ ")
4
1 ⁄ ")
4
I RECEIVER
• Receive system
• Intermediate frequencies:
1st IF freq.
2
2nd IF freq.
2
3rd IF freq.
2
• Sensitivity (typical) :
2
SSB, CW, RTTY (10 dB S/N)
2
AM (10 dB S/N)
FM (12 dB SINAD)
* 1 Pre-amp 1 ON *
• Squelch sensitivity (Pre-amp OFF):
SSB/CW/RTTY Less than 5.6 µV
FM
• Selectivity (typical) :
SSB (at 2.4 kHz bandwidth)
CW (at 500 Hz bandwidth)
RTTY (at 350 Hz bandwidth)
AM (at 6 kHz bandwidth)
FM (at 15 kHz bandwidth)
• Spurious and image rejection ratio:
• RIT variable range : ±9.99 kHz
• Audio output power (at 13.8 V):
• PHONES connector: 3-conductor 6.35 (d) mm (
• EXT SP connector : 2-conductor 3.5 (d) mm (
1 - 1
: Triple-conversion superheterodyne
64.455 MHz
455 kHz
36 kHz
1.8–29.99000 MHz* 1
50.0–54.0000 MHz* 2
144.0–148.0000 MHz* 3
0.5–1.799999 MHz
1.8–29.99000 MHz* 1
50.0–54.0000 MHz* 2
144.0–148.0000 MHz* 3
28.0–29.9900 MHz* 1
50.0–54.0000 MHz* 2
144.0–148.0000 MHz* 3
2 Pre-amp 2 ON * 3 Pre-amp ON
Less than 1.0 µV
More than 2.4 kHz/–6 dB
Less than 3.2 kHz/–40 dB
Less than 3.6 kHz/–60 dB
Less than 4.3 kHz/–80 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 kHz/–6 dB
Less than 20 kHz/–60 dB
More than 70 dB (HF/50 MHz band)
(except IF through in 50 MHz band)
More than 60 dB (144 MHz band)
More than 2.0 W at 10 % distortion
with an 8 Ω load
1
1 ⁄
8
0.16 µV
0.13 µV
0.11 µV
13 µV
2.0 µV
1.0 µV
1.0 µV
0.5 µV
0.25 µV
0.18 µV
⁄ ")
4
") 8 Ω