Icom IC-M424 Service Manual page 4

SECTION 1.
• Frequency coverage
• Mode
• Operating temperature range
• Current drain (at 12.0 V)
• Power supply requirement
(negative ground)
• Frequency stability
• Antenna impedance
• Dimensions (approximately)
• Weight (approximately)
• Output power
• Modulation system
• Maximum frequency deviation
• Spurious emissions
• Adjacent channel power
• Audio harmonic distortion
• Residual modulation
• Audio frequency response
• Microphone impedance
• Receive system
• Sensitivity
• Squelch sensitivity
• Intermediate frequency
• Intermodulation rejection ratio
• Spurious response rejection ratio More than 70 dB
• Adjacent channel selectivity
• Hum and noise
• Audio frequency response
• Audio output power
(at 10% distortion with a 4 Ω load)
• Sensitivity (1% BER)
• Intermediate frequency
• Intermodulation rejection ratio
• Spurious response rejection ratio More than 73 dB (1% BER)
• Adjacent channel selectivity
All stated specifi cations are subject to change without notice or obligation.
SPECIFICATIONS
[UK], [UK-01], [EUR], [EUR-01],
[HOL], [HOL-01], [FRG], [FRG-01]
TX 156.000–161.450 MHz
RX 156.000–163.425 MHz
156.525 MHz (CH70)
FM (16K0G3E), DSC (16K0G2B)
–20°C to +60°C; –4°F to 140°F
TX high 5.5 A maximum
Maximum audio 5.0 A maximum
13.8 V DC (10.8–15.6 V DC) nominal
±1.5 kHz (–20°C to +60°C; –4°F to 140°F)
50 Ω nominal
180(W) × 82(H) × 119.9(D) mm; 7.1(W) × 3.2(H) × 4.7(D) in
1.2 kg; 2.6 Ib
Less than 0.25 µW
More than 70 dB
Less than 10% (at 60% deviation)
More than 40 dB
+1 dB to –3 dB of 6 dB octave from 300–3000 Hz
2 kΩ
Double conversion superheterodyne
–5 dBµ emf (typical) (20 dB SINAD)
Less than –2 dBµ emf
1st 21.7 MHz, 2nd 450 kHz
More than 68 dB
More than 70 dB
More than 40 dB
+1 dB to –3 dB of –6 dB octave from 300–3000 Hz
More than 10 W
–4 dBµ emf (typical)
1st 30.875 MHz, 2nd 450 kHz
More than 68 dB (1% BER)
More than 73 dB (1% BER)
1 - 1
[USA], [USA-01], [CHN], [CHN-01],
[AUS], [AUS-01]
156.025–157.425 MHz
156.050–163.275 MHz [USA], [USA-01],
156.050–162.025 MHz [CHN], [CHN-01]
13.8 V DC (11.7–15.9 V DC) nominal
±10 ppm
25 W/1 W
Variable reactance frequency modulation
±5.0 kHz
Less than –70 dBc (High power)
Less than –56 dBc (Low power)
–13 dBµ (typical) (12 dB SINAD)
Less than –10 dBµ
More than 70 dB
10 W (typical)
–5 dBµ emf (typical)
[AUS], [AUS-01]