John Champa wrote:
> Rick,
>
> Now that is some interesting research! More please.
>
> Thanks,
> John
> K8OCL
>
> Original Message Follows
> From: kv9u <[EMAIL PROTECTED]>
> Reply-To: digitalradio@yahoogroups.com
> To: digitalradio@yahoogroups.com
Rick,
Now that is some interesting research! More please.
Thanks,
John
K8OCL
Original Message Follows
From: kv9u <[EMAIL PROTECTED]>
Reply-To: digitalradio@yahoogroups.com
To: digitalradio@yahoogroups.com
Subject: Re: [digitalradio] Re: RSM2400 / MIL-STD-188-110
Date: Fri, 16 Ma
From: "DuBose Walt Civ AETC CONS/LGCA" <[EMAIL PROTECTED]>
Reply-To: digitalradio@yahoogroups.com
To:
Subject: RE: [digitalradio] Re: RSM2400 / MIL-STD-188-110
Date: Fri, 16 Mar 2007 15:27:23 -0500
What if an individual wants high speed AND good low signal leveel
throughput?
I
Bonnie,
Your definition below is not at all my understanding, nor does it square
with anything that I have read on baud rate.
My understanding for many years has been that baud refers to the symbol
rate per second. In other words, the actual changes or transitions
taking place per second.
The
> Rick, KV9U wrote:
> Isn't the baud rate the same 2400 baud, all
> the time for this modem,
Hi Rick,
Perhaps you have been confusing "baud" and "symbols per second".
This is a common mistake many hams have with complex digital formats.
To answer your question...
The MIL STD 188-110 serial
I was able to find some interesting data on poor channel performance of
the 110A modem from one company:
http://www.etools.de/software/telekommunikation/komponenten/milstd188110a.htm
Depending upon the BER you can tolerate, it appears that the 2400 bps
speed can only handle around +10 to +14 S/
t: Re: [digitalradio] Re: RSM2400 / MIL-STD-188-110
Poor Bonnie!
We are hitting you from both directions:
--some want better weak signal performance at the cost of speed (~HF)
--some want more speed at the cost of signal performance (~10M & VHF)
Original Message Follows
From: kv9
The slower speeds are better when the condx is worse,
75 bps and long interleave gets through just about
anything. I have not really had to use it at that
speed , 1200 bps gets through nicely too. I don't know
how good the implementation in RFSM is, my experience
is based upon years of daily use of
--- In digitalradio@yahoogroups.com, kv9u <[EMAIL PROTECTED]> wrote:
>
> If the 110A works this well at 2400 baud, what would happen with slower
> speeds? From what I understand, it does require a good signal to get
> through, perhaps comparable to the WinDRM software at maybe +10 S/N dB
> or ma
gitalradio@yahoogroups.com
To: digitalradio@yahoogroups.com
Subject: Re: [digitalradio] Re: RSM2400 / MIL-STD-188-110
Date: Fri, 16 Mar 2007 09:32:30 -0500
If the 110A works this well at 2400 baud, what would happen with slower
speeds? From what I understand, it does require a good signal to get
through, perhaps
If the 110A works this well at 2400 baud, what would happen with slower
speeds? From what I understand, it does require a good signal to get
through, perhaps comparable to the WinDRM software at maybe +10 S/N dB
or maybe a bit below that?
73,
Rick, KV9U
Per wrote:
> Well, MIL-STD-188-110A use
Well, MIL-STD-188-110A uses a single phase shifted
tone , I guess that made it even more non-intuitive ?
The difference between packet and this MIL-STD is just
huge. Interleaver to fight fade and QRM, equalization
to benefit from multipath and the list could just go
on and on. 300 baud packet is a
Doubt you or Rick are missing anything.
300 baud ax.25 packet works poorly on HF unless near the MUF. I still
like the mode but after 20+ years I agree to its shortcomings...
PAX/PAX2/ARQ FAE all work better at the expensive of
bandwidthax.25 packet at 110 baud works better too when down fr
Now I'm I missing something - I don't seen to have a problem with HF
packet. But then again I don't use a sound card for it either.
At 09:29 PM 3/15/2007, you wrote:
>It still seems a bit non-intuitive that using a 2400 baud rate with two
>tones can work well and yet 300 baud packet hardly work
> John K8OCL wrote:
>
> Haven't the HF-LINK folks been using this mode for over 5 years?
>
Hi John,
Yes. MIL STD 188-110 is in PCALE software (along with standard ALE).
Operators have been using -110 (outside USA) for data files.
I was using the RFSM2400 while I was in Hong Kong, China.
It i
It still seems a bit non-intuitive that using a 2400 baud rate with two
tones can work well and yet 300 baud packet hardly works well at all.
There is something that I am missing here.
73,
Rick, KV9U
expeditionradio wrote:
>
> Yes. MIL STD 188-110 is in PCALE software (along with standard ALE)
Hi Bonnie,
Excuse me for being dense (is what I do best)...is the difference in
this discussion MIL-STD-188/110 versus MIL-STD-188/141A ?
I know the /xxx takes precidence; as do all "slash sheets".
But am missing the point (I should read the MIL specs, but have to do
that everyday at work so win
Bonnie,
Have you ever used HF-CPSHF?
John
Original Message Follows
From: "expeditionradio" <[EMAIL PROTECTED]>
Reply-To: digitalradio@yahoogroups.com
To: digitalradio@yahoogroups.com
Subject: [digitalradio] Re: RSM2400 / MIL-STD-188-110
Date: Fri, 16 Mar 2007 01:27:0
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