Psr500
DSP = Digital Signal Processor
This is basically a microprocessor dedicated to and optimized for running algorithms that clean up and process digital signals used for communications (including but not limited to digital data that reflects audio including voice and music). In the case of the PSR500 the DSP is used to process the P25 digital voice decoding. It may also digitally decode analog FM (this is possible and done in some devices) rather than use a dedicated standard FM demodulation circuit but I don't think so in the PSR500's case. The firmware for the DSP can be updated separately from the firmware for the CPU which is the central processor commanding the overall unit.
Gregmoss,
That's odd! As I recall, all of the other posts I have read comparing the Uniden scan speed to the GRE unit seem to indicate that the GRE is faster. I don't have a Uniden to compare to myself so I can't really say. In any case, if your unit seems unusually slow I would check the programming. I don't know of any actual dedicated "scan speed adjustment" that can be changed but I think there are some expert settings that can be adjusted to make it scan faster albeit with a possible adverse effect in that the scanner may scan too fast for it to consistently lock on signals so you might miss some transmissions. However, I would check your Multi-Site mode settings. If you are using MultiSite and have it set to Stat it could really slow the apparent scan speed, particularly if you have the "Check all CC" option enabled, because the scanner has to check each CC in a TSYS (with that option enabled) before moving on to the next. I would make sure MultiSite is set to OFF on all of your TSYS's as a first option. Of course if you need to do this then you will have to accept the compromise in apparent scan speed.
My unit is packed full memory-wise and, as far as I can tell, it does pretty darn good in terms of scan speed! In any case, glad you are enjoying your new unit (despite the speed issue)!
-Mike
all of the bells and whistles..
