PAGE 30 I NSTRUCTION MANUAL TX4500S
SPECIFICATIONS
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: 25 ms per channel
(40 channels per
second).
Antenna Impedance: 50 Ohms nominal
Nominal Battery Voltage: 12 V DC
Operating Voltage Range: 10-16 V DC
Battery Polarity: Negative earth
Standard Test Voltage: 13.8 volts DC
Overvoltage Protection: 25 volts DC maximum.
At 18 V 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 W
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 W 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 SPECS & 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 are subject to change without notice or obligation
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