E-46
Uniden UM725 Radio Owner’s Manual
SPECIFICATIONS
General
Frequency Range
Transmitter 156.025-161.600MHz/Receiver 156.050-
163.275MHz
Display
Full Dot Matrix LCD With Amber & White Cooler Back
Light
Size (W/O Heatsink & Knobs) H:3.38 X W:5.94 X 2.50 Inch ( H:85.7 X W:150.7 X
L:63.5mm)
Weight
Approx. 35.3oz (1kg) With Mic
Power Supply Voltage
13.8V (10.5V - 16V) Negative Ground Only
Antenna Impedance
50 Ω
Microphone
Electret Type
Speaker
4Ω4W (Radio) / 0.5W (Sp Mic)
Water Protect Class
IPx8
Operating Temp.range
5°F to 131°F (-15°C To +55°C)
Storage Temp.range
-22°F To 140°F (-30°C To +60°C)
Transmitter
Frequency Tolerance @ 25°C ±2.5ppm Max.
Power Output
Hi 25W / Lo 1W
Spurious Emission Hi Power -45dBm / Low Power -55dBm
Modulation Frequency
Response
-6dB @500Hz, +6.5dB@2KHz (1KHz ±1.0KHz Dev. Ref)
Microphone Sensitivity For
±3khz Dev.
6mV
Hum & Noise Ratio (300hz,
3000hz Bpf 750us Deem.)
45dB
Modulation Distortion 750us
Deemphasis
0.6% (0.3KHz To 3KHz B.P.H @±3.0KHz Deviation)
Current Drain @ High Power 4.6A Nominal 6A Max @13.8V DC
Receiver
Sensitivity for 20dB SINAD
[Main] With CCITT
0.27uV
Squelch Sensitivity [Main]
Threshold 0.2uV / Tight 0.5uV
Audio Frequency Response
1KHz Reference
+6.5dB @500Hz, -6.5dB@2KHz
Adjacent Channel Selectivity 76dB @±25KHz
Inter Modulation Immunity
70dB
1st & 2nd Image Rejection
80dB
1st & 2nd If Rejection
85dB
Hum & Noise Ratio
45dB
Audio Output Power @ 10%
Distortion
2W Internal /2.2W External Speaker
Current Drain @No Signal
500mA MAX @No Signal/1.2A MAX at Maximum Audio
Output
