Hidden on the backplane of the Nortel (trimble) units is a SCPI interface known
as the Serial Interface to CDMA system
It is RS485 standard but I usually tap into the TTL I/O of the transceiver chip.
This is the standard SCPI interface.
E
D
C
B
A
1
+24/-48Vdc
+24/-48Vdc
+24/-48Vdc
Thanks Volker.
Vale, Hans.
Mark
VK2HMC
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Volker Esper
Sent: Monday, 23 June 2014 12:28 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Sad news
John,
Most time nuts have searched for this particular manual at one stage.
I am afraid it is unobtainium.
marks
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of gianni
Sent: Thursday, 29 May 2014 7:09 AM
To: Discussion of
That's not the original gps rx.. (281161070304)
Careful what you get off yixun..
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Pascual Arbona Lopez
Sent: Friday, 22 November 2013 7:33 PM
To: Discussion of precise time and frequency
Hi Bob, what is so wrong with the Anodised version?
--mark
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bob Stewart
Sent: Tuesday, 12 November 2013 8:25 AM
To: Discussion of precise time and frequency measurement
Subject: Re:
A popular solution down under is to use a 555 timer driving a charge pump to
generate negative rails from a single positive supply.
Example here: http://www.vk2hmc.net/blog/?p=970
Hi all - I'm back :)
--marki
-Original Message-
From: time-nuts-boun...@febo.com
As per Bob Camps Wisdom below, most of the thunderbolts and Z38XX have been
well picked over, the remaining ones are usually poor in some way.
The main problem seems to be unstable oscillators, invasive repair is required
to meet specifications.
--marki
-Original Message-
From:
Hmm, shall we vote to organise timenuts group buy?
--amrki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bill Dailey
Sent: Sunday, 13 October 2013 10:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re:
That's the first time I have seen a practical explanation and working example
of a CASC in operation.
Can I say Awesome?
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Joseph Gray
Sent: Wednesday, 2 October 2013 3:23 AM
Hey Hal,
Symetricom need sales and investment in this product, to get back the RD costs.
I believe this is the first Gen?
If they get the volume the price has to drop.
However, It is a bit sucky marketing can get away with that.
I wonder if they have good and bad CSAC a la Crystal oscillators
That it Ronald, the watchmakers art hasn't been lost, it is being bought up to
date.
Although the work that went into the circa 1880 Chronometers is nothing short
of amazing given the tools and technology of the time.
So we see history repeat!
Cheers :)
-Original Message-
From:
I really should stop doing things like this:
http://www.leapsecond.com/pages/atomic-bill/
sorry Tom ;)
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Joseph Gray
Sent: Wednesday, 2 October 2013 3:23 AM
To: Discussion of precise time
There is a problem introduced if you sink too much current off the lock pin.
An LED draws enough current to cause the issue, I think to do with not going
into lock or PPS output.
If I could just remember what the issue is...
Anyway, this guy has it nailed:
Winders?
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of David J Taylor
Sent: Saturday, 21 September 2013 2:51 AM
To: Time-nuts mailing list
Subject: [time-nuts] Space mission comes to an end becuase of a computer time
tagging problem
Mmmm femtoseconds ...
And if you manage to eat just a half you can travel in time!
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bill Hawkins
Sent: Friday, 20 September 2013 7:32 AM
To: 'Discussion of precise time and frequency
I have a couple of these boards and I have modified one to access the SCPI
command port available on the 'Z-Pack' rear connector.
The addition is simple but effective giving the TSIP front panel serial port
plus the cellular serial port.
Note that you will now have 2 separate connectors for the
2013 5:12 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access
Hi Mark
On 13/09/13 13:26, Mark C. Stephens wrote:
One obvious use for the SCPI port could be for NTPD.
The NTBW50AA is lacking 1PPS but has a very
I have discovered a possible offshoot of The Conservation of Bustedness
It's the more you clean up the less can you find
):
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Don Latham
Sent: Friday, 13 September 2013 8:21 AM
To:
and get
250 to 500!!!
Bob - AE6RV
From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070
I just received my DTS 2070 from 110 volt land.
I live
From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070
I just received my DTS 2070 from 110 volt land.
I live in 230 (well actually 250) volt land.
I haven't
between the switch mode frame and the card cage.
I have not a clue what that means..
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Monday, 9 September 2013 6:31 PM
To: Bob Stewart; Discussion of precise
om 11:52 heeft Mark C. Stephens ma...@non-stop.com.au het
volgende geschreven:
After removing endless hex screws to get at the insides I find the 24V/2A PSU
that supplies the standby voltages has what appears to be a transformer
primary short.
Problem is, one has to remove the input board
. Be sure you don't wire it backwards
and get 250 to 500!!!
Bob - AE6RV
From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070
I just received my
:15 PM, Mark C. Stephens wrote:
Amazing Ed, I just had a invasive discography last Thursday!
I have been a bit quiet because of a back injury too.
You're creeping me out Marki!
We must be living parallel lives, fortunately my telly is still
good, my
9 year old son has
and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070
Only if whatever shorts it vaporizes violently enough to kill you. When I
worked at Burroughs in the 70s, I heard stories about low volts/high amps
hijinks.
Bob
From: Mark C. Stephens ma
2013 7:24 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Wavecrest DTS 2070
On 9/9/13 2:21 PM, Mark C. Stephens wrote:
Is 200 amperes @ 2v not lethal?
Not particularly.. any more than putting your fingers across a 1.5 or 3V
battery is lethal
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and follow the instructions there.
Don't forget Hal,
Flipping the PPS has the effect of moving the pulse by the length of
the pulse so one gate in this case will move the pulse by 100MS.
That is a capital M. We are talking Mega seconds here.
So one hundred million seconds actually.
Did I get that right?
-Original
Dave, When you kick off LH Auto tune OSC parameters LH changes the elevation
mask too.
Oh yeah I was going to say, 3.63e-12 is getting awfully close to e-13, good
stuff.
Bob will tell you it's all pretty much mumbo jumbo past that point, you have
one tight GPSDO now.
And I seem to have all
I just received my DTS 2070 from 110 volt land.
I live in 230 (well actually 250) volt land.
I haven't plugged it in and I am being a total wuss about breaking the CAL
seals as they are still current.
Please help me, I really, really need to measure something with it! Anything
with it! But to
-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Friday, 6 September 2013 11:21 PM
To: time-nuts@febo.com
Subject: [time-nuts] nortel NTGS50AA embarrassing moment OCXO EFC Pin open
circuit
I got sent a duff NTGS50AA with a crook Trimble 49422C oscillator
a) Hit s then s again in LH. (survey)
b) something else caused red light (bad osc?)
Adjust unit to correct UTC and co-ords may speed up.
Where is the screen shot?
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bob Camp
Your screenshot is looking good, it is 30% through a 2000 sample survey.
I don't know why you have a red LED.
A red LED is generally hardware failure on the Trimble Nortel units AFAIK.
Hit space bar in LH to get command help.
Once you are used to LH it's a very powerful tool.
e then e again
No worries, Dave,
these Nortel/Trimble things are good bang for the dollars.
My first one is sitting in the e-13's for PPS and OSC already - it's only been
on 36 hours.
I did replace the OXCO with a MV89A as the original osc was faulty, but, then
again it only cost me $21.00 :)
That's not
I prefer to lug around my trusty old 5335A for the general bench work.
Actually, I noticed the darn (5335a's) have been breeding in the store room,
there is 7 of them there now!
I wouldn't guarantee the Cal or if they work even though!
Funnily enough, I have just kicked a 5334B out of the
I got sent a duff NTGS50AA with a crook Trimble 49422C oscillator module.
Not from Bob, he always checks his stuff, I have my vague suspicion this was
sold as untested when the seller knew it was a dud..
Anyway, we are rearranging the workshop and I couldn't get to the Weller
desolder station.
1. what or where is the gate time for the 5371A/5372A
2. how do I turn that CRT off while making very l o n g GPIB
measurements?
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which really isn't anything close to a screensaver. :-( It's
described on page 12-6.
Ed
On 9/5/2013 7:59 AM, Mark C. Stephens wrote:
1. what or where is the gate time for the 5371A/5372A
2. how do I turn that CRT off while making very l o n g GPIB
measurements
Ed,
I seems to have lost your email address.
I would love to get hold of your 5372A program you wrote?
--marki
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and follow
I have noticed that we have been searching for this document for some time now.
Has anybody been able to turn up a soft copy?
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I did an article here: http://www.vk2hmc.net/blog/?p=583
About 1/2 way down the difference between TX/RX and control RS232 signals is
explained.
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark Sims
Sent: Monday, 19
He threw a wobbly at me ):
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Dave M
Sent: Friday, 16 August 2013 7:31 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] ThunderBolt Display
Date: Thu, 15 Aug 2013 10:22:10 -0700
From:
Does anyone have the pin outs or photo of the front panel board for a Samsung
GCRU (aka CHONGHO, GCRU-D) GPSDO?
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David, Well Done, your patch has breathed life into some refclocks I thought
had reached the end of the road.
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of David Malone
Sent: Wednesday, 14 August 2013 5:44 PM
To: Magnus
David Malone is on the ball Magnus, he replied to your post with a patch for
nnmea refclock drver...
The changes to reclock_nmea will be interesting to see over next few weeks..
I do hope it is officially picked up, as there are a lot of people stranded in
1993!
--marki
-Original
Please explain what happened today then?
Also, the 2 module that I cannot set to the correct date are both Furino
GT-77's.
Over on the NTP list they are claiming it's the start of the new GPS 1024 week
epoch.
If you have a look at the rest of the days here: http://adn.agi.com/GNSSWeb/
Today was
Yep Sorry, I see what you mean, can't be the GPS week rollover bug then.
I am at a loss to explain this one then.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Sunday, 11 August 2013 6:33 PM
To: Discussion
.
Huh?!
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Sunday, 11 August 2013 7:05 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Warped back to 1993
Yep Sorry, I see what
to 1993
OK, good, found the bug. Now, iwe wish it were possible to download the
firmware, make the correction and then upload...
On Sun, Aug 11, 2013 at 1:14 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 08/11/2013 05:18 AM, Mark C. Stephens wrote:
Okay this is what worked for me:
1
Some of the GPS clocks think its 26 Dec 1993.
A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec
1993.
What happened?!
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Hal, I can't get it to take, I keep getting E-350 and the time does not change.
Did you unplug the antenna or anything while you changed date?
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Hal Murray
Sent: Sunday, 11 August 2013
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Sunday, 11 August 2013 1:06 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Warped back to 1993
Hal, I can't get it to take, I keep getting
I have 5 Z3805A and only one had the wrong date.
They all have identical GPS modules and firmware so I don't know why just one
decided to warp back to 1993.
The Z3815A is still stuck at 1993, I can't even set it to 11 Aug 2007. (-1024)
even with antenna unplugged and power cycle.
I mean, Can
] On Behalf
Of Mark C. Stephens
Sent: Sunday, 11 August 2013 2:40 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Warped back to 1993
I have 5 Z3805A and only one had the wrong date.
They all have identical GPS modules and firmware so I don't know why just one
[mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Sunday, 11 August 2013 1:19 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Warped back to 1993
Okay this is what worked for me:
1. Removed power and antenna.
2. apply power
I am trying to get a Datum 9390-55108 to work with NTPD using refclock driver 6.
So far I have been unsuccessful.
The output looks like IRIG-B (modulated 1Khz with 50% greater amplitude pulses)
I can't get it to work with NTPD.
Unless of course, my NTPD version is broken!
Does anyone have
That one is about 10 years younger than this one :)
I don't know why they called everything 9390, when the difference between
generations is substantial.
Probably a marketing decision..
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: 09 August 2013 12:16
To: time-nuts@febo.com
Subject: [time-nuts] 9390-55108 IRIG
I am trying to get a Datum 9390-55108 to work with NTPD using refclock driver 6.
So far I have been unsuccessful
%252Fimages%252Ftime-code-irig.gif%3Bhttp%253A%
252F%252Fwww.meinbergglobal.com%252Fenglish%252Finfo%252Firig.htm%3B2464%3B1
260
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: 09 August 2013 13:28
Mark:
These only ship to the UK.
Does not ship to the US
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Mark C. Stephens wrote:
Seems they are rated to 5MHz according to the manufacturer..
They ebay item number is 161081736069.
--marki
Seems they are rated to 5MHz according to the manufacturer..
They ebay item number is 161081736069.
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Eric Garner
Sent: Thursday, 8 August 2013 5:57 AM
To: Steve G8EBM; Discussion
Hi Chris,
The Mac OS X user base is also growing rapidly, with many preferring the X
desktop to Winders.
And, under the hood is BSD unix (sort of).. And there is MkLinux if you don't
like OS X..
It depends of it you want to be the kind of ham who understands radios and
can build and
Can someone put a finger on the name (type) of the antenna connector on the
Motorola GPS units in the HP Z3805, please?
:DIAG:IDEN:GPS?
COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER
# 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL
#
Can't seem to find anything in Aussie that is Called OSX connector.
Could they be called MCX connector? We got some of those ):
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of gandal...@aol.com
Sent: Tuesday, 6 August 2013
I am not really sure what you are trying to do either..
If you are trying to tee the output of a GPS, make a Y cable and connect TxD
from GPS and DCD to each end (as PPS and NMEA are broadcast or one way if you
like) once the receiver has been configured. You will have timenuts having
strokes
That is true, Windows is great for Mr. Joe average, because of the ease of use,
and because of the ease of use and user-base size, a lot of software has been
developed for it.
I use windows for a most tasks including software development and just to be
compatible to everyone else.
As you say, a
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bob Camp
Sent: Monday, 5 August 2013 8:31 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Heads up: Mark C. Stephens...
Hi
I had the same problem with some stuff I
of precise time and frequency measurement
Subject: Re: [time-nuts] Heads up: Mark C. Stephens...
Good luck delisting a DNSBL listed IP (block) from those crusaders...
Back some time there was a piss contest between some of those blacklists on
which one would blacklist the whole internet faster
Marki the smart search engine came back with:
Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html
Pulse-Per-Second (PPS) Signal Interfacing
Hardware: http://www.vk2hmc.net/blog/?p=583
If using Linux you need kernel version 2.6.39.4 or version 3 kernel as the
PPS interface is
Second the WD-40 best label adhesive remover - and is so gentle it will leave
the skin on aluminium..
Just spray it on and let it soak in.
Can also start the lawn mower / Car / Boat with it,
Fix squeaky hinges, lubricate locks..
-Original Message-
From: time-nuts-boun...@febo.com
Buggy firmware? Anyone seen the firmware floating around?
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Jim Sanford
Sent: Friday, 2 August 2013 10:46 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Trimble Nortel GPSTM Boards
I
No better ground plane than salt water...
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bob Stewart
Sent: Monday, 29 July 2013 7:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS
The Helix coils are 25' high and have a 6' high relay:
http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/8839335_kzKJLd#!i=2042047390k=QJbHKzM/
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bob Camp
Sent: Monday,
Quite right Bob, Echolink is one such program that doesn't automagically raise
DTR when the port is opened.
Anyway, I have gone Echo-IRLP now, much more robust running under unix.
But I veer of topic..
--marki
-Original Message-
From: time-nuts-boun...@febo.com
Hi,
Anyone know where I can get firmware 1.13.0 or greater for the Trimble Acutime
gold?
--marki
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interface or something else that wouldn't talk to an
RS232 device?
So, more clarification, or possibly that picture (~= 1k words) might
help. Or maybe I'm just obtuse and everyone else is getting it.
(Seems Marki may also be in the confused camp.)
On 7/25/2013 3:34 PM, Mark C
Practically speaking Cisco came to the rescue for me.
There are 2 Cisco solutions I use:
1. Cisco power brick from 1700's series routers.
2. Gutted Cisco chassis from 2600's series routers.
Both supply more than sufficient power for a thunderbolt.
I personally like option 2 as I can rack mount
I use this stuff called electronic circuit board cleaner made by RF Chemical
technology in Australia.
Dissolves the Goo like nothing I have seen (besides acetone), but is much safer
than acetone with plastics and removes flux etc.
An old toothbrush is handy for the stubborn spots.
I did a
Z3805A has the same goo problem, The Z3815A well, that does have some rubber
feet but it seems to survive well.
The Z3816A relies on the bottom surface mount tantalums as buffer but is mainly
supported by thick mounting posts.
--marki
-Original Message-
From:
I have a number of GPS L1 timing antenna up, and I suspect one of them is not
quite right.
As a test procedure, all I can come up with is a power-injector connected to
the feed line, the feed line connected to a DC block on the input of a 8566A SA.
Then connect a known good antenna and compare
RF test signal at a level that allows easy detection on
the SA. Maybe into a simple dipole antenna. A second dipole test antenna could
establish a reference that you could relate the GPS antenna gain to.
Tom
- Original Message -
From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts
Oh my gosh, a 117A has popped up on eBay!
Looks in pretty good condition given its age...
Seller claims the antenna will be listed shortly!
Item # 281141315740
--marki
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Hi Bert,
I am sure your circuit is clear in your head, but would you mind attaching
detail?
You have perked my interest with the low-noise keyword ;)
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of ewkeh...@aol.com
Sent:
Although your description,
I prefer the use of two H11 opto couplers which
work perfect. On the receiving end the diode along with a current limiter
and blocking diode for the negative level works perfect. On the output side
a power source is needed. Is a perfect circuit description, I'd
Hi Hal, according to ntp.org the parallel port is also usable for PPS:
http://www.eecis.udel.edu/~mills/ntp/html/pps.html
Also, Take a look at this gentleman's page (Chrome will translate):
http://www.finetune.co.jp/~lyuka/interests/radio/gps/
there is quite a difference between the amount of
AM, Mark C. Stephens wrote:
Oh my gosh, a 117A has popped up on eBay!
Looks in pretty good condition given its age...
Seller claims the antenna will be listed shortly!
Item # 281141315740
--marki
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California
Sorry mate, this isn't much help, I haven't heave of any of these, must be
before my time?!
Mat
Struct
Pc
Ucb
Uce
Ueb
Ic
Tj
Ft
Cc, pF
Hfe
Caps
1.
2N6429http://alltransistors.com/transistor.php?transistor=5816
Si
NPN
0.625
55
45
6
0.2
175
sure that
enough voltage is getting through to power your antenna's preamp, please?
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Sunday, 21 July 2013 2:01 AM
To: Discussion of precise time
George,
Looking at your graph, as far as I can see, the EFC jumps appear to be tied to
the TI
From the graph, your hitting +/- ~750ns. Normally, one sees +/- ~50ns. nax
(although one particular basket case I have goes up into the milliseconds
occasionally,
It is a defective GPS module, I have
George,
The Z3816A is 8 channel, the Z3801A is 6 channel.
What is the problem with the Z3816A?
EFC error?
-marki
-Original Message-
From: George Sintchak [mailto:wa2...@optonline.net]
Sent: Tuesday, 23 July 2013 12:34 PM
To: Mark C. Stephens; time-nuts@febo.com
Subject: Re: [time
I noticed the Lucent RFTG-U has mounting for a Motorola type GPS module.
Has anyone successfully mounted a GPS module in a Lucent RFTG-U and got it
working?
Different firmware?
-marki
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Warren S and I have posted details of an outer oven controller for the 10811
double oven series here: http://www.vk2hmc.net/blog/?p=526
--marki
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, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote:
I have a Z3816A and it periodically jumps into holdover with error message:
Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours
it gradually adjusts the phase alignment.
The error message is Recovery: phase
Of Mark C. Stephens
Sent: Sunday, 21 July 2013 1:21 AM
To: time-nuts@febo.com
Subject: [time-nuts] 10811 Outer oven controller schematic
Warren S and I have posted details of an outer oven controller for the 10811
double oven series here: http://www.vk2hmc.net/blog/?p=526
--marki
, interesting but putting an attenuator on the antenna input seems not a good
idea when there are 5V present...
On Sat, Jul 20, 2013 at 6:01 PM, Mark C. Stephens ma...@non-stop.com.au wrote:
Azelio, I had an interesting experience with the same symptoms tonight.
I inserted a 6 dB pad on the antenna input
in series with the dc. That will drop the voltage on the amp in
the antenna. Not a good idea.
Bob
Sent from my iPhone
On Jul 20, 2013, at 9:26 PM, Mark C. Stephens ma...@non-stop.com.au wrote:
I did a quick check of the antenna current on a normal (un-attenuated) vs.
the attenuated receiver
stations. This service gives the users 1m:ish accuracy. Phase
calibration is clearly 10cm and not needed for basic code DGPS.
--
Björn
Originalmeddelande
Från: Mark C. Stephens ma...@non-stop.com.au
Datum: 2013-07-15 12:13 (GMT+01:00)
Till: Discussion of precise time
to
restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a
command to reset only the GPS receiver but it is not in the
58503 manual.
On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote:
I have a Z3816A and it periodically jumps into holdover with error
I have been trying to find a datasheet for my Leica Antenna.
All that is marked on the antenna is part number 10147.
I want to find out what voltage range the preamp works off.
Anybody have any idea?
-marki
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Thank you, It is a AT575-90_G!
Now, On the bottom, there is an arrow labelled N.
I presume that is supposed to face north?
I can't tell you how ideal this antenna is for my application, outstanding!
Thank you again.
-marki
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