MTR3000 Programming and Tuning: Tuning Setup (Wireline) 13-13
5. Select “Wireline Squelch Level” under the Tx menu in the tree view (Refer to Figure 13-10).
Figure 13-10 Tx Menu tree (Wireline Squelch Level)
6. Enter the tuning frequency into the Communication Analyzer (the value displayed on the
Tuner GUI under the heading of “Frequency Points”).
7. Click the backplane “PTT Toggle” button within the Tuner environment to key up the radio.
8. Adjust the softpot value until the Communication Analyzer indicates that the deviation has
dropped out (< 100 Hz of deviation).
9. Click the “PTT Toggle” button within the Tuner environment to de-key the radio.
10. Click “Write” to save the new tuned softpot value into the radio’s codeplug.
Note
If enabled, the Wireline’s Automatic Level Control (ALC) and Wireline Squelch Hysteresis
features are automatically turned off when the radio is keyed up from the “PTT Toggle”
button within the Tuner environment. The features are automatically re-enabled when the
radio is de-keyed by pressing the “PTT Toggle” button or when leaving the Tuner
environment.
Note
The Wireline's Automatic Level Control (ALC) alignment procedure can result in a difference
between the Wireline Squelch Threshold set during this procedure and the actual value
observed in normal operation. This difference can be eliminated or minimized, by carefully
following the Wireline Transmit Level tuning procedure found in Section 13.5.4 on page 13-
10 to obtain an accurate alignment.
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