Using Rf Gain; Cb Courtesy; Maximum Range - Radio Shack TRC-495 Owner's Manual

21-1579.fm Page 12 Thursday, August 5, 1999 9:34 AM

Using RF GAIN

Rotate this control to adjust your
CB's sensitivity when receiving. Nor-
mally, you will leave this control set to
HIGH. This is useful for blocking out
weak stations, while still receiving
nearby stations.
When the SIGNAL/TX
meter indicates more than half scale,
it means that you are receiving a
strong signal. If the signal overloads
or distorts, rotate RF GAIN to the left.
For weak signals, rotate RF GAIN to
the right.

CB COURTESY

Remember these hints when using
your CB:
• Wait for a pause in transmission
before asking for a break.
• If you do not receive an answer
after two calls to a station, let
others use the channel. Try
again later.
• Do not hold down the talk button
when you are not talking. (This
is called dead-keying.)
12
• Help
information about road condi-
tions, and any other reasonable
requests.
• Always yield any channel for
emergency transmissions.

MAXIMUM RANGE

The maximum range and quality of
CB transmissions vary depending on
these conditions:
• The type and quality of antenna
used.
• The height of the antenna's
POWER
mounting location — the higher
the antenna, the better the sig-
nal's range.
• The
mountains and tall buildings limit
the range.
• Weather conditions.
• The number of nearby CBs
operating on the same channel.
• Standing
between the antenna and the
CB. You can check the SWR
between the CB and a mobile or
base-station antenna using an
SWR tester (Cat. No. 21-523).
Follow the instructions supplied
with the SWR tester and the
mobile or base-station antenna
to change the SWR, if neces-
sary.
callers with directions,
surrounding terrain
wave ratio (SWR)
—