Transmit 12.5 Khz Modulation Tuning - Motorola P100 Serie Servicehandbuch

5-8
d. On R2600, select "AUD" under "CURSOR ZONE":
i. Fixed 1kHz: 0.100V. Enable (~)
ii. Synth: Disable (x)
iii. DTMF: Disable (x)
iv. External: Disable (x)

5.5.3.2 Transmit 12.5 kHz Modulation Tuning

1. Under the Alignment menu, select Tx Modulation, then select Mod. 12.5 kHz
(Figure 5-5. Tx Modulation 12.5 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 12.5 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. Go to 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 12.5 kHz Modulation function.
10. If 20 kHz channels are used, perform Transmit 20 kHz Modulation Tuning.
F1
F2
F3
F4
F5
Radio Programming and Tuning: Transmitter Alignment Options
Figure 5-5. Tx Modulation 12.5 kHz Window