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Remote with Satellite

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John Perlick

Remote with Satellite

Has anyone tried remote operation with a satellite internet connection? I’m wondering if the latency is excessive.

I am looking into a remote Elecraft Station.

Thanks in advance.

John
K0UM
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Mitch Wolfson DJ0QN / K7DX-2

Re: Remote with Satellite

John,

The latency is too high, around three quarters of a second, of which
most (around 530 ms) is caused by the trip up and down to the satellite
and back. The rest is internet latency of a couple of hundred ms.

73,
Mitch DJ0QN

--
Mitch Wolfson K7DX / DJ0QN
10285 Boca Cir, Naples, FL 34109
Skype: mitchwo
USA: Home:+1-239-221-9600 - Mobile:+1-424-288-9171
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On 07.07.2018 21:05, John Perlick wrote:

Elecraft mailing list

Re: Remote with Satellite

Most of the Remote SDR sites use the satellite and the delay is excessive when trying to listen to yourself.
Mel, K6KBE

From: Mitch Wolfson DJ0QN / K7DX <[hidden email]>
To: John Perlick <[hidden email]>; "[hidden email]" <[hidden email]>
Sent: Saturday, July 7, 2018 12:13 PM
Subject: Re: [Elecraft] Remote with Satellite

John,

The latency is too high, around three quarters of a second, of which
most (around 530 ms) is caused by the trip up and down to the satellite
and back. The rest is internet latency of a couple of hundred ms.

73,
Mitch DJ0QN

--
Mitch Wolfson K7DX / DJ0QN
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 07.07.2018 21:05, John Perlick wrote:

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k6dgw

Re: Remote with Satellite

In reply to this post by John Perlick

I'm not "anyone who has tried remote with a satellite internet
connection" but I do operate a remote station. Normally, my RT ping
times to the station run around 30-50 ms and the latency is just barely
apparent if I spin the Big Knob really fast. It's really apparent if I
listen off the air on a separate rig of course but I only do that if
testing. RT light time for geosynchronous satellites is in the 250 ms
range to which you'd need to add any other I'net and terminal latency.

I'd guess that some kinds of remote ops would work OK on some modes
[CW/SSB ragchew maybe], but RTTY and digital modes and contest operation
might be a real problem. The most noticeable for an operator might be
the display delay when tuning. At any rate, I think it would be fairly
non-optimal.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/7/2018 12:05 PM, John Perlick wrote:
> Has anyone tried remote operation with a satellite internet connection? I’m wondering if the latency is excessive.
>
> I am looking into a remote Elecraft Station.
>
> Thanks in advance.
>
> John
> K0UM
>

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NK7Z

Re: Remote with Satellite

In reply to this post by John Perlick

There is about a half second of latency built into satellite no matter
how you slice it... Speed of light problem...

73s and thanks,
Dave
NK7Z
https://www.nk7z.net

On 07/07/2018 12:05 PM, John Perlick wrote:

John Langdon

Re: Remote with Satellite

There are some 'constellation' networks planned with lots of small sats in LEO that will have much lower latency, but availability dates and pricing TBD.

73 John N5CQ

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of Dave Cole (NK7Z)
Sent: Saturday, July 7, 2018 5:00 PM
To: [hidden email]
Subject: Re: [Elecraft] Remote with Satellite

There is about a half second of latency built into satellite no matter how you slice it... Speed of light problem...

73s and thanks,
Dave
NK7Z
https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nk7z.net&data=02%7C01%7C%7C603b61ef8c97483277c008d5e4551c78%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636665976547349481&sdata=nuuBghyl5nNGns8EjE5NMPr9FafR3wOMdYvpxjpb3lc%3D&reserved=0

On 07/07/2018 12:05 PM, John Perlick wrote:

> Has anyone tried remote operation with a satellite internet connection? I’m wondering if the latency is excessive.
>
> I am looking into a remote Elecraft Station.
>
> Thanks in advance.
>
> John
> K0UM
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Jim - N4ST

Re: Remote with Satellite

In reply to this post by NK7Z

Yep, I run around 600ms on Viasat satellite Internet.

_____________
73,
Jim - N4ST

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of Dave Cole (NK7Z)
Sent: Saturday, July 7, 2018 18:00
To: [hidden email]
Subject: Re: [Elecraft] Remote with Satellite

There is about a half second of latency built into satellite no matter how you slice it... Speed of light problem...

73s and thanks,
Dave
NK7Z
https://www.nk7z.net

On 07/07/2018 12:05 PM, John Perlick wrote:
> Has anyone tried remote operation with a satellite internet connection? I’m wondering if the latency is excessive.
>
> I am looking into a remote Elecraft Station.
>
> Thanks in advance.
>
> John
> K0UM

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k6dgw

Re: Remote with Satellite

There are basically 3 components to the latency ...

The RT light-time [approx 24,000 miles] is about 250 ms and is
constant. There is a latency within the transponder, which used to run
around 200 ms, I don't know what the newer ones might be, if there are
any. That too is probably fairly constant. There is also some latency
in the ground terminal equipment, plus the normal latency between it,
you, and the remote. That varies over time. All told, I wouldn't be
surprised to see RT latency in the 700 -800 ms range.

With RT ping times in the 35-55 ms range plus whatever delays are
introduced by two RemoteRig RRC's, I don't notice it. 99% of the time,
the I'net connection is solid. Very occasionally, dropouts will
essentially make the remote unusable.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/7/2018 3:51 PM, Jim - N4ST wrote:
> Yep, I run around 600ms on Viasat satellite Internet.
>
> _____________
> 73,
> Jim - N4ST
>

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Phil Kane-2

Re: Remote with Satellite

On 7/7/2018 5:02 PM, Fred Jensen wrote:

> The RT light-time [approx 24,000 miles] is about 250 ms and is
> constant. There is a latency within the transponder, which used to run
> around 200 ms, I don't know what the newer ones might be, if there are
> any. That too is probably fairly constant. There is also some latency
> in the ground terminal equipment, plus the normal latency between it,
> you, and the remote. That varies over time. All told, I wouldn't be
> surprised to see RT latency in the 700 -800 ms range.

That sure beats the original geosynchronous latency of over 2 seconds,
really testing the mettle of AT&T's echo suppressors.

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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