DP580 Service Manual
Tx Part
1. Output power: High (3.5W---4.5W), low (0.7W---1.5W)
2. Transmitting Current: High-power (<= 1.7A), low-power (<=1.2A)
8.General Specification
Model
DP580
Frequency Range
136~174 MHz, 350~400 MHz, 400~470 MHz
Channel Capacity
16 partitions*16 channels
Channel Spacing
25 kHz/20KHz/12.5kHz
Operating Voltage
7.4V, cathode grounded
Operating Temperature
-25
℃~ +55℃
Antenna Impedance
50Ω
Microphone Impedance
2.2kΩ
Battery
Li-ion battery, DC 7.4V, 2000mAh
Receiver
Receiving sensitivity (12dB
SINAD)
-119dBm
Sensitivity (Level 3)
≤-120dBm
Selectivity of Adjacent
Channels
≥60dB@12.5kHz, ≥70dB@25kHz
Intermodulation Immunity
≥65dB
Spurious Response Rejection
≥70dB
Audio Output Power
0.5W, @distortion
≤5%, 16Ω
Transmitter
Transmitting Power
4W/1W @7.4V DC
Frequency Stability
≤ ±2.5ppm
Maximum Modulation Offset
≤±2.5kHz@12.5kH, ≤±5kHz@25kH
Modulation Distortion
(300~3000Hz)
≤ 3%
Power of Adjacent Channel
≤-60dBm@12.5kHz, ≤-70dBm@25kHz
Spurious Emission
≤-36dBm@<1GHz, ≤-30dBm@>1GHz
Current Consumption
≤1.7A @ 7.4V DC
9.Equipment for Maintenance and Test
The following devices are used in maintenance and debugging.
Wireless general-purpose tester HP8920/8921
25
Summary of Contents for DP580
Page 9: ...DP580 Service Manual 4 Circuit Description 4 1 Main Board 6 ...
Page 124: ...DP580 Service Manual Figure 4 Top Layer Layout Drawing of Main Board DP580 01 121 ...
Page 125: ...DP580 Service Manual Figure 5 Bottom Layer Layout Drawing of Main Board DP580 01 122 ...
Page 126: ...DP580 Service Manual Figure 6 Top Layer Layout Drawing of Main Board DP580 02 123 ...
Page 127: ...DP580 Service Manual Figure 7 Bottom Layer Layout Drawing of Main Board DP580 02 124 ...
Page 128: ...DP580 Service Manual Figure 8 Top Layer Layout Drawing of Main Board DP580 05 125 ...
Page 129: ...DP580 Service Manual Figure 9 Bottom Layer Layout Drawing of Main Board DP580 05 126 ...