C. Crane BC75XLT - Manual (Page 28)

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Adjust Squelch
The scanner recognizes signals as transmissions if they
exceed a signal strength threshold. Adjusting the squelch
sets this threshold level. increasing squelch requires a signal
to be stronger to be seen as a transmission. if you set the
squelch too high, you will risk not receiving transmissions
that are lower than that threshold. reducing the squelch
allows weaker signals to be accepted. However, if you lower
the squelch too much, you will hear white noise all the time.
1. Press Func and the press down and release the scroll
control knob. SqL and a number display.
2. Turn the knob until the interference is gone. Press the
scroll control knob again to set the level and return to
the previous function.
Adjusting for Interference
There are several options to adjust your scanner to minimize
interference. Try:
• Moving the scanner or its antenna away from the
source.
• Using an optional external antenna designed for multi-
band coverage. (You can purchase this type of antenna
at a local electronics store). if the optional antenna has
no cable, use 50-70 ohm coaxial cable for lead-in. An
adapter might be necessary for the optional antennas.
• Moving the scanner from high-moisture environments
such as the kitchen or bathroom.
• Moving the scanner from direct sunlight or near heating
elements or vents.