Icom IC-M504 Service Manual page 4

SECTION 1
M
GENERAL
• Frequency coverage
• Type of emission
• Antenna impedance
• Operating temperature range
• Power supply requirement
• Current drain (At 13.8 V DC ; approx.)
• Dimensions (Projections not included)
• Weight (Approx.)
M
TRANSMITTER
• Output power (At 13.8 V DC)
• Modulation
• Maximum frequency deviation
• Frequency stability
• Spurious emissions
• Adjacent channel power
• Audio harmonic distortion
• Residual modulation
• Audio frequency response
• Microphone impedance
M
RECEIVER
• Receive system
• Intermediate frequencies
• Sensitivity
• Squelch sensitivity
• Adjacent channel selectivity (typ.)
• Spurious response (typ.)
• Intermodulation rejection ratio (typ.)
• Hum and Noise (typ.)
• Audio frequency response
• Audio output power
• Audio output impedance
Specifications are measured in accordance with TIA/EIA 603
All stated specifications are subject to change without notice or obligation.
SPECIFICATIONS
: TX
RX
CH70 RX
: 16K0G3E (FM), 16K0G2B (DSC)
: 50 Ω (Nominal)
: –4˚F to +140˚F
: 13.8 V DC ±15% (negative ground)
: Receiving
Transmitting
1
: 6 / (W)×4
2
: 3 Ib 19 oz.
: 25 W (High)/1 W (Low)
: Variable reactance frequency modulation
: ±5.0 kHz
: Less than ±10 ppm (–4˚F to +140˚F)
: Less than 70 dBc (at 25 W)
Less than 56 dBc (at 1 W)
: More than 70 dB
: Less than 10% (at 60% deviation)
: More than 40 dB
: +1 dB to –3 dB of 6 dB oct. from 300 Hz to 2500 Hz
: 2 kΩ
: Double conversion superheterodyne system
: 1st IF: 21.7 MHz, 2nd IF: 450 kHz (Normal RX)
1st IF: 31.05 MHz, 2nd IF: 450 kHz (CH70 RX)
: –13 dBµ typical at 12 dB SINAD
: –10 dBµ
: 80 dB (Normal RX)
75 dB (CH70 RX)
: 80 dB (Normal RX)
75 dB (CH70 RX)
: 80 dB (Normal RX)
75 dB (CH70 RX)
: 40 dB
: +1 dB to –3 dB of –6 dB oct. from 300 Hz to 3000 Hz
: 4.5 W typical at 10% distortion with a 4 Ω load
: 4 Ω
1 - 1
156.025–157.425 MHz
156.050–163.275 MHz
156.525 MHz
1.5 A (at max. audio)
5.5 A (at 25 W)
11 27
⁄ (H)×4 ⁄ (D) in.
32 32