Radio Shack 20-164 - Manual (Page 9)

16
Installation
17
Setup
You can reduce interference using two
attenuator modes:
• Global – (Default) The attenuator setting is
applied to all channels, bands, or groups.
• Normal – Lets you set the attenuator in
each channel, band, or group.
Note: You cannot set the attenuator
while scanning.
To set the attenuator mode:
1. To set Global mode, press FUNC and then
ATT. On the display
“G” appears.”
2. To set Normal mode, press FUNC and
then ATT. On the display
“G” disappears.
Then for each channel:
• On – Press
ATT. “A” appears.
• Off – Press
ATT again.
“A” disappears.”
Note: You cannot set the attenuator
while scanning.
Scanner Setup
A frequency, expressed in kHz or MHz, is the
tuning location of a station.
Your scanner saves frequencies to channels
and groups the channels into banks. The
scanner’s 10
banks each hold 100 channels
(1,000 channels total).
The scanner is preset to the most common
AM or FM receive modes for each frequency
range. However, some amateur transmissions
may operate in a different mode. If the
transmission sounds weak or distorted,
you may have the channel set to the wrong
receive mode:
AM – Amplitude Modulation, primarily used
for aircraft, military, some amateur and
government transmissions.
FM – Frequency Modulation, used for most
public safety transmissions, broadcast,
business, and most amateur radio
transmissions.
CT – FM transmissions with Continuous Tone
Coded Squelch System (CTCSS)
DC – FM transmissions with Digital Coded
Squelch (DCS)
MO – Motorola Trunking System
ED – EDACS Trunking System
LT – LTR Trunking System