Possible partial cure for simulcast distortion on TRX-2

[jonwienke]

If it works, it works. Way to go. Lot's of negativity on this site, mostly from people pimping products (SDS line). Not every system is the same, not all locations are the same, not everyone has $700 to throw down on a radio because not everyone is rich. Thanks for sharing PDHall54.

I'm not pimping anything here. And I've had pretty much identical conversations with users of the "other brand" of scanners. Scanning too much stuff can cause problems with any brand or model scanner, including the SDS line. But that has nothing to do with simulcast.

Pointing out that something is inaccurate misinformation isn't "negativity", it's a public service to the community. These forums are supposed to be a place where accurate and useful information is shared, not old wives' tales and absurdities.

 

[Arkmood]

If it works, it works. Way to go. Lot's of negativity on this site, mostly from people pimping products (SDS line).

Finally people are starting to comprehend what is going on...

 

[pdhall54]

You aren't doing yourself or anyone else any good by spreading misinformation.

OK, don't know you and this is the first time we've exchanged comments on this RR forum but would like to know what gives you the right to be judge, jury and executioner to accuse me of spreading misinformation? Did you help design/code/build the TRX? Can you explain your conclusions or are they just your opinion pulled out of your butt?
All I did was make a simple suggestion based on my testing and all you've done is nothing but constantly making negative comments and accusations.
You know, I thought these forums were supposed to be a sounding board for people to ask/answer questions, provide information and the keyword, HELP your fellow hobbyists and professionals that use this equipment. Jonathan, you need to really dial back on tearing down people and try to be a positive influence.

 

[jonwienke]

Actual simulcast reception problems are caused by multiple transmitters transmitting on the same frequency at the same time, and the receiver having difficulty correctly decoding bits from the multiple overlapping signals on the same frequency. When you have a simulcast reception problem on frequency A, changing the scanner settings for receiving frequency B, or locking out frequency B so it is no longer scanned, will never have any effect whatsoever on how actual simulcast problems are handled on frequency A.

In order to have any effect on simulcast reception quality for frequency A, you have to change the settings for frequency A. You can't solve a reception issue on frequency A by changing any setting that only affects frequency B. It doesn't matter what brand or model of scanner or receiver you're talking about. This exact same old wives' tale crops up in other forums devoted to other brands and models, and it's just as wrong there, too.

There are perfectly valid reasons for locking out sites and/or site frequencies in a multi-site trunked radio system, and doing so can increase the amount of traffic you hear. But none of those reasons have anything to do with simulcast, and if locking out a site or frequency is beneficial, doing so will be beneficial regardless of whether or not simulcast is involved.

 

[Ubbe]

The more time you can spend on the actual control channel the higher are the chance of decoding something that can be heard.

What happens are probably that when the scanner detects to many errors on the control channel it instead tries to find another control channel and spends time trying to decode control data from the voice channels and secondary control channels you have programmed to that site.

Stripping the site from everything except the actual working control channel will let the scanner spend all the dwell time and TG delay time on that single control channel frequency.

It would probably also help if you increased the dwell time and TG delay times.

The same tactics also works on Uniden scanners that are not SDS models and on all scanners when signals are weak and difficult to decode.

/Ubbe

 

[mikewazowski]

And we’re done.

Some people need to learn that you’re not always going to change someone’s mind and you’re better off cutting your losses and walking away.