Transmit 25 Khz Modulation Tuning; Figure 5-6. Tx Modulation 25 Khz Window - Motorola CP185 Basic Service Manual

Radio Programming and Tuning: Transmitter Alignment Options

5.5.3.2 Transmit 25 kHz Modulation Tuning

1. Under the Alignment menu, select Tx Modulation, then select Mod. 25 kHz

(Figure 5-6. Tx Modulation 25 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 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 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.
Figure 5-6. Tx Modulation 25 kHz Window
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