Radio-shack PRO-2040 User Manual download pdf (Page 19)

6. Adjust

VOLUME

to a comfortable

level.

7. Slowly turn

SQUELCH

clockwise

until the hissing noise stops.

Squelch Tips:

• If the scanner picks up

unwanted or weak transmis-

sions, slightly turn

SQUELCH

clockwise to decrease receiver

sensitivity.

• If the scanner does not pick up

any transmissions, slightly turn

SQUELCH

counterclockwise to

increase receiver sensitivity.

FINDING BIRDIE

FREQUENCIES

Birdies are operating frequencies

generated and used inside the scan-

ner’s receiver. These operating fre-

quencies could interfere with

broadcasts on the same frequencies

and make them difficult or impossible

to receive.

These are the most common birdies

to watch for:

31.0500 MHz 134.550 MHz

127.2500 MHz 136.050 MHz

128.1875 MHz 138.050 MHz

128.2500 MHz 140.275 MHz

129.6875 MHz 144.900 MHz

132.0500 MHz 171.250 MHz

132.2625 MHz

If you store one of these frequencies

into a channel, you might hear only

noise when the scanner stops on that

frequency. If the interference is not

severe, you might be able to turn

SQUELCH

clockwise to cut out the

birdie.

To find your scanner’s specific bird-

ies:

1. Disconnect the antenna and

move it away from the scanner.

Note: Make sure that no other

nearby radios or TVs are turned

on.

2. Search every frequency band

from its lowest frequency to the

highest (see “Searching For and

Temporarily Storing Active Fre-

quencies”).

If searching stops (as if the scanner

had found a signal) but there is no

sound, that frequency might be a

birdie.

For future reference, record all the

birdies in your particular scanner.

20-414.fm Page 19 Wednesday, August 4, 1999 11:12 AM

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 43 44

Comments to this Manuals

No comments

Radio-shack PRO-2040 User Manual Page 19

Comments to this Manuals

Related products and manuals for Scanners Radio-shack PRO-2040