Specifications - Icom IC-746PRO Instruction Manual

• General
• Frequency coverage :
Receive
108.000– 174.000000*
Transmit
144.000– 148.000000
*Some frequency ranges are not guaranteed.
• 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 : 55dB
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
(Unit: MHz)
0.030– 60.000000*
1.800– 2.000000
3.500– 3.999999
7.000– 7.300000
10.100– 10.150000
14.000– 14.350000
18.068– 18.168000
21.000– 21.450000
24.890– 24.990000
28.000– 29.700000
50.000– 54.000000
(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)

SPECIFICATIONS

• Receiver
• Receive system : Triple conversion
superheterodyne system
• Intermediate frequencies:
1st 64.455 MHz
2nd 455 kHz
3rd 36 kHz
• Sensitivity :
(typical)
SSB, CW, RTTY 0.16 µV*
0.13 µV*
(10 dB S/N)
0.11 µV*
AM 13 µV
(10 dB S/N)
2 µV*
1 µV
FM 0.5 µV*
(12 dB SINAD)
0.25 µV*
0.18 µV*
* 1 Pre-amp 1 is ON, * 2 Pre-amp 2 is ON, *
• Squelch sensitivity
(Pre-amp: OFF)
SSB, CW, RTTY Less than 5.6 µV
FM Less than 1.0 µV
• Selectivity :
SSB More than 2.4 kHz/–6 dB
(BW: 2.4 kHz)
Less than 3.6 kHz/–60 dB
CW More than 500 Hz/–6 dB
(BW: 500 Hz)
Less than 700 Hz/–60 dB
RTTY More than 360 Hz/–6 dB
(BW: 350 Hz)
Less than 650 Hz/–60 dB
AM More than 6.0 kHz/–6 dB
(BW: 6 kHz)
Less than 15.0 kHz/–60 dB
FM More than 12.0 kHz/–6 dB
(BW: 15 kHz)
Less than 20.0 kHz/–60 dB
• Spurious and image rejection ratio:
HF/50 MHz More than 70 dB
on 50 MHz band)
144 MHz More than 60 dB
• AF output power : More than 2.0 W at 10% distortion
with an 8 Ω load
(at 13.8 V DC)
• RIT variable range : ±9.99 kHz
• PHONES connector : 3-conductor 6.35 (d) mm (
• Ext. SP connector : 2-conductor 3.5 (d) mm (
• Antenna tuner
• Matching impedance range:
16.7 to 150 Ω unbalanced
HF bands
(Less than VSWR 3:1)
20 to 125 Ω unbalanced
50 MHz band
(Less than VSWR 2.5:1)
• Minimum operating input power
: 8 W
15 W
• Tuning accuracy : VSWR 1.5:1 or less
• Insertion loss : Less than 1.0 dB
All stated specifications are typical and subject to change without no-
tice or obligation.
15
1
(1.80–29.99 MHz)
2
(50 MHz)
3
(144 MHz)
(0.5–1.799 MHz)
1
(1.80–29.99 MHz)
* 2 * 3
(50 /144 MHz)
1
(28.0–29.99 MHz)
2
(50 MHz)
3
(144 MHz)
3 Pre-amp is ON
:
(except IF through
")
1
⁄
4
")/8 Ω
1
⁄
8
(HF bands)
(50 MHz band)
(after tuning)
100