A look at something interesting in the way of UHF CB radio as used in Australia and New Zealand:
The XRS-330CP Connect Portable Pack
Product Specifications:
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 volts DC
Operating Voltage Range 10-16 volts DC
Battery Polarity Negative Earth
Standard Test Voltage 13.8 volts DC
Overvoltage Protection 30 volts DC max. At 18 volts DC the RF power is reduced, and the words ‘Hi DC’ flash.
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 Erro r< ± 1.5 kHz
Modulation FM
Maximum Deviation < ± 2.5 kHz at + 20 dB 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 1.5 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
Current consumption < 175 mA muted 750 mA Full volume
Conducted Spurious Emission < - 70 dBm
MECHANICAL SPECIFICATIONS
Dimensions 21 (H) x 100 (L) x 87 (D) mm
Weight 450 grams
Antenna SO239 panel socket
External Speaker 3.5 mm mono jack
Microphone Port 6 Way telephone style with rubber strain relief
Price: £300 (Equiv)
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