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PA2AGA > HDDIG 24.07.00 03:21l 171 Lines 6117 Bytes #-9305 (0) @ EU
BID : HD_2000_198D
Read: GUEST
Subj: HamDigitalDigest 2000/198D
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Sent: 000723/1756Z @:PI8HGL.#ZH1.NLD.EU #:63649 [Den Haag] FBB $:HD_2000_198D
From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Sun, 23 Jul 00 16:56:19 MET
Message-Id: <hd_2000_198D>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
>
> 1) Are there still RTTY nets that happen at a regular time daily,
> weekly or a freq there I will usualy find RTTY?
>
> 2) I found what I thought was a RTTY station and I tried and tried
> (with a very good signal) but I think I have the baud incorrect. When
> I was in it before (On VHF) we usualy used 60 Word per min (45 Baud)
> and Mars used 100 Words per min (I do not remember the baud that goes
> along with that, I tried 75 baud but I still could not copy)
>
> 3) I was on 40 meters and was using LSB that is what I use for phone
> in that band.
>
> 4) Is the PK232 Obsolete? Is there upgrades available or should I just
> purchase a new interface? If so which ones are good at a resanable
> price?
>
> Thanks for any help you pass along
>
> Delbert McCord
> KA8OCN
> dmccord@usol.com
------------------------------
Date: Sat, 22 Jul 2000 15:42:28 GMT
From: Baldur Norddahl <bbn@nkdev.dk>
Subject: tones???
Rob Janssen wrote:
> Stewart Slee <sleesa@powerup.com.au> wrote:
> >Please can you direct me to a place where i can find the tones used for
> >above 1200bd fsk and afsk ( also what is the difference) packet radio and
> >also what is the type of modulation used for 9600bd and above????
>
> FSK = the RF carrier is moved over a certain offset to transfer 0 or 1.
> no tones involved. the parameter is the offset between the frequencies.
>
> AFSK = an audio tone is modulated on the carrier, normally using FM
> modulation (when it is done using SSB, the result is the same as FSK).
> there are two tones. for 1200 baud they are 1200 and 2200 Hz.
>
> 9600 baud is normally done using FSK.
>
> Rob
> --
> +----------------------------------+--------------------------------------+
> | Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
> | AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
> +----------------------------------+--------------------------------------+
I have an old 1200 baud TNC2 modem but I want to experiment by hooking the
radio
up to my computer using the soundcard. Detecting 1200 and 2200 Hz tones would
not
be hard. The radio (Kenwood TM-451E) is supposely 9600 ready, but you are
saying
I wont be able to detect that on the computer?
Baldur
------------------------------
Date: Sat, 22 Jul 2000 15:43:23 GMT
From: Baldur Norddahl <bbn@nkdev.dk>
Subject: tones???
Rob Janssen wrote:
> Stewart Slee <sleesa@powerup.com.au> wrote:
> >Please can you direct me to a place where i can find the tones used for
> >above 1200bd fsk and afsk ( also what is the difference) packet radio and
> >also what is the type of modulation used for 9600bd and above????
>
> FSK = the RF carrier is moved over a certain offset to transfer 0 or 1.
> no tones involved. the parameter is the offset between the frequencies.
>
> AFSK = an audio tone is modulated on the carrier, normally using FM
> modulation (when it is done using SSB, the result is the same as FSK).
> there are two tones. for 1200 baud they are 1200 and 2200 Hz.
>
> 9600 baud is normally done using FSK.
>
> Rob
> --
> +----------------------------------+--------------------------------------+
> | Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
> | AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
> +----------------------------------+--------------------------------------+
I have an old 1200 baud TNC2 modem but I want to experiment by hooking the
radio
up to my computer using the soundcard. Detecting 1200 and 2200 Hz tones would
not
be hard. The radio (Kenwood TM-451E) is supposely 9600 ready, but you are
saying
I wont be able to detect that on the computer?
Baldur
------------------------------
Date: Sat, 22 Jul 2000 18:27:27 GMT
From: nomail@rob.knoware.nl (Rob Janssen)
Subject: tones???
Baldur Norddahl <bbn@nkdev.dk> wrote:
>Rob Janssen wrote:
>> Stewart Slee <sleesa@powerup.com.au> wrote:
>> >Please can you direct me to a place where i can find the tones used for
>> >above 1200bd fsk and afsk ( also what is the difference) packet radio and
>> >also what is the type of modulation used for 9600bd and above????
>> FSK = the RF carrier is moved over a certain offset to transfer 0 or 1.
>> no tones involved. the parameter is the offset between the frequencies.
>> AFSK = an audio tone is modulated on the carrier, normally using FM
>> modulation (when it is done using SSB, the result is the same as FSK).
>> there are two tones. for 1200 baud they are 1200 and 2200 Hz.
>> 9600 baud is normally done using FSK.
>> Rob
>> --
>> +----------------------------------+--------------------------------------+
>> | Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
>> | AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
>> +----------------------------------+--------------------------------------+
>I have an old 1200 baud TNC2 modem but I want to experiment by hooking the
>radio
>up to my computer using the soundcard. Detecting 1200 and 2200 Hz tones would
>not
>be hard. The radio (Kenwood TM-451E) is supposely 9600 ready, but you are
>saying
>I wont be able to detect that on the computer?
No I am not saying that... because of the low-frequency requirements
(remember, it does not use tones) it will not work very well, but it can be
done. Software exists that does it.
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
------------------------------
End of Ham-Digital Digest V2000 #198
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