![background image](http://html1.mh-extra.com/html/icom/ic-f4021s/ic-f4021s_service-manual_612571004.webp)
1 - 1
SECTION 1
SPECIFICATIONS
[USA], [GEN]
[EUR]
GENERAL
• Frequency coverage
400–470 MHz [USA], [GEN], [EUR]
450–512 MHz [USA]
450–520 MHz [GEN]
• Type of emission
Wide
16K0F3E (25.0 kHz)
Middle
–
14K0F3E (20.0 kHz)
Narrow
11K0F3E (12.5 kHz)
8K50F3E (12.5 kHz)
• Number of programable channels
128 channels (8 zones)
• Antenna impedance
50
Ω
(nominal)
• Operating temperature range
−22˚F to +140˚F
–25˚C to +55˚C
• Power supply requirement
Specified Icom’s battery packs only (Operatable voltage; 7.2 V DC negative ground)
• Current drain
(approx.)
RX
Stand-by
75 mA
Max.audio
300 mA
TX
at 4 W
1.6 A
at 1 W
0.8 A
• Dimensions (projections not included)
2
3
/
32
(W) × 4
23
/
32
(H) × 1
9
/
32
(D) in
53.0 (W) × 120.0 (H) × 32.5 (D) mm
• Weight (with BP-231, approx.)
9.2 oz
280 g
TRANSMITTER
• Transmit output power
4 W (High), 2 W (Low2), 1 W (Low1)
• Modulation
Variable reactance frequency modulation
• Max. permissible deviation
Wide
±5.0 kHz
Middle
–
±4.0 kHz
Narrow
±2.5 kHz
• Frequency error
±2.5 ppm
±1.5 kHz
• Spurious emission
More than 70 dB
0.25
µ
W (
≤
1 GHz), 1.0
µ
W (>1 GHz)
• Adjacent channel power
Wide
More than 70 dB (75 dB typ.)
Middle
–
More than 70 dB (73 dB typ.)
Narrow
More than 60 dB (68 dB typ.)
• Audio harmonic distortion
3% typ. (with 1 kHz AF 40% deviation)
• FM hum and noise
(without CCITT filter)
Wide
More than 40 dB (46 dB typ.)
–
Narrow
More than 34 dB (40 dB typ.)
–
• Residual modulation
(with CCITT filter)
Wide
–
More than 45 dB (55 dB typ.)
Middle
–
More than 43 dB (53 dB typ.)
Narrow
–
More than 40 dB (50 dB typ.)
• Limiting charact of modulation
60–100% of max. deviation
• Microphone impedance
2.2 k
Ω
RECEIVER
• Receive system
Double-conversion superheterodyne
• Intermediate frequencies
1st IF; 46.35 MHz, 2nd IF; 450 kHz
• Sensitivity
0.25
µ
V typ. at 12 dB SINAD
−4 dB
µ
V (EMF) typ. at 20 dB SINAD
• Squelch sensitivity (at threshold)
0.25
µ
V typ.
−4 dB
µ
V (EMF) typ.
• Adjacent Frequency
selectivity
Wide
More than 70 dB (75 dB typ.)
Middle
−
More than 70 dB (73 dB typ.)
Narrow
More than 60 dB (65 dB typ.)
• Spurious response
More than 70 dB
• Intermodulation
More than 70 dB (74 dB typ.)
More than 65 dB (67 dB typ.)
• Audio output power
0.5 W typ. at 5% distortion with an 8
Ω
load
• Audio output impedance
8
Ω
All stated specifications are subject to change without notice or obligation.
Measurements made in accordance with EIA-152/204D, TIA-603 ([USA], [GEN]) or EN 300 086 ([EUR]).