kenwood radio & numeric data

kenwood radio & numeric data

[chappaz alexandre]

Hi guy

I've got a new question for U if you've got time to thing of it.....I wrote 
yesterday to get informations about the Kenwood tm700... radio & Tnc.... Well 
I think I wont manage to achieve what I want using the internal TNC...... 
That's why I write again to ask if anyone could give a little help for 
choosing a nice modem (either hardware or software with a sound card) to 
transmit numeric data over radio with the smallest delay possible....... The 
"packet radio" protocol limits the use I want to have because the goal for me 
would be to have a constant data stream over the radio. So if someone knows 
what kind of material i should use it would be really helpful.....

Thanks a lot

Alex

Re: kenwood radio & numeric data

[Dennis Boone]

 > That's why I write again to ask if anyone could give a little help
 > for choosing a nice modem (either hardware or software with a sound
 > card) to transmit numeric data over radio with the smallest delay
 > possible....... The "packet radio" protocol limits the use I want to
 > have because the goal for me would be to have a constant data stream
 > over the radio.

What kind of range do you need?  Does the link need to be full duplex?

Most ham gear will not provide a full duplex link.  You may need to
check your local regulations regarding commercial use of the ham bands,
or using ham gear on commercial frequencies.

If it would provide the range you need, you might look into a pair
of old Ricochet modems, which run on the 900 MHz band.  They can be
used in point-to-point mode, act like Hayes modems, and would provide
essentially a full duplex serial channel at 128kbps.  In the US, they
are classified as part 15 devices, i.e. type accepted or certified
or whatever, no user license required.  These units sell for $20 or
so on eBay, and a fair number of them seem to be available.

Dennis Boone
KB8ZQZ

Re: kenwood radio & numeric data

[chuck gelm]

chappaz alexandre wrote:

>Hi guy
>
>I've got a new question for U if you've got time to thing of it.....I wrote 
>yesterday to get informations about the Kenwood tm700... radio & Tnc.... Well 
>I think I wont manage to achieve what I want using the internal TNC...... 
>That's why I write again to ask if anyone could give a little help for 
>choosing a nice modem (either hardware or software with a sound card) to 
>transmit numeric data over radio with the smallest delay possible....... The 
>"packet radio" protocol limits the use I want to have because the goal for me 
>would be to have a constant data stream over the radio. So if someone knows 
>what kind of material i should use it would be really helpful.....
>
>Thanks a lot
>
>Alex
>  
>
Hi, Alex:

 I have questions also.  Your goal seems to be:
"have a constant data stream over the radio".

I do not think that it matters that the data is numeric or other.

Why do you use radio?
Why do you use Amateur Radio?
Why do you use AX.25?
Would 802.11b ( 11 Mbps ) be close enough to 'constant' ?

The closest thing I am aware of that supports 'constant data stream',
or at least constant small delay, is ATM.

If you want 'constant', you need 'full duplex'.
 i.e. You need full duplex radios.  Perhaps a
'dual bander' capable of full duplex would suit your goal.


Regards, Chuck

RE: kenwood radio & numeric data

[Morgan.Wemanis]

Hi Alex,

Have a look at radiometrix stuff.
http://www.radiometrix.co.uk/

73 de Morgan, sm6tky

-----Original Message-----
From: linux-hams-owner@vger.kernel.org [mailto:linux-hams-owner@vger.kernel.org] On Behalf Of chappaz alexandre
Sent: Tuesday, October 12, 2004 5:15 PM
To: linux-hams@vger.kernel.org
Cc: André HONIG
Subject: kenwood radio & numeric data

Hi guy

I've got a new question for U if you've got time to thing of it.....I wrote 
yesterday to get informations about the Kenwood tm700... radio & Tnc.... Well 
I think I wont manage to achieve what I want using the internal TNC...... 
That's why I write again to ask if anyone could give a little help for 
choosing a nice modem (either hardware or software with a sound card) to 
transmit numeric data over radio with the smallest delay possible....... The 
"packet radio" protocol limits the use I want to have because the goal for me 
would be to have a constant data stream over the radio. So if someone knows 
what kind of material i should use it would be really helpful.....

Thanks a lot

Alex

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