Radio Shack PRO-90 - Manual (Page 21)

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Notes:
• If you have not stored frequencies into any chan-
nels, the scanner does not scan.
• If the scanner picks up unwanted, partial, or very
weak transmissions, turn SQUELCH counterclockwise
to decrease the scanner's sensitivity to these sig-
nals. If you want to listen to a weak or distant sta-
tion, turn
SQUELCH clockwise.
• If SQUELCH is adjusted so you always hear a hissing
sound, the scanner does not scan properly.
STORING KNOWN FREQUENCIES
INTO CHANNELS
Good references for active frequencies are the Ra-
dioShack “Police Call Guide including Fire and Emer-
gency Services,” “Official Aeronautical Frequency
Directory,” and “Maritime Frequency Directory.” We up-
date these directories every year, so be sure to get a
current copy.
Note: To store trunking system frequencies, see “Pro-
gramming Trunked Frequencies” on Page 34.
Follow these steps to store frequencies into channels.
1. Press MANUAL , enter the channel number where you
want to store a frequency, then press MANUAL again.
The channel number appears.
2. Use the number keys and • to enter the frequency
(including the decimal point) you want to store.
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