When I press and hold the 'Func' button and I tap the 'scroll control', does the radio adjust the audio muting level or the squelch open level?
The user manual doesn't say and the best I can come up with on the internet is this from Uniden and :
http://www.patentgenius.com/patent/5548832.html
I would have expected a more accurate description, seeing as how the patent is not just a technical description but also a legal one. But it's the most detailed explanation I have been able to find.
The user manual doesn't say and the best I can come up with on the internet is this from Uniden and :
http://www.patentgenius.com/patent/5548832.html
It has been contemplated to activate the display light source coincidentally with the activation of the squelch signal output from the receiver. As such, the display light source would illuminate whenever the receiver squelch opened. This isnot a completely satisfactory solution because sometimes the received signal which caused the squelch to open will remain active for an extended period of time, and cause needless current drain from the battery. In such a situation, the user need onlyview the display at the beginning of the signal reception. Further, such a scheme does not deal with the situation where there is sufficient ambient light to view the display, in which case, the display light source need not be illuminated at all.
SUMMARY OF THE INVENTION
In one embodiment, a portable scanning radio receiver is disclosed which includes a liquid crystal display with an incandescent backlight. The display indicates the presently received channel or frequency coincidentally with the activation of asignal present output from the receiver. The signal present output is a conventional squelch signal, but may alternatively be a tone coded squelch or digital squelch signal. In any case, the output has a first state indicating the presence of areceived signal and a second state indicating the cessation of the received signal.
If an auto-light function is enabled, then a controller illuminates the backlight and starts an interval timer. The controller extinguishes the backlight at the occurrence of either the expiration of the interval timer or the cessation of thesignal present output from the receiver.
I would have expected a more accurate description, seeing as how the patent is not just a technical description but also a legal one. But it's the most detailed explanation I have been able to find.