PA G E 2 6 I N S T R U C T I O N M A N U A L T X 4 5 0 0
ELECTRICAL
General
Compliant Specification: Meets AS/NZS 4365 for
radio communications
equipment in the UHF
citizen and personal radio
service.
Frequency Range TX: 476.425-477.4125 MHz
Number of Channels: 80
Channel Spacing: 12.5 kHz
Operation Mode: Simplex or half Duplex
with repeater talk around.
Scanning Speed: 50 ms per channel
(20 channels per second).
Antenna Impedance: 50 Ohms nominal
Nominal Battery Voltage: 12 volts DC
Operating Voltage Range: 10-16 volts DC
Battery Polarity: Negative Earth
Standard Test Voltage: 13.8 volts DC
Overvoltage Protection: 25 volts DC maximum.
At 18 volts DC the channel
display flashes ‘Hi DC’ for
5 seconds on receive.
The RF power is reduced
and TX flashes on
transmit.
Reverse Voltage
Protection: Diode Crowbar
Overcurrent Protection: In-line 2 amp fuse
Operating Temperature: -10°C to 60°C
Transmitter
RF Output: 5 watts
Spurious Emission: < - 70 dBc
Frequency Error: < ± 1.5 kHz
Modulation: FM
Maximum Deviation: < ± 2.5 kHz at + 20 dB
AF limiting.
Transmit Frequency
Response: + 6 dB per octave
300 Hz to 3 kHz + 1-3 dB.
Demodulated Audio
Signal to Noise: > 45 dB unweighted
Current Consumption: 1.7 amps with 50 Ohms
termination.
Receiver
Intermediate Frequencies: 38.85 MHz, 450 kHz
Sensitivity: - 122 dBm for 12 dB
SINAD unweighted
Selectivity: - 6 dB at + 3.5 kHz
- 60 dB at ± 12.5 kHz
Intermodulation
Immunity: -72 dB
Blocking Immunity: -98 dB
Spurious Response
Immunity: 70 dB
Audio Output Power: 3 watts average into
4 Ohms
Audio Signal to Noise: > 45 dB unweighted
Receive Frequency
Response: - 6 dB/Octave
de-emphasis 300 Hz to
3 kHz + 1-3 dB.
Current Consumption: < 175 mA muted
750 mA Full volume.
Conducted Spurious
Emission: < - 70 dBm
MECHANICAL SPECIFICATIONS &
CONNECTIONS
Dimensions: 50 (H) x 171 (L) x
112 (D) mm
Weight: 646 grams
12 volt Power Supply: Two core cable with
bulkhead connector in rear
panel.
Antenna: SO239 Panel Socket
External Speaker: 3.5 mm Mono Jack
Microphone Port: 6 Way telephone style
with rubber strain relief.
SPECIFICATIONS
Specifications are subject to change without notice or obligation
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