of precise time and frequency measurement
Subject: Re: [time-nuts] NTP Clock suggestions?
Hi
That's pretty much what I expected. The $99 is not a real price.
Bob
On May 28, 2013, at 6:10 AM, Mark C. Stephens ma...@non-stop.com.au wrote:
I was sucked in and got this reply:
_ _ _ _ _ _ _
Dear
Watch Out, I got hold of one..
I have powered it up and its drawing 52W @ 24v.
My question is, What is the input voltage range on the Z3815A?
Also, one for those familiar with the Z3815A,
Holdover Uncertainty Predict: is showing 2 dashes ( -- )
From my experience with the Z380x clocks this
[mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Tuesday, May 28, 2013 11:58 AM
To: time-nuts@febo.com
Subject: [time-nuts] Z3815A
Watch Out, I got hold of one..
I have powered it up and its drawing 52W @ 24v.
My question is, What is the input voltage range on the Z3815A
Ed and Bob,
The FRK has settled down to 0.03Hz out after 2 days undisturbed (back in its
black box).
Allan deviation @ 800 seconds is 4.88E-12 which I am not terribly happy about.
-mark
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I believe these were all rescued from the Tip (Dump, Trash) judging by the
water damage and bent cases.
Mine had been tested in Japan and had approximate co-ordinates in it:
https://www.google.com/search?q=34+44'+N+135+21'+Eoq=34+44'+N+135+21'+E
Initially I had a OCXO communication error which
Of Ed Palmer
Sent: Monday, 27 May 2013 1:33 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 9390 GPS RX
On 5/26/2013 8:24 PM, Mark C. Stephens wrote:
Ed, I'd unplugged the Rb from the counter and into the timer for measurement.
During this time it had dropped
On 5/25/2013 8:26 PM, Mark C. Stephens wrote:
Hmm, Well looks like everything's checked out except, when I chucked it on
time-lab the Allan deviation has gone out the window!
Its measuring 6.17E-10 over 1 hour reading.
Before I 'fixed' it was 4.99E-12 and I thought that was pretty average
Wow I thought my offset/jitter specs were good!
Yours are outstanding.
I am using a HP thinclient (T150) with a 60Gb laptop drive shoehorned into it,
just 10W to power it ;)
remote refid st t when poll reach delay offset jitter
Bill, they are keepers,
The internal tracking generator makes them very useful for tuning/designing
filters..
Also, Shh don't tell anyone, some of the boards are the same as the legendary
3325A.
Quite often I have board I need in a scrapped 3335A's when repairing 3325A's.
Quick fix mate ;)
-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
On Behalf Of Mark C. Stephens
Sent: 22 May 2013 07:56
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
Just a Follow up,
I checked the 10 Mhz output of the 9390 and it was... ~12 MHz.
Uhuh, Wiggling some cables I came across
attached to this 9390 :p
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Thursday, 23 May 2013 1:16 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/22/2013 4:58 AM, Mark C. Stephens wrote:
It's
without some of the abundant collective wisdom and
experience contained in the time-nuts members!
-marki
-Original Message-
From: Mark C. Stephens
Sent: Friday, 24 May 2013 2:01 AM
To: Discussion of precise time and frequency measurement
Subject: RE: [time-nuts] 9390 GPS RX
Ed,
Okay
it
then.
Does it sound/look like the crystal has gone out of adjustable range?
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Friday, 24 May 2013 12:22 AM
To: Discussion of precise time and frequency
to be checked, but that's enough for now.
Ed
On 5/23/2013 10:38 AM, Mark C. Stephens wrote:
Okay, I pulled the black box cover off and was greeted by a picture of how
things should be made. After some considerable time staring at the veritable
work of art, I thought I saw the crystal hiding
and I! :)
I want to do some checks for spectral purity and drift before I install the
9390's Ball back in.
Good stuff mate :)
-marki
-Original Message-
From: Mark C. Stephens
Sent: Friday, 24 May 2013 10:37 AM
To: time-nuts@febo.com
Subject: RE: [time-nuts] 9390 GPS RX
Ed,
I nailed
day is wrong, I think we are ~142 but its saying
278, Is that a GPS receiver bug?
So, Any helpful navigation hints before I embark on this Journey?
Many thanks,
Marki
From: Mark C. Stephens
Sent: Tuesday, 21 May 2013 8:42 PM
To: 'time-nuts@febo.com'
Subject: 9390 GPS RX
Hello Fellow time nuts
Same here, My email was sent at 8:42pm and it finally arrived on the list at
9:51pm.
Something is awry!
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of J. Forster
Sent: Wednesday, 22 May 2013 6:42 AM
To: David McGaw; Discussion of
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: 22 May 2013 07:56
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
Just a Follow up,
I checked the 10 Mhz output of the 9390 and it was... ~12 MHz.
Uhuh
Hello Fellow time nuts,
I received a Datum 9390 GPS receiver I bought off eBay today. It had a PSU
fault and I am running it off a bench supply until I can get the PSU working
again. All the PSU does is supplies 28V so I can probably adopt a more recent
supply to fit if I can't fix the old
To: 'Discussion of precise time and frequency measurement'; li...@lazygranch.com
Subject: Re: [time-nuts] Measuring Phase diference between different GPSDO
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
On Behalf Of Mark C. Stephens
Sent: Thursday, May 02
in this application.
Bob
On May 3, 2013, at 12:28 AM, Mark C. Stephens ma...@non-stop.com.au wrote:
According to http://www.realhamradio.com/z3801a-turning-point.htm they use a
HP 3575A phase meter to perform the measurement.
Or perhaps I have misinterpreted the whole thing?
I do have
the software should show you frequency, and frequency stability.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Friday, May 03, 2013 10:07 AM
To: Discussion of precise time and frequency measurement
Subject: Re
, you can indeed have something broken somewhere. In
that case, repair is a good idea. Unless you blew the thermistor in the OCXO,
it's an unlikely repair though.
Bob
On May 3, 2013, at 12:48 PM, Mark C. Stephens ma...@non-stop.com.au wrote:
Am on the way to doing my first 'phase
I'd like to perform some comparison between a known good GPSDO and some
newcomers.
I want to adjust the crystal turning point as my new GPSDO tend to wander all
over the place.
I see some of you are using the hp 3575A to do this.
Unfortunately, they are a little out of my price range at the
, then the PicTic counter board is a reasonable
alternative. It will also let you measure between PPS's very accurately.
Both approaches are far more accurate than you will need for checking
conventional OCXO based GPSDO's
Bob
On May 2, 2013, at 9:33 PM, Mark C. Stephens ma...@non-stop.com.au wrote
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Friday, 3 May 2013 1:09 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Measuring Phase diference between different GPSDO
It is as you said Bob, I
According to http://www.realhamradio.com/z3801a-turning-point.htm they use a HP
3575A phase meter to perform the measurement.
Or perhaps I have misinterpreted the whole thing?
I do have a temperature controlled workshop that is always 24 degrees so
hopefully thermal drift won't be too much of
Hi All, I am trying to get my head around building a nanobsd for some HP
thinclients to run as stratum 1 servers.
If you have the time, please send me an example conf file for sh nanobsd.sh -c
myconf.nano
I am unsure of how to add my 2 refclocks, a 29 (trimble) and a 20 (nmea+pps)
Also, where
Thanks Ulrich, Much Appreciated, prefer to use your software.
Thanks Again,
mark
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ulrich Bangert
Sent: Tuesday, 23 April 2013 5:36 PM
To: Time nuts
Subject: [time-nuts] Z38XX
Gentlemen,
...@febo.com] On Behalf
Of Ed Palmer
Sent: Sunday, 21 April 2013 9:51 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Z38XX
Hi Mark,
I looked in the manual, but I can't see where it says that the command is
written to NVRAM. Where did you find that?
Ed
On 4/20/2013 11:53 AM, Mark C
I have noticed Z38XX constantly sends:
:PTIME:TCODE FORM F2
Reading the documentation, this is a NVRAM command - it is supposedly written
to NVRAM each time it is issued.
Wouldn't this eventually wear the NVRAM out if Z38XX left running for long
enough?
Or perhaps it only writes when the
in the manual, but I can't see where it says that the command is
written to NVRAM. Where did you find that?
Ed
On 4/20/2013 11:53 AM, Mark C. Stephens wrote:
I have noticed Z38XX constantly sends:
:PTIME:TCODE FORM F2
Reading the documentation, this is a NVRAM command - it is supposedly
Thanks Guys, you have instilled a great deal of confidence in these
smartclocks for me.
Anyone know where I can buy a month's supply of patience then? ;)
On a more serious note, I have rack mounted both clocks with UPS power and they
shall not be disturbed.
http://www.vk2hmc.net/blog/?p=86
I have dumped the 4 flash ROMS from my latest Z3805A but I can't make head nor
tail of the contents. I am thinking the flash are interleaved.
http://www.vk2hmc.net/blog/wp-content/uploads/2013/04/z3805-flash.rar
I can't see any strings that make sense like the Z3801A flash.
2013 12:43 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Z3805A flash dump.
On Wed, Apr 17, 2013 at 08:31:49AM +, Mark C. Stephens wrote:
I have dumped the 4 flash ROMS from my latest Z3805A but I can't make
head nor tail of the contents.
I am
that, then combining low/high bytes will give you what you want.
See http://leapsecond.com/museum/z3801a/eeprom.htm for an example of the result.
/tvb
- Original Message -
From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com
Sent: Wednesday, April 17, 2013 1:31 AM
Subject: [time-nuts
: Thursday, 18 April 2013 4:32 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Z3805A high value PU
On Wed, 17 Apr 2013 08:26:08 +, Mark C. Stephens wrote:
On a more serious note, I have rack mounted both clocks with UPS power
and they shall not be disturbed.
http://www.vk2hmc.net/blog
Dear Fellows,
I recently purchased a pair of Z3805A off eBay seller tommy_chou.
I have fired them up with a MaxRad 26db timing antenna attached to each.
The antennae have a clear view of most of the sky.
The receivers are having no problems seeing enough satellites.
The problem I am seeing on
Actually, before I plugged the GPS antenna into the second unit, I checked out
where it last called home:
LAT N 36:01:05.225
LON E 128:41:48.761
HGT+1214.14 m (MSL)
So it was pretty high up somewhere in south Korea.
Regarding the second unit:
After I collected this information, I
I searched far and wide and eventually found the pin-outs for the Furuno GT-77
GPS timing module.
I believe the 16 Satellite, GT-80 timing GPS modules are the same pin-out.
Pin1 is the closest pin to the antenna socket.
1. TXD
2. RXD
3. Ground
4. +5v
5. not specified.
6. 1PPS
7. Battery Backup
Thank you Chuck, That certainly hit the spot.
I can certainly verify the Z3805A is unresponsive to commands on Port 2.
May I ask where the port2 Broadcast (Continuous Output) Mode is documented?
mark
I wanted to have a look at what the Z3805A puts out on Port 2.
I can see the LEDS flickering on the BOB so its saying something.
I connected up a terminal program set to 96008N1 and it seems there is nothing.
So I plugged the cable into port one to check the settings:
scpi syst:comm:ser2:pace?
Hello Folks,
I have the chance to get hold of a 3575A, a HP Gain-Phase meter, would it be
any use for me as a time nutcase?
Many thanks,
Mark
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Hello group,
I hope the new year finds you all well?
I have just received an Austron 2010B Disciplined frequency standard.
Could some kind soul help me out with an operations manual?
Many thanks,
Mark
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time-nuts mailing
program! Good to see you are
well, Chuck.
Many thanks,
Mark
From: Chuck Forsberg WA7KGX N2469R [mailto:c...@omen.com]
Sent: Saturday, 24 December 2011 5:03 PM
To: Mark C. Stephens; time-nuts
Subject: Re: phase lock
I have a Racal-Dana 1992 Nanosecond Universal Counter that includes
a phase
Just curious, If I place a pair of high gain active antenna next to each
other, will they interfere with each other? If so what is the minimum distance
apart?
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Realterm is a good one too:
http://realterm.sourceforge.net/
Cutecom works perfectly:
http://cutecom.sourceforge.net/
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Hey Thanks for the reply, I have 2 uses for the GPSDO, ref clock for NTP server
or 10mhz ref clocks for the labs.
If I find one is not suitable for one task, I can try it on another.
I have built a few GPSDO and regularly change oscillators, so I have a good
idea about the circuitry and
Hi All, Risking opening a potential can of worms, has anyone have a specs
roundup of GPSDO?
Ideally, Maximums of Phase noise, Jitter, accuracy...
Many thanks,
Mark
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Hello All,
We aren't all made of money so here is the slow but free approach:
Download Visual C# or VB, etc express version from Microsoft for free.
http://www.microsoft.com/exPress/
Download visa + driver CD from NI for free.
Dear All,
To clarify, I was not comparing a quick app to read/set a HP 59309A digital
clock with some of the awesome applications produced by the members of this
group.
Additionally, I would not recommend Visual basic for a large application either!
My idea is to encourage everyone to roll
Hello Jerome,
I use Labview with a NI GPIB card.
There are already data logging modules using the HP5328B for labview.
The code is easily modified and using labview you can debug by single step etc.
Even if you have access to an old ISA bus GPIB card only, you can set up a GPIB
network
Hi All,
I am lurking in south west Sydney.
I run a hobbyist lab and I have a great collection of HP equipment.
For my in house standard, I have got a poor man's Z3815A (GCRU) on a UPS.
I have a number of GPSDO projects going in various stages and I read this list
daily.
Please feel free to
Dear All,
When I bought my 5370B it was advertised as faulty; would not start, garbage
on the display.
After Reseating the EPROMS, the 5370b worked again.
However, The sockets will probably need replacing sooner or later.
If you get the chance to snap up one of these great
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