Season Greetings to all,
I have a Jackson Labs Fury with off-board connectors for the oscillator
which I would like to change it to be self-contained with an on-board OCXO.
Does anyone have an MTI Series 270, 241 or 230 that they would like to sell.
Comments welcome on any other well behaved os
So some more specific detail in how I am running LH with multiple TBs. I am
actually running three instances of LH all with unique command line input for
each TB and each with a different COM port specified. The three TBs are running
from the same antenna using a Symmetricom 5853A 4-way splitter
I'm using the latest version of LH connected to two Thunderbolts. Whenever I
do a precision 48-hour antenna survey, I'm confused on if the derived best
coordinates are automatically loaded into the Lat & Lon registers when it
completes. What is the procedure at the completion of the precision surve
close that can assist you.
Regards,
Tom
- Original Message -
From: "Don@True-Cal"
To: "'Time Nuts Group'"
Sent: Monday, August 29, 2016 5:17 PM
Subject: [time-nuts] SR620 Problem
> Hello All,
>
>
>
> Sorry if this is a repeat but not showing u
Hello All,
Sorry if this is a repeat but not showing up in my sent mail. Changed the
list address slightly.
I'm looking for someone that has repair experience on the SR620 TIC. I have
a failed unit that has previously worked perfectly for many years while
running continuously on my lab benc
Hello All,
I'm looking for someone that has repair experience on the SR620 TIC. I have
a failed unit that has previously worked perfectly for many years while
running continuously on my lab bench. The failure occurred after a very
dirty mains power failure during a storm. There was no other evi
Guys,
The SR620 X/Y feature is extremely valuable for my time lab. You probably need
to rethink the feature after setting up a nice X/Y display and experimenting
with the different display features. I use an Rb and distribution amp for my
lab 10MHz standard which feeds the external ref input of
It always helps to know a little about the specific design of the temp control
circuit but let's say counter clockwise CCW reduces the internal oven temp.
This can be confirmed by letting the temp and frequency stabilize. Using a
counter with good resolution monitoring the output frequency, turn
Yes, it has full support in the latest NI 488.2 v3.1.1 drivers and tools
package. From there you can run many application level programs that support
the NI 488.2 API, including the VISA interface. I use Agilent VEE primarily
and I always like to use EZGPIB (thanks Ulrich, great program) for quick
Hello All,
I recently added a second NI GPIB-ENET/100 to my instrumentation lab. This
addition was a better approach than extending a single GPIB bus into two
separate lab areas separated by ~30-feet. This new setup is working well but
however gives me two GPIB bus "segments" named GPIB0::xx and G
http://stockage.elfangelis.fr/cash.php?kxnc%9x%77%1h%08xpidio%4e=943
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I've tried both the MV89a and the Oscilloquartz 8663 (I think UCT is the same
or very close) with the Thunderbolt. The Oscilloquartz does not fit any of the
OCXO thru-hole combinations but the MV89a does fit one of the OCXO variations
that TB accommodates. That makes for a very clean/compact rep
LH & TB experts,
I have three Thunderbolts bought over several years. My older unit Mfg:
29-Sept-2000 has f/w 2.12 and besides working flawlessly providing 10Mhz and
PPS references, one annoying issue is that this unit has three LH (ver. 3.00
beta) display fields that are obviously not displayi
Jerome,
All of the modern temperature calibration dry-wells that support both
lower-than-ambient and higher-than-ambient set points, within the same well
cavity, do so by changing the current direction through (typically) several
Peltier junctions attached to a massive aluminum block. See Hart
Said,
I would like to take advantage of the Fury TempCo capabilities when using an
Rb. I have been looking for the thru-hole pad which you say is next to C67 but
I can't find a C67. Consider that I am over 60 and eyesight is challenged but I
have found C68 with nearby pads. Can you give us some
My experience is very similar to Scott's. I ran many hours with both an
LPRO-101
and FE-5680A. The disciplining behavior and Fury settings were the same for
either Rb. My biggest disappointment was the recovery time due to various
common
or intentional bumps or especially, after power loss. I
Jeff,
Here are the current part numbers and price for the major assemblies of the
3458A. The A1 board is the most complex and expensive and requires complete
calibration after replacement or service. As you can see, the A1 module cost is
>$2000. Better plan! Agilent will repair (fixed rate) whi
Thanks everyone for some good information. Here is what I know for sure from
testing, observation and more searching.
1) The devices in any of my TM mainframes are NOT Darlingtons.
2) The actual Q12 device in my TM501 is stamped SJE924 (Tek PN 151-0349-00)
These two facts seem contradictory with
Tektronix TM500 Series Help
Isn't the pinout of the MJE3055 (BCE) different from the SJE924 (ECB).
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Don @ True-Cal
Sent: 02 January 2010 20:33
To: time-nuts@feb
Happy New Year to all!
In working on my TM501 which serves as the power supply for my AM503B current
probe, I had to dismount the 2 series pass transistors from the TM case (heat
sink). After repair (filter caps) and during remounting the circuit board, Q12
transistor TO-127 case fractured whil
John,
Thought I would ride alond on this email thread and ask about my TAPR
TADD-1, Enclosure and TB order from back in June. At that time, shipping was
targeted for Sept.
Order under Don Johnson, True-Cal
Regards...
Don
From: John Ackermann
To
Uh-Oh, yes I mixed up John's "Tool Kit" name with Ulrich's software. Sorry to
both. I now see a clear disadvantage to my installing both into the same
program files directory.
Regards...
Don
- Original Message -
From: John Miles
To: Discussion of precise time and frequency meas
Joe,
I have the 8560E analyzer with the 85671A utility. I find the utility to be
fairly slow in taking the numerous measurements and processing the results. The
PN program from KE5FX EZGPIB does this in about 1/4 the time and has more post
processing display options. You do need a computer with
Noticed I misquoted the ERRSTR. It is:
114 System Error – multislope rundown convergence
Regards...
Don
From: "Don @ True-Cal"
To: Discussion of precise time and frequency measurement
Sent: Tuesday, August 4, 2009 9:29:15 AM
Subject: [time-nut
Hello,
Seems this is the month for errant 3458A DMMs. I have a unit that was working
fine and passing both the power on and full Self Tests. The unit has been
stored away for a few years and is very clean. After several days of continuous
error free operation, is started kicking out the error:
I am looking at this unit with interest also. Is this model intended for 10MHz
reference and 10MHz distribution.
Can you reply with the spec sheet as an attachment please.
Regards...
Don
From: Majdi S. Abbas
To: Discussion of precise time and frequency meas
Tom,
The most direct and quickest way I observe this is from GPScon (also use LH). I
also constantly monitor one or the other GPSDO setups with an SR620 (zero
crossing technique) with an LPRO-101 as the reference. I use an Tektronix
monitor display on the SR620 so I can watch deviation from re
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
> Behalf Of Don @ True-Cal
> Sent: Monday, July 13, 2009 1:15 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Trimble Thunderbolt setu
Arnold,
I have the same question as well as observations as yours. I have been
working with both the TBolt and Fury connected to two different 10811s. With
either the TBolt or Fury, I can't get the TC large enough to only provide a
nudge to the EFC every few minutes. Both receivers get real uns
Hi All,
As mentioned in these earlier threads, the Stanford site does not include
schematics in their online manuals. I have the online version of the manual for
my SR620 but would love to have the schematics. I am getting ready to install
the low phase noise SC10 as the high stability referenc
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http://www.prc68.com/Alpha.shtml All my web pages listed based on html name
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam
Don @ True-Cal wrote:
> Fellow Time-Nuts,
&
Fellow Time-Nuts,
I am having great fun with Ulrich's EZGPIB and Plotter programs to automate my
ADEV and TI measurements. Wow, what a nice set of programs, thanks Ulrich!
I use the SR620 TIC with a Fury board as an external reference. The Fury
disciplines an 10811-60168 external oscillator. I
Test Message
Parden the clutter but having problems posting
Don
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do you get inside an LPRO-101? Does
the case just spring off?
Thanks,
Ian.
- Original Message -----
From: "Don @ True-Cal" <[EMAIL PROTECTED]>
To:
Sent: Monday, October 20, 2008 7:05 PM
Subject: [time-nuts] Question and help with LPRO-101
Hello,
Can anyone guide me or
Hello,
Can anyone guide me or give me a link to internal settings on the Efratom
LPRO-101 Rb oscillator. I have the User's and Integration Guide but I am
looking for more detailed information on any optional settings that may be
available from the many inside jumpers and/or hidden connectors.
Ulrich,
I have been wanting to try your EZGPIB to control and capture data from various
instruments I run in my lab. My GPIB bus typically has 3-6 instruments
connected and I currently use the NI GPIB-ENET/100 as a LAN bridge to any one
of several windows based computers. Ocassionally, I also u
Hello group,
This request is primarily directed to Said concerning the Fury OEM board that
several of us bought a few months back. I have been working with the board and
trying several different OCXOs. Is there a table or graph that would help
determine the SERVO:DATG index if the Hz/volt slop
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
Hello Folks,
I am looking for a manual, or at least a schematic for the Ball Efratom PTB-100
Rubidium Time Base (Tek TM-500 plug-in). The Rb oscillator is working fine but
there is a problem in the control and TTL conversion circui
Since this got the attention of tbolt users, I have a question...
How do I enable the Time Interval Counter (HP 53132) check box. Mine is grayed
out. This would enable the setup box I assume for HPIB quarries.
Thanks...
Don
- Original Message -
From: Didier Juges
To: 'Discussion
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