[Elecraft] K3 remote over satellite internet?

[Bill OMara]

Thanks Mitch
 I think we can close this thread as I can’t find any light at
the end of the rainbow.

 

73 Bill  W4RM

 

From: Mitch Wolfson, DJØQN / K7DX [mailto:dj0qn at gmx.net] 
Sent: Thursday, December 22, 2016 6:26 PM
To: Bill OMara <W4RM at AOL.COM>; elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 remote over satellite internet?

 

Bill,

There are no good news stories on using RemoteRig over satellite. A couple
of people have been on the RemoteRig Forum where things like this are
discussed at http://www.remoterig.com/forum/index.php and had tried in vain
to get it to work.

As Joe wrote, the latency is too high to make it work. To put it more in
numbers, the speed of light is (only) 300,000 km/s and the geosynchronous
satellites are in orbit at 40,000 km. Therefore, for the double round trip
that is necessary for the packets, you have a trip of 160,000 km. This gives
you a latency of 533 ms. Then you need to add on the normal ground latency
that comes on top of this in the 200 ms range, giving you a delay of about
three-quarters of one second! Things get difficult for SSB once you hit
about 200 ms, so this just will not work due to physics.

73,
Mitch DJ0QN / K7DX




Mitch Wolfson DJØQN / K7DX
10285 Boca Cir, Naples, FL 34109
Skype: mitchwo
USA: Home:+1-239-221-9600 - Mobile:+1-424-288-9171
Germany: Home:+49 89 32152700 - Mobile:+49 172 8374436

On 22.12.2016 17:56, Bill OMara via Elecraft wrote:

Jim and others,
 
I agree with everything that everyone has said..... That's why I was asking
about a good news story?  Has anyone tried it? 
Any real first hand reports?
 
The specs don't always tell the truth, but most of the time they do!
 
73 Bill  W4RM
 
-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim
Brown
Sent: Thursday, December 22, 2016 5:43 PM
To: elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net> 
Subject: Re: [Elecraft] K3 remote over satellite internet?
 
On Thu,12/22/2016 1:37 PM, Bill OMara via Elecraft wrote:

Does anyone have any good new story's in running a k3 remoterig set-up 
over a satellite internet system? Hughes Net, Exede or others

 
There are at least two issues. The most obvious is latency -- how much "turn
around" time are you able to tolerate? You've got to make the round trip up
and back to the bird, and that's in addition to digital encoding latency.
The second issue is bandwidth. I've heard that satellite systems aren't
exactly speedy. :)
 
73, Jim K9YC
 
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