Transmit 25 Khz Modulation Tuning - Motorola P100 Serie Servicehandbuch

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5.5.3.4 Transmit 25 kHz Modulation Tuning

1. Under the Alignment menu, select Tx Modulation, then select Mod. 25 kHz
(Figure 5-7. Tx Modulation 25 kHz Window).
2. Press PTT Toggle and switch to PTT on the test box. 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 25 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 25 kHz Modulation function.
F1
F2
F3
F4
F5
Radio Programming and Tuning: Transmitter Alignment Options
Figure 5-7. Tx Modulation 25 kHz Window