Kirisun DP480 Service Manual

DP480 Service Manual
31
9. Equipment for Maintenance and Test
1. Wireless general-purpose tester HP8920/8921
2. Digital multimeter
3. Regulated DC power supply
10.Troubleshooting
SN
Failure Description
Troubleshooting
1
Startup fails
A. Check the battery. If it is low, charge or replace it.
B. The Power key does not work well. Replace the key.
C. The CPU does not work well. Replace it with a new IC19.
Antenna Impedance
50Ω
Microphone Impedance
2.2kΩ
Battery
Lithium-ion battery DC 7.4V , 2000mAh
Average battery duration (5-5-90, high-
power emission), 2000mAh lithium
battery
Analogue channel: 18 hrs
Digital channel: 20 hrs
Receiving Sensitivity (12dB SINAD )
-120dBm
Squelch Sensitivity (3-level)
≤-120dBm
Selectivity of Adjacent Channels
70dB@25KHz /60dB@12.5KHz
Intermodulation Immunity
65dB@25KHz/12.5 KHz
Rated Power
1W 16Ω
Blocking
84dB
Transmitting Power
4W/1W@7.4V DC
Frequency Stability
≤±2.5ppm
Maximum Modulation Offset
±5kHz@25KHz /±2.5kHz@12.5KHz
Modulation Distortion
≤3%
Spurious Emission
≤-36dBm
Current Consumption
≤1.5A@ 7.4V DC

Kirisun DP480 Specifications

General

Brand	Kirisun
Model	DP480
Category	Two-Way Radio
Language	English