I have a Z3812A that I added back in the GPS receiver and modified it (moving
6 zero ohm resistors) to work as a standalone GPS. Basically it's now a
stand-alone Z3811. I have Lady Heather working with it now. The hack of
using the RS-422 output to directly drive a RS-232 serial port does
Behalf Of Mark Sims
Sent: Sunday, July 24, 2016 7:34 PM
To: time-nuts@febo.com
Subject: [time-nuts] Venus838LPx-T opinions?
The closest thing to an official Lady Heather site if John Mile's ke5fx.com
I also want to put it it up on Github when the code settles down some.
The good Lady He
The closest thing to an official Lady Heather site if John Mile's ke5fx.com
I also want to put it it up on Github when the code settles down some.
The good Lady Heather doesn't accept donations of the monetary kind.
Receivers not currently hoarded in her dungeon are appreciated. Particular
LOL!
Thank so much for the history of how you got trapped... errr started in
the Lady Heather software project. :)
Questions still remain:
1) What is the link to the "official" Lady Heather site?
2) How/where can we shoot a donation to say "Thanks!"?
73,
__
Clay Autery, KY
I have been running Heather on Ubuntu MATE 16-04 since Mark released it.
Wonderful.
Currently running or a R Pi 3B with lots of machine to spare!
Cheers!
Dave Mallery
On Sun, Jul 24, 2016 at 12:03 PM, Mark Sims wrote:
> I am the creator author of Lady Heather. The code in Lady Heather
> sta
I am the creator author of Lady Heather. The code in Lady Heather started out
from a program that I wrote to control Magellan GPS receivers (like the
OEM-5000) back in days of the first Gulf War... it ran under DOS as a text mode
only program.
When TAPR did their group buy for Trimble Thund
AWESOME!!! :)
Added to project list!!!
Mark, what's your official link to Lady Heather and how do we donate
to the cause?
73,
__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 7/24/2016 12:23 AM, Mark Sims wrote:
> Lady Heather now works with Venus receivers in
Yo Mark!
On Sun, 24 Jul 2016 05:23:54 +
Mark Sims wrote:
> Why somebody thought it was a good idea to not include that info in
> the binary messages boggles the mind... I hate having my mind
> boggled.
For some reasaon they never seem to ask us before designing their
protocols...
RGDS
GAR
Lady Heather now works with Venus receivers in mixed binary / NMEA mode. So
now it can display the sky view data (via NMEA sentences) while running in
Venus binary mode. I also added support for parsing the $PSTI NMEA sentence
that contains the sawtooth correction info. Why somebody thought
ot;
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 +
Mark Sims wrote:
> Yes, no Venus binary messages for sky view or sawtooth correction.
> Those are only available in NMEA. But to make effective u
Yo Mark!
On Sat, 23 Jul 2016 17:13:27 +
Mark Sims 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
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.
Whoever did the Venus binary commands did not think things th
Mark wrote:
Oh, and besides the lack of a binary message with satellite position/signal
levels, there is none that reports the sawtooth error.
How in the world can they call it a "timing receiver" if it doesn't even
support sawtooth correction?? Good grief.
Also, I see they claim 6nS acc
The NMEA STI,00 message gives a sawtooth correction. I believe what Mark was
saying was that there was no *binary* message that said so… maybe? I dunno. But
the datasheet clearly talks about PPS quantization error compensation:
STI,00 – 1 PPS timing report
An output message, id 0x0, contains i
I have implemented support for all of the relevant Venus binary messages.
It's just that I don't have a Venus timing receiver to test the timing receiver
specific messages (which are only three messages that control the self-survey
/ position hold modes). Oh, and besides the lack of a binar
Definitely the assembled "breakout board+". Maybe I'll wait til Lady
Heather has a more complete communication set with this part...
__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 7/22/2016 10:08 PM, Mark Sims wrote:
> I'd get the $80 assembled unit from Navspark f
I'd get the $80 assembled unit from Navspark first and see if it works for you.
If not, you won't have wasted your time and money on doing a PC board.
Lady Heather can now talk to Venus receivers in binary mode (also handles
generic NMEA receivers). I don't have a Venus timing receiver so
Looks like a module I might want to start with... No way I'd want to
start with the chip...
__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 7/22/2016 8:16 PM, Nick Sayer via time-nuts wrote:
> Looks like the bare modules are available for $25 (FOB Taiwan) each MQ:4.
Looks like the bare modules are available for $25 (FOB Taiwan) each MQ:4.
Eminently reasonable. I am probably going to get 4 to start with and make an
LGA breakout board for myself and do some experimenting with them.
The tough part for me is going to be upgrading the controller to the
ATMega32
Navspark will sell you one in on a board for around $80. They claim 6 ns
timing accuracy. Also 0.01 ppb on the 10 MHz output. I sent Navspark a couple
of questions about their USB interface and they never responded...
http://navspark.mybigcommerce.com/ns-t-precision-timing-gps-receiver/
---
Anybody played with one of these?
http://www.skytraq.com.tw/products/products-Timing%20Module.html
It looks promising for GPSDO designers. It has a survey mode (looks to be
automatic) and one of the NMEA messages reports quantization error.
The downsides I’ve identified so far are that it’s an
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