[time-nuts] Venus838LPx-T opinions?

Bob Stewart bob at evoria.net
Sat Jul 23 21:34:15 EDT 2016

In timing mode, you care very much about the quantization error messages.


      From: Gary E. Miller <gem at rellim.com>
 To: Mark Sims <holrum at hotmail.com> 
Cc: "time-nuts at febo.com" <time-nuts at febo.com>
 Sent: Saturday, July 23, 2016 7:52 PM
 Subject: Re: [time-nuts] Venus838LPx-T opinions?
Yo Mark!

On Sat, 23 Jul 2016 17:13:27 +0000
Mark Sims <holrum at hotmail.com> wrote:

> Yes, no Venus binary messages for sky view or sawtooth correction.
> Those are only available in NMEA.  But to make effective use of a
> timing receiver you should be running it in binary where you can
> properly monitor and control it.

The Venus is weird that way.  When it is doing Binary, it mixes in
NMEA.  So you can see both in the serial stream.

I have run the Veuus 8 in Binary and NMEA modes.  The basics
are in NMEA, the configuration and fancy stuff in their binary
sentences.  Mixing and matching is just not a problem.

In timing mode you care about the PPS and that is independent
of the serial stream anyway.

I have two Venus 8 EVBs (NS-HP) right in front of me.  They are in
base/rover mode and I'm seeing CEP(50) of centi-meter relative accuracy.
I do not have a timing version, but I can believe at least 50% of the
time it would be very stable.  Like all GPS it does go on drunken
excursions now and then.

The accuracy is so good it exceeds the math accuracy of my scatter
plot program.  Working on recoding that now.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
    gem at rellim.com  Tel:+1 541 382 8588
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