Uniden UM425 VHF DSC, Owner'S Manual

Page: 55 / 68

55
Specifications
Transmitter
Power Output 1 watt or 25 watt (user selectable)
Power Requirement 25 watts output: 6A@13.8V DC
Modulation ±5 kHz deviation
Hum and Noise Signal-to-Noise 45 dB with 3 kHz deviation with 1000 Hz modulating
frequency (nominal)
Audio Distortion Less than 8% with 3 kHz deviation with 1000 Hz
modulating frequency
Spurious Suppression -45 dBm @ Hi, -55 dBm @ Lo
Output Power Stabilization Built-in automatic level control (ALC)
Frequency Range 156 to 158 MHz
Frequency Stability ±1.5kHz @ –15°C to + 55°C
Receiver
Frequency Range 156 to 162 MHz
Sensitivity 0.25 μV for 12 dB SINAD
Circuit Dual Conversion Super Heterodyne PLL (Crystal for DSC)
Squelch Sensitivity 0.2 μV Threshold
Spurious Response 75 dB
Adjacent Channel Selectivity 78 dB @ ±25 kHz
Audio Output Power 2.5 watts (10% Distortion, 8 Ω load)
Power Requirement 400 mA @ 13.8V DC at squelched, 1000 mA @ 13.8V DC
at maximum audio output
IF Frequencies 1st 41.925 MHz, 2nd 455 kHz (1st 21.7 MHz, 2nd 455 kHz
for DSC)
UM425 VHF OM.indd 55 28/9/11 11:55:22 AM