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Difference between revisions of "Uniden Close Call"

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Close Call™ RF Capture Technology  - Instantly tunes to signals from nearby transmitters.  A Uniden Specific feature for their scanners.
 
Close Call™ RF Capture Technology  - Instantly tunes to signals from nearby transmitters.  A Uniden Specific feature for their scanners.
  
The Close Call feature is also implemented on the RadioShack [[PRO-83]], [[PRO-84]], and [[PRO-2051]] as "Signal Stalker". "Signal Stalker II" (used on some other RS models) is a different frequency detection method implemented on some GRE-made RS models.
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The Close Call feature is also implemented on the RadioShack [[Pro-83]], [[Pro-84]], and [[Pro-2051]] as "Signal Stalker". "Signal Stalker II" (used on some other RS models) is a different frequency detection method implemented on some GRE-made RS models.
  
 
For the Close Call feature to detect a signal, that signal must be about 15-18dB stronger than the RF noise floor in the band being checked. This means that there is no real way to predict the range within which signals will be caught. The factors that influence range, however are:
 
For the Close Call feature to detect a signal, that signal must be about 15-18dB stronger than the RF noise floor in the band being checked. This means that there is no real way to predict the range within which signals will be caught. The factors that influence range, however are:

Revision as of 18:17, 20 February 2006

Close Call™ RF Capture Technology - Instantly tunes to signals from nearby transmitters. A Uniden Specific feature for their scanners.

The Close Call feature is also implemented on the RadioShack Pro-83, Pro-84, and Pro-2051 as "Signal Stalker". "Signal Stalker II" (used on some other RS models) is a different frequency detection method implemented on some GRE-made RS models.

For the Close Call feature to detect a signal, that signal must be about 15-18dB stronger than the RF noise floor in the band being checked. This means that there is no real way to predict the range within which signals will be caught. The factors that influence range, however are:

  • RF Noise Floor in the band (lower noise floor increases range)
  • RF Power Output of the Transmitter (higher power increases range)
  • Antenna being used for receive (too complicated to predict, but it does have an affect :*) )

Note that "RF Noise Floor" in this context includes signals from any other transmitters operating in that band. So, at busy airports, getting a hit might be difficult (lots of VHF signal sources all the time, as well as a few continuous VHF broadcast sources).

The feature is designed to catch signals that are "Close" (hence, the name). While you might not get a hit often, it should be the case that any hit you do get is from a relatively nearby transmitter, so could be of enhanced interest to you.

Uniden Scanners that support close call include: