[1000mp] PCT III Not Legal USA? - Sound Card Digital/Ritty Modes

Sun, 2 Jun 2002 15:43:36 +0200

Hello Bill,

Thanks for your very interesting information!

Without any doubt you are right with the statement that IF-filters improve
the performance of TNC's or soundcards.

When I compare the older TNC's (e.g. PK232 or KAM) with the modern TNC's or
soundcards I see a lot of improvements. With the PK232 I *had to* use the
IF-filters on crowded frequencies, otherwise it was not possible to keep a
good connection. With the modern TNC's (like the SCS PTC-IIpro) and
soundcards the IF-filters *improve* the performance of the connection. That
is what I ment with 'not important anymore'. It was not my intention to
mislead you, hi! It's more a language problem; my native language is Dutch,
after that German and then English.

I was deeply shocked when I read the information about Pactor III! I never
heard or read of this before. This is really bad news. Next month on the Ham
Radio in Friedrichshafen I will talk about this with DL1ZAM from SCS. Pactor
II is such a tremendous success and I hoped that Pactor III would be as
successfull.

www.pactor.info

73!
Hans PA1HR.

e-mail: [email protected]
site: www.remeeus.nl
Ham Radio call: PA1HR

----- Original Message -----
From: "WD8ARZ" <[email protected]>
To: <[email protected]>
Sent: Sunday, June 02, 2002 3:00 PM
Subject: Re: [1000mp] PCT III Not Legal USA? - Sound Card Digital/Ritty
Modes

> Hello Remeeus, very much appreciate your informative reply.
>
> My email was triggered by what I considered a misleading blanket statement
> of the following:
>
> "However... With the modern TNC's (such as the SCS PTC-IIpro) or with a
> soundcard the bandwidth is not important anymore. The DSP of the
> TNC/soundcard handles with the signal, independent of the bandwidth. With
> the new Pactor III mode it is even impossible to use narrow bandwidth!"
>
> I just felt it was important to keep the receiver filter bandwidth issues
in
> perspective when it comes to improving the performance of what Tnc's and
> Sound Cards can do... running wider filters than the mode in use by the
Tnc
> and Sound card program was not the point I think you were trying to make.
>
> Also there is some question of the legality of Pactor III in the United
> States. Please see the attached example of many emails on this topic else
> where.
>
> 73 from Bill - WD8ARZ
> [email protected]
>
> ----- Original Message -----
> From: "nb6z" <[email protected]>
> To: <[email protected]>
> Sent: Monday, May 13, 2002 23:52
> Subject: [DigiMode_HF_Band_Plans] More PCT III info...
>
> I put the following on my website last week. I got this info from
> discussions held on the digitalradio e-group at
> http://groups.yahoo.com/group/digitalradio/. If I am wrong on any of this
> info, I assume some Pactor III op will flame me an email... ;-)
>
>  PACTOR-III is a proprietary mode used for non-amatuer communications. Use
> of Pactor-III protocol is prohibited for US hams and some other countries
> for the following reasons:
>  1 . PACTOR III is not publicly documented, it is illegal for any US
> licensed station to use it (section 97.309(a)4 of the rules).
>  2. There are no bilateral agreements with any other nation permitting the
> use of PACTOR III, it is illegal for any US licensed station to use PACTOR
> III in communication with licensees of any other nation (section 97.309(b)
> of the rules).
>  3. PACTOR III signal may not be used for an automatically controlled
> station (maximum bandwidth is 500 Hz) (section 97.221(c)2 of the rules).
>  4. PACTOR III has a symbol rate higher than 300 baud, operation by US
> licensed stations below 30 MHz would violate 97.307(f)3.
>
> Griff... http://home.teleport.com/~nb6z
>
> ----- Original Message -----
> From: <[email protected]>
> To: <[email protected]>
> Sent: Sunday, June 02, 2002 03:57
> Subject: Re: [1000mp] Sound Card Digital/Ritty Modes - Filters/Rx
> Performance
> >
>
> > Hello Bill,
> >
> > Good filters in early IF-stages are very important for receiver
> performance;
> > without any doubt! This is one of the benefits of rigs like the
> > 1000MP/MarkV.
> >
> > I use a SCS PTC-IIpro for digital modes. You may consider this as a
> high-end
> > TNC which is very advanced.
> >
> > PACTOR-III requires a bandwidth of 2.2 kHz on the HF band, which means
> that
> > it requires more space than PACTOR-II (with 500 Hz) did. That's why a
> speed
> > advantage of factor 3..5 compared with PACTOR-II is achievable, with NO
> > degradation of robustness. The transceivers must be set to the 2400 Hz
> > IF-filters, 500 Hz filters do not work any more.
> >
> > 73, Hans Remeeus PA1HR.
> >
> > e-mail: [email protected]
> > site: www.remeeus.nl
> > Ham Radio call: PA1HR
>
>
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