Transmit 20 Khz Modulation Tuning - Motorola P100 Serie Servicehandbuch

Radio Programming and Tuning: Transmitter Alignment Options

5.5.3.3 Transmit 20 kHz Modulation Tuning

1. Under the Alignment menu, select Tx Modulation, then select Mod. 20 kHz (Figure 5-6. Tx
Modulation 20 kHz Window).
2. Press PTT Toggle. This will key up the radio at the F1.
3. Read the Modulation from the Service Monitor.
4. Change the modulation setting until the Tx deviation value (in Service Monitor) lies in the range of
the 20 kHz channel (as shown in Table 5-3.) by using either the Left/Right arrows on the slider or
Up/Down arrows on the Working Softpot box.
5. Press PTT Toggle to dekey the radio.
6. Goto the next frequency point by clicking on the next Working Softpot value and press PTT
Toggle.
7. Repeat steps 3–5 for the remaining test frequencies (F2–F5).
8. Press Program to commit the softpot values into the codeplug.
9. Exit the Transmit 20 kHz Modulation function.
10. If 25 kHz channels are used, perform Transmit 25 kHz Modulation Tuning.
F1
F2
F3
F4
F5
Figure 5-6. Tx Modulation 20 kHz Window
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