DP990/DP995service manual
b. In PC mode, go to [Low Tx Frequency] (F1~F8) and adjust the low Tx power to 0.8~1.2W.
Max. Frequency Deviation
a. In PC mode, go to [Max Frequency Deviation] and adjust the value to 4.8.0±0.05kHz.
b. In PC mode, go to [Low Frequency Deviation] (F1~F8) and adjust the value to 4.8±0.05kHz.
c. In PC mode, go to [Max Frequency Deviation] (F1~F8) and adjust the value to 4.8±0.05kHz.
6.2.4. VOX
In PC mode, adjust VOX 1 and VOX 10 under an AFGen1 Lvl of 50mV and 5mV respectively.
6.2.5. Low Voltage (Tx)
Set the supply voltage to 6.8V. In PC mode, go to [Low Voltage (Tx)] and wait till the value become stable, and
click OK.
6.2.6. Rx
Rx Sensitivity
a. Enter PC mode, double click [RF Rx Sensitivity], and select F1 to F8 successively.
b. Fix the Amplitude to -119dBm. While testing under each frequency, set the RF Gen Freq, and adjust the PC
software value to get a maximum SINAD (SINAD>=12dB).
L9 Squelch Thresholds
On threshold: Set the RF signal amplitude to -116 dBm and the modulation deviation to 3 kHz/ 1.5 kHz. In PC
mode (at F1~F8), wait till the value becomes stable, and click OK.
Off threshold: Set the RF signal amplitude to -119 dBm and the modulation deviation to 3 kHz/ 1.5 kHz. In PC
mode (at F1~F8), wait till the value becomes stable, and click OK.
L1 Squelch Thresholds
On threshold: Set the RF signal amplitude to -123 dBm and the modulation deviation to 3 kHz/ 1.5kHz. In PC mode
(at F1~F8), wait till the value becomes stable, and click OK.
Off threshold: Set the RF signal amplitude to -125 dBm and the modulation deviation to 3 kHz/ 1.5kHz. In PC
mode (at F1~F8), wait till the value becomes stable, and click OK.
RSSI
a. Set the RF signal amplitude to -110 dBm and the modulation deviation to 3 kHz/1.5 kHz. In PC mode, go to RSSI
L1 (F1~F8), wait till the value becomes stable, and click OK.
b. Set the RF signal amplitude to -80 dBm and the modulation deviation to 3 kHz/1.5 kHz. In PC mode, go to RSSI
L4 (F1~F8), wait till the value becomes stable, and click OK.
6.3.Test Items (Test Mode only)
6.3.1. Rx
a. Sensitivity: W <=-119dBm@ 12dB SINAD, N<=-118dBm@12dB SINAD
b. Distortion: <=5%
c. Current: <=160mA (static), <=550mA (operating)
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