tti Tech PMR-446, Service Manual, Page: 10 / 34

4-4. RECEIVER ALIGNMENT
4-4-1. Receiver sensitivity confirmation
1. Connect the Radio in accordance with Figure 3.
2. Set the output level of the RF signal generator for -47dBm and 1.5KHz deviation of 1KHz tone.
3. Set the audio output for 0.6V Vrm by adjusting volume.
4. Reduce the level of RF signal generator for produce a 12dB SINAD.
5. Check the RF signal generator output level (Less then -3.1dBuV).
4-4-2 Squelch Adjustment
1. Turn a power supply of Radio into OFF once, and please make it ON once again.
2. Adjust it by Hardware Parameter setting function of CPS.
3. Adjust it from Squelch Sensitivity(Normal).
Turn frequency of RF SG into frequency of a screen.
Please adjust Carrier Level of SG to become 10dB SINAD.
4. Click Auto Tune button in a frame of Squelch Sensitivity(Normal) of a screen.
5. Adjust Squelch Sensitivity(Tight) next.
4db please up than 10dB SINAD value with Carrier Level of SG.
6. Click Auto Tune button in a frame of Squelch Sensitivity(Tight) of a screen.
7. Click OK button.
8. Click Program button, then Radio is programmed.
4-4-3 Battery Alert Adjustment
1. Connect the Radio in accordance with Figure 4.
Adjust by hardware parameter setting function of CPS.
2. Please click a frame of Battery Alert.
3. Adjust from Battery Low Alert.
Set the voltage of DC Power Supply in 6.2 V.
4. Please click Auto Tune button.
5. Adjust Battery Over Alert next.
Set the voltage of DC Power Supply in 5.8 V.
6. Please click Auto Tune button.
7. Please click OK button.
8.
Click Program button, then Radio is programmed
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