User Manual

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The squelch is always shown in dBm units. To adjust the squelch control,
first tune to an unoccupied frequency that produces only noise. Increase the
squelch until the receiver is muted. You will see the red-colored segment of
the S-meter growing until it gets higher than the current S-meter value. At
that moment the receiver will be muted and the word “squelched” will be
displayed on the S-meter. Add a few dB extra (to allow a margin for
background noise fluctuation on the band). Now when you tune to an
occupied frequency, if its signal strength is higher than the squelch level, the
receiver will be unmuted.
Next to the squelch setting is the Squelch Defeat (Def) button. When
activated, the squelch action will be turned off (it is the same as if the
squelch was set to its lowest level, but more convenient). The red segment
in the S-meter will turn blue to indicate this condition.
It is easy to forget that squelch is active. If the receiver doesn’t seem to be
operational (no sound from the speaker), check the squelch and mute
settings first.
Frequency Stepping
The Frequency Stepping facility makes it possible to specify an arbitrary
frequency step size. To change the step size, click on the associated display
and enter the required value (from 1 Hz to 1 MHz). You can also use the up
and down buttons on the right of the display, to select from commonly used
step sizes. For convenience, you can also use the small slider between the
two buttons.
Frequency Stepping Panel
When the step size is selected, you can step up or down from the currently
displayed frequency using the left/right arrow buttons under the Step size
display. The double-arrow buttons further down will cause stepping by a
step size ten times larger. Stepping can also be done using the keyboard
Pg Up/Down keys.