There are two types of Oscilloquartz GPSDOs appearing on Ebay:
For now, I would avoid the OSA-4530. I have been unable to talk to it. The
version being sold now may have non-standard firmware. All commands return
an "unknown command" error.
The Oscilloquartz GPSDOs that use the Star-4
Hi Perrier,
I have one of these (or it appears to be identical): GPSDO Symmetricom Inside
GPS10MHz 1PPS GPS Disciplined Clock & GPS Ant Display Refurbished $209.99
LH works connects and appears to work fine with it.
Caveats:
no idea if the “insides” of all of those
Hi,
I received an unexpected lost money just at Christmas time.
I had my eye on a GPSDO Symmetricom Inside GPS10MHz 1PPS GPS Disciplined Clock
& GPS Ant Display Refurbished $209.99 radioshackus.
It has a LCD display the shows some sat data.
At his time I'm not planning on running Lady Heather
I've been using Trimble VTS to sync a local server clock to my Thunderbolt.
I use the Meinberg NTP server as the time source for the other computers I
have. I like the Lady Heather program and what it has to offer, but it does
not seem to sync the time to the server clock the way the Timekeeper in
What's the option on Lady Heather to do the GPS reception survey? I'm
looking for the one that plots the signal strength vs azimuth and elevation
to give a picture of satellite visibility over time. The only one I can
seem to find is the one that tracks the current satellites over the horizon.
I think the graph is not using peak detect for the plotting. I leave
mine set at a 12-hour window and all the points are moving around every
second. When plotting more data than will fit in the available
resolution, it is best to bin the points that correspond to each plot
bin/pixel. Then
When you are viewing a time interval that is longer than one second per screen
pixel, the program must sub-sample the data. Every second the screen is
redrawn with a new set of samples. Also the plots are rescaled according to
the data being plotted (if auto-scaling is turned on). With
Warren,
Thanks for the info. I thought I'd been through all the menus, but I
missed the display filter. Very useful. Right now, some of the other
things you showed are lost due to temperature fluctuations in my
workshop. I have to get my Tbolt set up with the temperature control
system
I suspected that the graph issues might be involved with some display
resolution issues. So then if a spike appears and disappears at some
point in time, does that mean that in the original data there was a
combination of spike and no-spike data and the sub-sampling first picks
one and then
Assuming the vertical scale doesn't change, there should be no change to a
particular trace as it scrolls across the screen, even if there is more than
one sample per pixel. That's where a peak detect plotting algorithm helps out.
Imagine an ink pen plot of some signals then stand back about 10
If your plot area is 1200 pixels wide and you are displaying 1 hour of data
(3600 seconds) then the data from every third second is shown on the screen.
The plot area is updated every second. If your spike event is one second wide
it would appear on the screen once every three seconds.
The
Thanks Mark!
Now I understand. I see that you can reduce the jitter in the graph by
changing the screen resolution using the $ command (e.g. changing from
medium to large) so that you have more pixels on the screen. You can
now reduce the filtering to help preserve short duration spikes and
You can also stop a lot of the jumping around of plots by disabling the
auto-scaling of that plot (or all of them). You can also disable the
auto-centering. The default is to rescale and re-center the plots each time
the screen is updated. A short spike can cause the screen to rescale as
I've been running the Windows version of Lady Heather tp make some
comparisons between Thunderbolts and Mini-Ts, she cracks her whip just as
firmly
for the Mini-T:-) and have noticed that, for both, I'm seeing all the plots
other than the frequency deviation.
If I move the mouse pointer
I'm seeing all the plots other than the frequency deviation.
Osc plot defaults to off,
g o turns in on
Push spare bar for the help screen
ws
*
I've been running the Windows version of Lady Heather tp make some
comparisons between Thunderbolts and Mini-Ts, she cracks her whip
In a message dated 10/10/2009 20:17:36 GMT Daylight Time,
warrensjmail-...@yahoo.com writes:
I'm seeing all the plots other than the frequency deviation.
Osc plot defaults to off,
g o turns in on
Push spare bar for the help screen
---
Ah, thank you, didn't know that.
... ...
LH is a great and flexible program that can be customized in many ways
ws
**
Subject: Re: [time-nuts] Lady Heather question
warren writes:
I'm seeing all the plots other than the frequency deviation.
Osc plot defaults to off,
g o turns it on
Push space bar
John/Mark,
I don't own a Thunderbolt, but I do have a very nice Trimble NTGS50AA
GPSDO which works very well, and it also operates very nicely with
TBOLTMON, in both TSIP and SCPI modes.
However, I've just fired up Lady Heather V2.0 for the first time, and
although the program starts, nothing
8:45 pm
Subject: [time-nuts] Lady Heather question
John/Mark,
I don't own a Thunderbolt, but I do have a very nice Trimble NTGS50AA
GPSDO which works very well, and it also operates very nicely with
TBOLTMON, in both TSIP and SCPI modes.
However, I've just fired up Lady Heather V2.0
...@aol.com
Sent: Thursday, June 18, 2009 1:13 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lady Heather question
HI Murray,
got the same problem and found that the program looks as default
COM1 port...
Please chk and change port.
Rgds Ernie.
-Original Message-
From
oh yes please!!!
dave
On Sat, Feb 21, 2009 at 9:21 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
David C. Partridge skrev:
Yes, Windows always seems to think a Thunderbolt is an MS mouse. Look
back
in the archives about using /Fastdetect in boot.ini (BTW this doesn't
work
David C. Partridge skrev:
Yes, Windows always seems to think a Thunderbolt is an MS mouse. Look back
in the archives about using /Fastdetect in boot.ini (BTW this doesn't work
with WinXP 64 - so I had to disable the serial mouse in the devices).
The cure for that is very old - don't have the
On 2/21/09, Magnus Danielson mag...@rubidium.dyndns.org wrote:
I'm considering a Linux port since I want to reduce my dependency on
Windows at all times.
before knowing about the existence of lady heather I had started
coding a very simple Linux/Unix program that would work much like
On Sat, 2009-02-21 at 11:42 -0500, Chuck Harris wrote:
Magnus Danielson wrote:
I'm considering a Linux port since I want to reduce my dependency on
Windows at all times.
If you do, welcome! Please take a trip to:
http://counter.li.org/
You might also be interested in my account of
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of John Miles
Sent: Thursday, February 19, 2009 11:57 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather question serial error
Hmm. No, I
[mailto:time-nuts-boun...@febo.com] On
Behalf Of ESeacord
Sent: 21 February 2009 03:21
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather question serial error
John
Thanks much for getting my head on straight.
I bought(ugh) a standard rs232 9 pin cable and part
Hi all
After finally getting the right serial cable, only uses tx-rx and ground.
Everytime I start Lady Heather, I get the error message serial receive
error, code 0x2
The only other process running is outlook.
The tbolt monitor program dspmon and tboltmon both appear to work properly.
My system
...@febo.com]on
Behalf Of ESeacord
Sent: Thursday, February 19, 2009 8:49 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather question serial error
Hi all
After finally getting the right serial cable, only uses tx-rx and ground.
Everytime I start
Having failed to get the program working properly on an old 486 Laptop,
I installed it on a more modern machine running XP. When I try to open
the program I get an error message about Com Port Not Available ??
How does one select the COM Port ?
Thanks, Dick, W1KSZ
Richard W. Solomon skrev:
Having failed to get the program working properly on an old 486 Laptop,
I installed it on a more modern machine running XP. When I try to open
the program I get an error message about Com Port Not Available ??
How does one select the COM Port ?
/2 should get it to
. Solomon; Discussion of precise time and frequency
measurement
Subject: Re: [time-nuts] Lady Heather Question
Richard W. Solomon skrev:
Having failed to get the program working properly on an old 486 Laptop,
I installed it on a more modern machine running XP. When I try to open
the program
John Miles skrev:
The DOS version had a bug that caused it to ignore the /2 altogether (it
hardwired the COM port back to 1 after parsing the command-line arts).
That's fixed in the Windows build.
Do you use Windows serial line routines or maintain Marks more direct
access? For a Windows port
01, 2009 4:18 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather Question
John Miles skrev:
The DOS version had a bug that caused it to ignore the /2 altogether (it
hardwired the COM port back to 1 after parsing the command-line args).
That's
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