DP405 Service Manual
Note:
the frequency above can be programmed by software.
Operation method:
a）Open the programming software;
b）Click Edit menu (or use shortcut key Tv), select the test frequency in the drop-down menu;
c）Edit the frequency in the popped-up edit list.
The specifications should be tested in the test mode:
Rx Section
1. Sensitivity: <=-119dBm(0.25uV)( wide band, narrow band) 12dB SINAD
2. Distortion: <=5%
3. Current: static current :<=100mA
Received working current: <=400mA
4. Squelch off Sensivitity: when RF input ≤-124dBm, squelch off.
5. Squelch on Sensitivity: when RF input ≥-119dBm, squelch on.
Tx Section
1. Output Power: high (3.8W---4.8W) low (0.7W---1.3W)
2. Tx Current: high power Tx<= 1.6A; low power Tx <=1.0A
3. Tx Distortion: <=5%
4. Tx Frequency Deviation: reference frequency +/-500Hz
5.Undervoltage Indication: when voltage is 6.2V, the red indicator should flash when pressing PTT, and no
Tx power occurs.
7. Main Technical Performance and
Specification
Product DP405
Frequency
(136 ~ 174) MHz (350 ~ 400) MHz (400 ~ 470) MHz (400 ~
Channel Capacity 16 zones*16 channels
Channel Spacing 25 kHz/12.5kHz
Working Voltage 7.4V negative pole connected to ground
Working Temperature -25℃~ + 55℃
22
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