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GENERAL INFORMATION
1-5
November 1998
Part No. 001-7600-001
7610 (VHF) AND 7640 (UHF) MOBILE SPECIFICATIONS
The following are general specifications intended for use in testing and servicing this transceiver. For current
advertised specifications, refer to the specification sheet available from your sales representative. Values are
typical and are subject to change without notice.
GENERAL
Frequency Range VHF: 146-174 MHz
UHF: 400-430 MHz, 450-470 MHz, 470-490 MHz, or 488-512 MHz (some
performance degradation from 488-490 MHz with 488-512 MHz models)
Operating Modes Conventional (non-trunked), Tone and digital Call Guard® squelch
Channels 32 maximum (2 banks x 16 channels available)
Transmit/Receive Separation Any frequency within the range
Channel Spacing (dual IF Models) VHF - 12.5 kHz (narrow band) and 30 kHz (wideband)
UHF - 12.5 kHz (narrow band) and 25 kHz (wideband)
Maximum Deviation 12.5/15 kHz channel spacing - 2.5 kHz maximum
25 kHz channel spacing - 5.0 kHz maximum
Frequency Stability 5.0 PPM (VHF), 2.5 PPM (UHF) from –22° to +140° F (–30° to +60° C)
Dimensions (w/o controls) 1.6” H x 5.5” W x 6.7” D (4.1 cm x 13.9 cm x 17.0 cm)
Weight 2 lb. 11 oz. (1.22 kg)
Supply Voltage 13.6 volts DC nominal (12-volt, negative ground vehicle electrical system)
Current Drain (maximum) Standby - 200 mA standby
Receive (rated audio out) - 700 mA
Medium Tx Power - 6.0 A (VHF), 7.0 A (UHF)
High Tx Power - 15 A max/10 A typ (VHF), 11 A max/8 A typ (UHF)
FCC Compliance Parts 15 and 90
RECEIVER
Sensitivity (12 dB SINAD) 0.25 µV
Selectivity 70 dB at 25 kHz, 60 dB at 12.5 kHz
Spurious and Image Rejection 70 dB
Intermodulation 65 dB
Hum and Noise 46 dB at 25 kHz, 40 dB at 12.5 kHz
Maximum Frequency Spread Any spread within the range
Audio Power Output 3.5 W into 4-ohm load
Audio Distortion Less than 10% at 1 kHz with 60% deviation
Audio Response +2, –8 dB at 6 dB per octave de-emphasis
RF Input Impedance 50 ohms
TRANSMITTER
RF Power Output VHF: 45W (high), 25W (low 1), 4.5W (low 2)
UHF: 35W (high), 20W (low 1), 3.5W (low 2)
Spurious and Harmonic Emissions 70 dB
FM Hum and Noise 46 dB at 25 kHz, 40 dB at 12.5 kHz
Audio Modulation 12.5 kHz - 11K0F3E, 25 kHz - 16K0F3E
Audio Distortion Less than 5% at 1 kHz with 40% modulation
Audio Frequency Response +2, –8 dB at 6 dB per octave pre-emphasis
Maximum Frequency Spread Any spread within the band
RF Output Impedance 50 ohms
Duty Cycle 20% TIA