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UB335ZH.book Page 100 Friday, March 17, 2006 4:35 PM
Using the Close Call Feature
Your scanner's Close Call™ feature lets you set the scanner so it detects, displays
the frequency of, and lets you hear a nearby strong radio transmission. You can
set the scanner so the Close Call feature works "in the background" while you are
scanning other frequencies, turn off normal scanning while the Close Call feature
is working, or turn off the Close Call feature and use the scanner normally. You can
set the scanner so it alerts you when the Close Call feature finds a frequency. You
can also set the frequency band where you want the scanner to look for
transmissions.
To toggle Close Call mode, press [SQ/
or CC Pri(
) and their indicating icons appear on the display. Normal operation
is briefly interrupted about every 2 seconds.
Notes:
• The Close Call feature works well for locating the source of strong local
transmissions such as mobile and handheld two-way radios in areas with no
other strong transmission sources. Several factors affect Close Call
performance, however. Performance is increased with higher transmit power,
receive antenna tuned to the target band, and a low background RF level.
Other than the antenna, you have no control over these factors, but they
explain why performance might vary by both location and time.
• The Close Call feature cannot detect satellite dishes or any transmitter with a
frequency above or below the frequency ranges listed under the Set CC
Bands: option on Page 102.
• The Close Call feature works better with some types of transmissions than
others. It might not correctly display frequency information for transmitters
using a highly directional antenna (such as an amateur radio beam antenna) or
if there are many transmitters operating at the same time in the same area.
Setting Close Call Options
[MENU]
Close Call
Next, turn the Scroll Control
Close Call Only — Lets you set the scanner only for Close Call searching. The
scanner does not scan frequencies or channels when this option is turned on. To
select this option, press
CC Auto Store — Lets you select whether the scanner automatically stores
Close Call hits into channels. If you turn this option on, the scanner starts Close
100
]. When the feature is on, CC DND(
to select an option.
.
)
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