You can't predict the settling time of an opamp from its slew rate or
its gain-bandwidth product.
The TS272 datasheet has no settling time spec whatsoever.
In this case, since there is no spec it needs to be measured.
Opamps with 2 or more cascaded gain stages like these are notorious for
poor
Uhm, isn't this exactly where you want to use the
still-smelling-like-brand-new-car PICTIC II with a good DAC
and a microcontroller ?
I guess the PICTIC II is not very good when stop pulses arrive BEFORE start
pulses which is a normal condition if a average time interval of zero
between
In message 60eb5e7c69594f49b830463dc322e...@athlon, Ulrich Bangert writes:
Uhm, isn't this exactly where you want to use the
still-smelling-like-brand-new-car PICTIC II with a good DAC
and a microcontroller ?
I guess the PICTIC II is not very good when stop pulses arrive BEFORE start
pulses
Hi John
Apologies to you and all for writing via the list but I've had no response
to direct emails so not sure if they're being dumped by a spam filter or
whatever.
You expressed interest in two off 74AC175PC ICs and I would be grateful if
you could contact me again please to confirm
That was what naturally came to my mind too as all of the scads of HP stuff
I have here and use daily is a lot older and 040's were just that, the
HP-IB, now GPIB port board. I sent him an email suggesting it might just be
the Universal option for the I/O of the system as with my 5328A's they are
1993 catalog. Doh. Wish I could recall that and now I have polluted the
list! Sorry everyone.
Warm regards,
Douglas M. Wire, GED, FNA,
PUPCo Studios PUPCo Research Group
mailto:cont...@pupcostudios.com cont...@pupcostudios.com
Description: PUPCo_outlook_2010_sig_1
Even worse for some reason the list got my errant thinking backward, the
HP-IP/GBIP port and MB are correct!
(Re-posting for error correction and in plain-text as I have no idea why the
board picked up that giant string in the domain's email address, for future
reference...)
Warm regards,
Hi
I think it would be nice to have a show of hands as to how many are locking
a Rb to GPS and what they use.
Bert Kehren
In a message dated 7/29/2010 4:00:31 A.M. Eastern Daylight Time,
p...@phk.freebsd.dk writes:
In message 60eb5e7c69594f49b830463dc322e...@athlon, Ulrich Bangert
I do, and I am also interested on other improvements!
Regards,
Arnold
Am 29.07.2010 12:49, schrieb ewkeh...@aol.com:
Hi
I think it would be nice to have a show of hands as to how many are locking
a Rb to GPS and what they use.
Bert Kehren
In a message dated 7/29/2010 4:00:31 A.M.
Hello,
El 29/07/2010 07:48, Hal Murray escribió:
I'm not familiar with windows. I think PIC and AVR come with free software
for windows which works well with their low cost development platforms. The
compiler may be crippled to get you to buy the real version from somebody,
but I'm pretty
Arnold
what do you use? Bert Kehren
In a message dated 7/29/2010 7:02:06 A.M. Eastern Daylight Time,
arnold.ti...@gmx.de writes:
I do, and I am also interested on other improvements!
Regards,
Arnold
Am 29.07.2010 12:49, schrieb ewkeh...@aol.com:
Hi
I think it would be nice to have
I am working with an older Motorola M12M here to develop a new system for
specialized industrial application. Simply using it for the dev. work and
such and will finish off project with the new much better SM product and the
plan is to go FPGA for the thinking. Biggest issue and have never posted
- Original Message
From: Hal Murray hmur...@megapathdsl.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Thu, July 29, 2010 12:48:55 AM
Subject: Re: [time-nuts] Updated Shera controller
stanley_reyno...@yahoo.com said:
Full circle back to the
Interesting you were going to add a fan.
I have 4 5370s and measured the temps on that heat sink.
They were all the same pretty much, so figured HP knew what they were doing.
But it really does feel pretty hot.
Pretty sure what I have picked them up for is not what you paid. Plus they
are heavy.
Bert,
I'm using at the moment a thunderbolt (with spare for testpurposes
using ext. other oscillators), a nice PRS10, a FRK-HLN-1A (5MHz with
external doubler to 10 MHz) and several HP10811.
I would like to build up with this a good and reliable reference
(PPS and Frequ.). My dream would be a good
Op 22 jul 2010, om 16:37 heeft Stanley Reynolds het volgende geschreven:
Just tried to invoice the ones not paid yet but paypal doesn't allow enough
time
for me to complete the invoice and thinks it is OK to dump my work up to that
point, note to self sell ebay stock short and use money
Bert,
I forgot the Shera Board, my first device, which probably could be a bit
tuned...
Arnold
Am 29.07.2010 13:50, schrieb ewkeh...@aol.com:
Arnold
what do you use? Bert Kehren
In a message dated 7/29/2010 7:02:06 A.M. Eastern Daylight Time,
arnold.ti...@gmx.de writes:
I do,
Arnold
how are you controlling the Rb with the Tbolt? Bert
In a message dated 7/29/2010 11:10:16 A.M. Eastern Daylight Time,
arnold.ti...@gmx.de writes:
Bert,
I'm using at the moment a thunderbolt (with spare for testpurposes
using ext. other oscillators), a nice PRS10, a FRK-HLN-1A
Mine have extra heatsink clamped on with 1 inch c-clamps...
Don
paul swed
Interesting you were going to add a fan.
I have 4 5370s and measured the temps on that heat sink.
They were all the same pretty much, so figured HP knew what they were
doing.
But it really does feel pretty hot.
Pretty
I have some old GR tuning forks; they're kinda noisy and bulky, but really
simple!
Don
Douglas Wire - PUPCo Studios
I am working with an older Motorola M12M here to develop a new system for
specialized industrial application. Simply using it for the dev. work and
such and will finish off
Robert: Do you have two left?
Thanks
Don
Robert Darlington
Hi all,
Just a reminder that I'm going to place an order for the PICTIC PIC chips
tonight for those in the USA that want them. The price is $10.00 for the
first one, $2.50 for each additional, including shipping and programming.
1
Hi
Something to think about as you go to tune your Rb:
1) If the tune range is 5 V for 5 x 10^-9 (+/- 2.5x10^-9) then its a ppb /
volt or a ppt / mV. (from http://www.ham-radio.com/sbms/LPRO-101.pdf)
2) If you are after a goal of 1x10^-13, then thats 0.1 ppt and 0.1 mV
3) The Rb pulls
Interesting so others found them a bit to warm also
On Thu, Jul 29, 2010 at 12:18 PM, Don Latham d...@montana.com wrote:
Mine have extra heatsink clamped on with 1 inch c-clamps...
Don
paul swed
Interesting you were going to add a fan.
I have 4 5370s and measured the temps on that heat
Hi
Drift / failure of the three terminal regulators on the rear heat sink seems
to be an often reported issue.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Thursday, July 29, 2010 1:02 PM
To: Discussion of
Hi Stan,
Please tell me how to pay you through Paypal. What is your Paypal account name?
As soon as I get it I would be happy to pay you.
Sincere thanks, David
- Original Message -
From: Henk h...@deriesp.demon.nl
To: Discussion of precise time and frequency measurement
No problem for the PRS10 - there is an external pps input.
For the FRK-RbO I don't have a practical solution yet,
because I don't have a manual with circuit diagram found
for this 5 MHz model. This RbO is actually running free,
drift controlled by an external resistor set by two 10 turns
Arnold
Have you actually done it with the PRS10 and what was the result?
Bert
In a message dated 7/29/2010 1:52:08 P.M. Eastern Daylight Time,
arnold.ti...@gmx.de writes:
No problem for the PRS10 - there is an external pps input.
For the FRK-RbO I don't have a practical solution yet,
Hi:
I have a friend who's setting up an observatory and the PC that controls
the telescope needs to have an accurate clock.
The telescope can point to within arc seconds of a star and that implies
that the computer clock needs to be within 50 ms.
If he does a Windows NTP sync first thing in
Hi
My observation is that the displayed clock on LH can be off by 10 seconds.
That's with the current beta code and Windows 7 on a quad processor machine
or under XP on a dual core machine.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Hi Bert:
The PRS10 can use it's external 1 PPS input two ways.
1) as the input for a GPSDO, or
2) Time Tag (RS-232 command TT) of the input pulse
http://www.prc68.com/I/PRS10.shtml
Have Fun,
Brooke Clarke
http://www.PRC68.com
ewkeh...@aol.com wrote:
Arnold
Have you actually done it with the
with the assumption that he seems to be fine right after a sync,
(seemingly supported in the OP) reconfiguring the windows time service
to update frequently seems to me to be the easiest answer.
under xp you can do so thus:
http://support.microsoft.com/kb/314054
_eric
On Thu, Jul 29, 2010 at
Or even better download a real NTP for windows.
http://www.meinberg.de/english/sw/ntp.htm#ntp_nt_stable
--
Björn
with the assumption that he seems to be fine right after a sync,
(seemingly supported in the OP) reconfiguring the windows time service
to update frequently seems to me to
Thank you Brooke
I have only been with this group for a year so I am not aware of all past
dialog.
What has been the result driving the PRS10 with an external source and
was it a GPS or a Tbolt? I am not trying to be cute but if there is an
alternative with test data I would like to buy one
Hi Eric:
That seems to be for a time server. He is just using an ordinary PC and
NTP to set it's time.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Eric Garner wrote:
with the assumption that he seems to be fine right after a sync,
(seemingly supported in the OP) reconfiguring the
see the section of the article Configuring the Windows Time service
to use an external time source that details how to reconfigure the
winXP time sync service so that it polls and external server for time
at a specified interval.
On Thu, Jul 29, 2010 at 12:10 PM, Brooke Clarke bro...@pacific.net
My paypal account is stanley_reyno...@yahoo.com
boards are 9.50 usd each which includes shipping
Stanley
- Original Message
From: bell@comcast.net bell@comcast.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Thu, July 29, 2010 12:24:39
Hi,
there exist three manuals,
5335-90005 - Serial #2024A and below, 1980, preliminary pdf manual on
agilent.com
5335-90021 - Serial #2224A and below, 1983, pdf from Artekmedia, very
good scan for $7.50
5335-90044 - Serial #3154A and below, 1994, very good reprint from
manualsplus for about
Attenuating the control voltage near the point of use is always a good idea
when you are concerned about common mode or ground noise and particularly when
you have excess dynamic range, but you have to consider the noise added by the
divider. Some filtering may be required, and use as low a set
Once again, one of the 8 received satellites (#16) delivers no
contribution to the time ensmble, although it got is over 40dbc
strength. Lady Heather (beta 3.00) shows a hollow circle in the diagram,
marked yellow in the list, and it has zero CLOCK BIAS and ACCU=0.
Does anybody know, if that
It seems it is beeing moved.
56 16 Launched 29 JAN 2003; usable 18 FEB 2003; operating on Rb std
Scheduled unusable 29 Jul 1345 UT to 30 Jul 0145 UT for
repositioning maintenance (NANU 2010102)
from ftp://tycho.usno.navy.mil/pub/gps/gpstd.txt
btw the Elmer Perkins
Elmer Perkins ??
I know of Perkin Elmer.
73, Dick, W1KSZ
-Original Message-
From: b...@lysator.liu.se
Sent: Jul 29, 2010 5:41 PM
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Subject: Re: [time-nuts] Faulty GPS SAT # 16 on Lady Heather
It seems it is
Thanks!
My mistake. Sorry! Should not be posting this late.
--
Björn
Elmer Perkins ??
I know of Perkin Elmer.
73, Dick, W1KSZ
-Original Message-
From: b...@lysator.liu.se
Sent: Jul 29, 2010 5:41 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Dunno, kinda like it as nickname.
On 7/29/2010 5:02 PM, b...@lysator.liu.se wrote:
Thanks!
My mistake. Sorry! Should not be posting this late.
--
Björn
Elmer Perkins ??
I know of Perkin Elmer.
73, Dick, W1KSZ
--
mailto:o...@ozindfw.net
Oz
POB 93167
Southlake, TX 76092
Yes, there is a time sync command that causes the program to set the system
clock at periodic intervals or whenever it differs from GPS by a given amount.
I'm still out on the Project From Hell Mark II and I don't remember all the
gory details... I think /TSA on the command line says sync
Have you looked at using the TAC32 software?. You can use the 53131A
with it and a GPS receiver and time tag data and log the time interval.
You can tell it to record a one second file, and a average file, for
what ever you set the 53131A up to average, and it will also generate a
satellite
The telescope can point to within arc seconds of a star and that implies
that the computer clock needs to be within 50 ms.
If he does a Windows NTP sync first thing in the evening after a few hours
there's too big an error.
That looks like the classic time vs frequency problem.
What is the
Hi
A divider can do harm if poorly implemented. Knowing the source and load
characteristics can be a big help.
Bob
On Jul 29, 2010, at 5:10 PM, Didier Juges did...@cox.net wrote:
Attenuating the control voltage near the point of use is always a good idea
when you are concerned about
Hi
The main need for Cs apparently is no longer an issue.
Bob
On Jul 29, 2010, at 5:41 PM, b...@lysator.liu.se wrote:
It seems it is beeing moved.
56 16 Launched 29 JAN 2003; usable 18 FEB 2003; operating on Rb std
Scheduled unusable 29 Jul 1345 UT to 30 Jul 0145 UT for
Hi
There is a standard NTP driver that talks Thunderbolt. The full blown NTP
package is pretty easy to set up. It will hold ms accuracy slaved to a GPS.
Bob
On Jul 29, 2010, at 7:29 PM, Hal Murray hmur...@megapathdsl.net wrote:
The telescope can point to within arc seconds of a star and
Hi Hal:
The key thing is pointing, not tracking (where a guide star is commonly
used).
A TPoint model is made by pointing to known stars and the quality of the
model depends on good computer time.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Hal Murray wrote:
The telescope can point
Yes, forecast downtime due to delta V maneuvering. I believe it's
related to the reorganisation of the constellation from 21+3 to 24+3:
http://blogs.agi.com/navigationAccuracy/?p=315
Henry
On Thu, Jul 29, 2010 at 2:41 PM, b...@lysator.liu.se wrote:
It seems it is beeing moved.
56 16
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