5-12 Radio Programming and Tuning: Receiver Tuning
5.6.5 Receive 25 kHz-Band Tight Squelch Tuning
1. Under the Alignment menu, select Rx Squelch, then select Squelch 25 kHz-band Tight.
(Figure 5-14. Rx 25 kHz-band Tight Squelch Tuning Window).
2. Apply a RF signal (with 1 kHz tone at 3.0 kHz deviation) for current frequency point with minimum
amplitude, -128 dBm (F1 being the first).
3. Set softpot to minimum (0) and adjust the amplitude of RF signal to the range of tight squelch
tuning (as shown in Table 5-8.) on the test equipment.
4. Adjust the softpot value by using either the Left/Right arrows on the slider or Up/Down arrows on
the Working Softpot box until the radio is totally muted.
5. Repeat steps 2–4 for F2–F5.
6. Press Program to commit the softpot values into the codeplug.
Figure 5-13. Rx 25 kHz-band Normal Squelch Tuning Window
F1
F2
F3
F4
F5
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