Uniden UBC3500XLT 사용자 설명서

65

Your scanner's Close Call

TM

 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 turn Close Call detection on (CC DND, CC PRI) or 
off, press 

 then 

. When CC DND is on, 

 appears on the display. When CC PRI is on, 
 appears on the display and normal operation is 

briefly interrupted about every 2 seconds.

Notes: 

• CC DND (Do Not Disturb) - The scanner checks for 

a Close Call hit every 2 seconds only if the scanner 
is not currently stopped on a transmission. If the 
scanner is on a transmission the scanner waits until 
the signal ends to perform a Close Call check. This 
prevents breaks in audio during Close Call checks.

• CC PRI - Close Call works even if there is a 

transmission. Checks for a Close Call hit every 2 
seconds.

• 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.

UB347ZH.fm  Page 65  Thursday, August 31, 2006  11:57 AM