> Flat Audio through a repeater simply means that the repeater
> does not mess with the audio through-put.
Most two-way radio people never use the term flat audio repeater. We
would assume most standard voice audio repeaters operate as the
mentioned so the "flat audio repeater" has never reall
>>> The End-to-End audio path is flat through the repeater.
>>> There is no de-emphasis or pre-emphasis going on inside
>>> the repeater audio path. The repeater receiver leaves the
>>> audio alone, the controller leaves it alone, and the
>>> repeater transmitter leaves it alone.
>> In real
> mch <[EMAIL PROTECTED]> wrote:
> Well, most of the two-way industry doesn't really care about
> repeater audio the way hams do.
And your point is..?
> If you can understand what the other person is saying, it's
> good enough.
Just depends on who owns and operates the equipment. Crappy aud
> > But an over deviated new radio doesn't sound crappy in the typical
> > operators hands. It often sounds pretty darn good/loud. So the
> > mfgrs keep sending them out "hot" and few people complain about
> > it.
> And repeaters which 'fix' the problem for them doesn't help, either.
By the natu
skipp025 wrote:
>
> > The End-to-End audio path is flat through the repeater. There is
> > no de-emphasis or pre-emphasis going on inside the repeater audio
> > path. The repeater receiver leaves the audio alone, the controller
> > leaves it alone, and the repeater transmitter leaves it alone.
>
skipp025 wrote:
>
> > Actually, 'flat response' is better. Since the de-emph/pre-emph
> > changes the audio intentionally, the term 'processed audio' is
> > more applicable to such a repeater.
>
> I and probably most of the two-way radio industry do not agree. It's
> really about what part of the
Gentlemen,
I've been sitting in the wings following this thread, and I think it's time
I added my 2¢ worth...
First of all, I'm not in the business, but I am in the hobby. If I read
Part 97 correctly, the FCC requires that >>I<<, as the control
operator/trustee of a repeater, ensure that **my*
At 3/14/2007 17:01, you wrote:
>You completely missed the point. It's not up to the repeater to fix user
>problems. Yes, it would be nice if all hams could properly maintain
>their equipment. It would be nice if they could install a 3-wire CTCSS
>encoder that has +, ground, and audio out. It would
Again, controlling deviation has nothing to do with the audio components
of the signal. The audio does not change based on the deviation. (short
of audible distortion if it exceeds the passband)
I agree it is your responsibility to make sure that your TX does not
overdeviate, but there is absolute
skipp025 wrote:
>
> > mch <[EMAIL PROTECTED]> wrote:
> > Well, most of the two-way industry doesn't really care about
> > repeater audio the way hams do.
>
> And your point is..?
The point is that you cannot compare an industry where 'intelligible is
good enough' is the standard for most to an i
> Most times when we hear or read about the term flat audio... our
> attention is normally directed toward the demodulated audio sections
> of the repeater hardware. Or at least our attention should normally
> be directed at the demodulated audio stages.
>
> When you look at the global repeate
skipp025 wrote:
>> mch <[EMAIL PROTECTED]> wrote:
>> In the real world, if someone's radio sounds crappy, it needs
>> fixed by someone or the radio will get a (well deserved) reputation
>> as a POS and people need to know to not buy that model.
>
> But an over deviated new radio doesn't sound c
> Most two-way radio people never use the term flat audio repeater. We
> would assume most standard voice audio repeaters operate as the
> mentioned so the "flat audio repeater" has never really been applied
> by Industry as a real description. Some Amateurs seem to want to
> apply the label a
Then there's DTMF..
DTMF decoders HATE the high tone being louder than the low tone.
With pre-emphasized audio and a "flat" receiver, that's what you'll get.
In the telco world, this is called "reverse twist".
Typical DTMF chips work over a 30dB range in amplitude.
If your DTMF decode shows any
skipp025 wrote:
>
> > > But an over deviated new radio doesn't sound crappy in the typical
> > > operators hands. It often sounds pretty darn good/loud. So the
> > > mfgrs keep sending them out "hot" and few people complain about
> > > it.
>
> > And repeaters which 'fix' the problem for them does
At 3/15/2007 09:48 AM, you wrote:
> > Then there is the adjacent channel interference they create. There
> > is nothing you can say that will convince me that any repeater can
> > solve that problem.
>
>Wide doesn't always equal an interference problem.
..if your channel spacing is 20 or 25 kHz.
Yes, you should de-emph the audio going to a DTMF deocder and autopatch,
and pre-emph the audio coming from the autopatch is using a flat audio
response system.
Joe M.
david vanhorn wrote:
>
>
> Then there's DTMF..
>
> DTMF decoders HATE the high tone being louder than the low tone.
> With pre
At 3/15/2007 12:48 PM, you wrote:
>Yes, you should de-emph the audio going to a DTMF deocder and autopatch,
>and pre-emph the audio coming from the autopatch is using a flat audio
>response system.
...hence the source of all the confusion: to build a "flat audio response"
system you need to put d
Yes, you have to make all the audio preemphasized (from the autopatch IF
USED) to match the user's audio which is preemphasized. I would not
phrase it as "put de-emphasis on this & that & pre-emphasis & that & the
other" since that also describes processed audio systems.
In most current configurat
At 3/15/2007 20:18, you wrote:
>Yes, you have to make all the audio preemphasized (from the autopatch IF
>USED) to match the user's audio which is preemphasized. I would not
>phrase it as "put de-emphasis on this & that & pre-emphasis & that & the
>other" since that also describes processed audio s
- Original Message -
From: "Jeff DePolo" <[EMAIL PROTECTED]>
To:
Sent: Thursday, March 15, 2007 10:43 AM
Subject: RE: [Repeater-Builder] Re: Flat Audio
>> Most two-way radio people never use the term flat audio repeater. We
>> would assume most standard voice audio
Milt wrote:
> Remembering of course that a PURC station was designed for PAGING service...
> If you have ever had to set levels in a paging or fire dispatch system that
> used the very low end tones just above the PL range you know real fast why
> the "flat audio board" was created.
>
> Milt
>
I seem to remember it being a jumper inside the radio, which
means you'll need the manual/book.
skipp
(Guys can go blind for other reasons... the specific reason
often depends on your actual age)
> [EMAIL PROTECTED] wrote:
>
> Hi all!
>
> Maybe I'm going blind (after reading all the smal
At 10:53 AM 04/28/06, you wrote:
>I seem to remember it being a jumper inside the radio, which
>means you'll need the manual/book.
Or go to the 16-pin plug description web page at www.repeater-builder.com
Click on Motorola, then Maxtrac, then look for something titled
something like "The definitiv
The document is on the Batlabs site.
Mike
-- Original message -- From: "skipp025" <[EMAIL PROTECTED]> > I seem to remember it being a jumper inside the radio, which > means you'll need the manual/book. > > skipp > > (Guys can go blind for other reasons... the specif
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