On Fri, 24 Mar 2006 12:06:05 GMT, Dan wrote:

I've seen a few posts regarding choppy or garbled audio reception with
the PRO-96. A Google web search of "Pro-96 garbled audio" brings up a
few hits as well. Explanations I have seen:

1. Problems with scanner
2. Encrypted audio (but not being detected as such)
3. Poor signal
4. Faulty/Buggy transmission network (doesn't seem likely as I would
think the PD department would be all over this in a heartbeat...)

I was just wondering if they *actually* did find some issue with the
PRO-96 since it seems to have vanished from the website...

Digital audio will almost never be as clear as analog audio. I say
"almost" because a good technician, given the proper equipment and
enough time, can make a current Motorola digital transmitter sound
hi-fi. But if you drop a few bits of signal, ant there was a change
of audio during those bits, you'll hear garble. Garble is digital's
"noise burst" or "picket fence". Make sure you never drop a bit, and
use 100 KHz bandwidth, and all digital will sound better than analog.

What happened to forward error correction to help in bit loss.

..


"Al Klein" wrote in message
...
On Fri, 24 Mar 2006 12:06:05 GMT, Dan wrote:

I've seen a few posts regarding choppy or garbled audio reception with
the PRO-96. A Google web search of "Pro-96 garbled audio" brings up a
few hits as well. Explanations I have seen:

1. Problems with scanner
2. Encrypted audio (but not being detected as such)
3. Poor signal
4. Faulty/Buggy transmission network (doesn't seem likely as I would
think the PD department would be all over this in a heartbeat...)

I was just wondering if they *actually* did find some issue with the
PRO-96 since it seems to have vanished from the website...

Digital audio will almost never be as clear as analog audio. I say
"almost" because a good technician, given the proper equipment and
enough time, can make a current Motorola digital transmitter sound
hi-fi. But if you drop a few bits of signal, ant there was a change
of audio during those bits, you'll hear garble. Garble is digital's
"noise burst" or "picket fence". Make sure you never drop a bit, and
use 100 KHz bandwidth, and all digital will sound better than analog.

On Sat, 25 Mar 2006 12:09:50 -0600, "JSF" wrote:

What happened to forward error correction to help in bit loss.

Ever hear a new Motorola digital radio? I'd guess there's some ECC or
FEC in there.

Of course they don't cost $400, and they don't scan 30-2000 MHz, or
1000 channels, but they sound better than analog if the system is set
up properly.

Then, again, why doesn't your cell phone have FEC? Same reason? Only
1 channel effectively, and some of them are pretty expensive when they
first come out.

Al Klein wrote:
On Sat, 25 Mar 2006 12:09:50 -0600, "JSF" wrote:


What happened to forward error correction to help in bit loss.


Ever hear a new Motorola digital radio? I'd guess there's some ECC or
FEC in there.

Of course they don't cost $400, and they don't scan 30-2000 MHz, or
1000 channels, but they sound better than analog if the system is set
up properly.

Then, again, why doesn't your cell phone have FEC? Same reason? Only
1 channel effectively, and some of them are pretty expensive when they
first come out.

FEC would be fine but there's always a tradeoff between bandwidth, power
and price.

Cheers.

Ken