Hi
We ran 5335’s in “long gate” mode via the gate open / gate close commands. It
worked, but you had to
compensate for rollovers. My guess is that you would run into similar stuff on
the 5370A. Simple answer
is to try it and see … That’s what we did on the 5335 and then worked through
all the
Hi Perry,
You should get the upgraded CPU board, since the 6800 of the 5370A/B
will be a limit. It will allow you to get up to those speeds without too
much pain. As added benefit you also get an Ethernet connection to it.
Cheers,
Magnus
On 05/31/2018 05:19 AM, Perry Sandeen via time-nuts
List,
I'd like to do 1000 second TIC measurements with my 5370B but I don't want to
have to perchase A HP 1B prologic or similar controller for the timeing.
As long as I'm interested in the TIC difference but not an absolute value is it
reasonable to use the manual start/stop switches and a
.
From: Mark C. Stephens ma...@non-stop.com.au
To: Robert Atkinson robert8...@yahoo.co.uk; Discussion of precise time and
frequency measurement time-nuts@febo.com
Sent: Saturday, 6 July 2013, 22:39
Subject: RE: [time-nuts] HP 5370B dropping mains voltage
How Does that Work
On 07/06/2013 07:55 AM, Adrian wrote:
Mark,
I wouldn't replace a 20V cap with an only 10V rated one, especially when the
nominal working voltage is alrady 10V. That would be a very bad idea.
You can always use caps with higher voltage ratings as replacements which is
good for reliability,
I went to use my 5370B todayt and noticed the LEDS on the display are slowly
sort of pulsing bright one after another.
Also all the push button LEDS are going on and off one by one.
The strangest thing is that it appears to be working o/k via HPIB.
I don't have extender boards but I do have a
be a lot
more than 4.2V unless the overvoltage Zener is able to sink all that current...
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:18 PM
To: time-nuts@febo.com
Subject: [time-nuts
as I rely on it tremendously.
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:47 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:18 PM
To: time-nuts@febo.com
Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS scannning and appears to be reading o/k
I
...
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:18 PM
To: time-nuts@febo.com
Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally,
PB LEDS scannning
on it
tremendously.
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:47 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of gandal...@aol.com
Sent: Saturday, 6 July 2013 9:37 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB ...
As per my reply to the same
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Adrian
Sent: Saturday, 6 July 2013 9:19 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS scannning
are
starting to talk some serious current there.
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of gandal...@aol.com
Sent: Saturday, 6 July 2013 9:37 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly
Mark C. Stephens wrote:
Correct, C3 (17000uf @ 10v) is measuring 39uf :)
I have a 29000@10V, same dimensions, do you think the rectifiers can hack that
big fella?
Without a blush!
-Chuck Harris
1uf is quite a bit more.
___
time-nuts mailing
Mark C. Stephens wrote:
Correct, C3 (17000uf @ 10v) is measuring 39uf :)
I have a 29000@10V, same dimensions, do you think the rectifiers can hack that
big fella?
Without a blush!
Except for the 10V part. (Which I missed on the first post)
You have to use a capacitor that is at least 2x
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Adrian
Sent: Saturday, 6 July 2013 10:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB ...
Mark,
I wouldn't
July 2013 11:05 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS scannning and appears to be reading o/k
Mark C. Stephens wrote:
Correct, C3 (17000uf @ 10v) is measuring 39uf :) I have a 29000@10V
Running load might not be quite as bad as you'd expect, switching them all
on at exactly the same time would probably cause a nice fat pulse but
perhaps that's a bit extreme:-), allowing an adequate margin though is always
a
good idea.
If you could tap into the supply and get an idea of
You wouldn't even need a UPS, check Google for mains voltage conditioners.
APC's kit, for example, should be available worldwide and they make a
range that, here in the UK anyway, starts for under 50 GBP.
Regards
Nigel
GM8PZR
In a message dated 06/07/2013 13:26:06 GMT Daylight Time,
on it
tremendously.
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:47 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB ...
Hi Nigel,
The only screw type electro can find is 29000uf@10V. it's the same dimensions.
Should I risk the strain on the rectifiers (another 10Kuf is rather a lot)?
Without this timer I am dead in the water
.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Orin Eman
Sent: Sunday, 7 July 2013 2:12 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS
...@febo.com] On Behalf
Of Robert Atkinson
Sent: Sunday, 7 July 2013 12:57 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B dropping mains voltage
Hi Marki,
Dropping the mains voltage is easy. Get a mains to low voltage transformer.
Connect
On 7/6/13 2:46 PM, Mark C. Stephens wrote:
Hopefully HP Voltage Derated the Cap as well so it can handle our
250V here.. We are across the road from the main transformer for the
area so the voltage is highest at our place, I checked the meter box
this morning - it is 255-258V on all 3 phases,
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Jim Lux
Sent: Sunday, 7 July 2013 8:01 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS scannning
=102 Volts). Had I connected the Dry-Disk
transformer's winding in series and in phase I would've had 138 volts.
I hope this helps.
Burt, K6OQK
Subject: Re: [time-nuts] HP 5370B dropping mains voltage
How Does that Work Robert?
I mean why out of phase?
-Original Message-
From: time
.
marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Jim Lux
Sent: Sunday, 7 July 2013 8:01 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally
: Sunday, 7 July 2013 9:29 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS scannning and appears to be reading o/k
Check with your power company. They may be able to switch taps on the
transformer to reduce the voltage. I don't
July 2013 9:28 AM
To: time-nuts@febo.com
Subject: [time-nuts] HP 5370B dropping mains voltage...
This is an old trick that I learned many years ago. By taking a transformer,
driving its primary from the mains and then feeding that transformer's
secondary voltage in series (either in phase or out
Using a common filament transformer as a buck/boost reduces
the insulation requirement between the primary and secondary.
It does this by connecting the primary to the secondary.
-Chuck Harris
Mark C. Stephens wrote:
The elephant in the room thing with me is SAFETY :)
I mean, can this be a
On 7/6/13 5:26 PM, Mark C. Stephens wrote:
The elephant in the room thing with me is SAFETY :)
I mean, can this be a fire hazard, what about the insulation breakdown on the
secondary winding etc..
Most transformers have a voltage rating on ALL windings that is greater
than several times
@febo.com
Sent: Saturday, July 6, 2013 8:26 PM
Subject: Re: [time-nuts] HP 5370B dropping mains voltage...
The elephant in the room thing with me is SAFETY :)
I mean, can this be a fire hazard, what about the insulation breakdown on the
secondary winding etc
] On Behalf
Of Burt I. Weiner
Sent: Sunday, 7 July 2013 9:28 AM
To: time-nuts@febo.com
Subject: [time-nuts] HP 5370B dropping mains voltage...
This is an old trick that I learned many years ago. By taking a transformer,
driving its primary from the mains and then feeding that transformer's
and frequency measurement
Subject: Re: [time-nuts] HP 5370B dropping mains voltage
Hi Marki,
Dropping the mains voltage is easy. Get a mains to low voltage transformer.
Connect the primary across the mains and the secondary in series opposition
(out of phase) with the mains supply. Foar example
Hi
It's a rare filament transformer that does not have fairly substantial voltage
ratings on the secondary. They rated them so you could directly heat rectifiers
off of them. That could / would put the full high voltage winding onto the
filaments.
Bob
On Jul 6, 2013, at 9:02 PM, Jim Lux
The recent thread on the 5370B resolution reminded me of a couple of
questions I have about my unit. Mine has a bit of a noise problem so I
thought I'd work through the operator verification tests and a couple of
the diagnosic flowcharts and see what popped up. The results turned out
to be
I put a post on here a day or two ago saying I had a 5370B for sale.
It has now been sold.
Dave
___
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions
Hello,
I’m re-building the User Service manual for the 53070B counter, cleaning the
pages and stitching all the schematics so they are easier to read.
I’ve found several different manuals on the internet but all of them are
missing the page fifth part of page 8-99, which folds out on page 297
In message bay146-ds4f2c6323b4ea3f3ad2f96b2...@phx.gbl, Roberto Barrios wri
tes:
I belive the pdf file is made from my manual, so presumably that part of
the page should still be physically in it, so if nothing else I can
scan a copy of that...
--
Poul-Henning Kamp | UNIX since Zilog Zeus
In message bay146-ds4f2c6323b4ea3f3ad2f96b2...@phx.gbl, Roberto Barrios wri
tes:
I belive this is the bit you are missing:
http://phk.freebsd.dk/misc/hp5370b-p8-99.pdf
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer
Distinguished Gents,
As soon as I get my replacement GPS hockey puck antennas, and get my Lucent GPS
receivers going I want to get into some serious testing and calibration of my
rubidium and Xtal oscillators. I plan to run two GPS receivers independently
into two 5370B TICs simultaneously
...@febo.com
Subject: [time-nuts] HP 5370B Output Help Needed
Distinguished Gents,
As soon as I get my replacement GPS hockey puck antennas, and get
my Lucent GPS receivers going I want to get into some serious
testing and calibration of my rubidium and Xtal oscillators. I
plan to run two
After cooling and restarting the 5370B and observing its behavior, we
judged that it was more likely it had an unheated 10811 than an
oscillator of lower stability, so we popped the lid (the possibility
that it didn't have a 10811/10544 was the reason for leaving it
intact so it could be
Paul wrote:
Speaking of filters.
* * *
many if not all of the filter material is degenerated.
Its soft and sticky. At a min get rid of it.
My environments clean so I leave them out.
Have never found a replacement. Maybe some home depot air filter.
The HP 5345A manual specifically
The black/green Scotchbrite pads contain an abrasive which
might be friable. I am not sure about the white, but they
probably contain something as well. Just something I worry
about when using non filter materials as filters.
I find that the easiest source of the exact material is in
the
The catch with the thermal fuse in an un-plated socket is that as it
ages the socket oxidises and
the heater current generates enough ohmic heating through a high
resistance socket
to heat the fuse through its leads. This opens the fuse the next time
the oven is heated from cold.
I just
The blue Scotch Brite pads also have friable material in them, avoid.
Consider visiting your local HVAC (heating, ventilation, and air
conditioning) shop
Sheet filter material is commonly available from them,
and it does not deteriorate like the foam stuff.
Review all grades and thicknesses
-nuts-boun...@febo.com] On
Behalf Of Neville Michie
Sent: Wednesday, September 15, 2010 8:32 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B - result
The catch with the thermal fuse in an un-plated socket is that as it
ages the socket oxidises
measurement
Subject: Re: [time-nuts] HP 5370B - result
The catch with the thermal fuse in an un-plated socket is that as it
ages the socket oxidises and
the heater current generates enough ohmic heating through a high
resistance socket
to heat the fuse through its leads. This opens the fuse
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] HP 5370B - result
According to my manual, it is HP Part Number 10811-80008, which is described
as UTG Fuse-Thermal 115C 1.0A 250V, in stock at HP for $5.69, available
until gone. The old part number is 2110-0617.
I presume
Good advice Burt.
While we're on the subject of over-heating issues, on instruments with fan
filters, I'd like to mention the importance to clean their fan filters at
regular intervals.
See:
http://www.hparchive.com/Bench_Briefs/HP-Bench-Briefs-1995-01-03.pdf
Greg
-
Burt
I'm not familiar with the 5370B and I may be way off on this, but I
wanted to pass along some information regarding another piece of HP
gear that I have which ran pretty hot, too hot in my
opinion. Hopefully this will save someone else from the same grief I
went through.
I have a HP-3336A
Speaking of filters.
Thanks for putting the HP brief up. They are always a good read.
Especially since these days I can afford that gear.
That said many if not all of the filter material is degenerated.
Its soft and sticky. At a min get rid of it.
My environments clean so I leave them out.
Have
Yeah, good advice to get rid of the fan filter material, Paul. With the HP
8568B 8566B, Signal Analysis Division (SAD) weighed the pros and cons of
keeping the instrument clean vs. risk of over-heating if the fan filters
were not kept clean. They decided in favor of reduced risk of heat
I guess with humor, I clean up 20 years of stuff on/in the gear. Almost
always straight off.
Reason. That forces a very good inspection. You find all kinds of clues as
to what might be up. Burnt caps, resistors, loose wires and such.
Other thing I do is measure all supplies while cold looking for
I thought I would contribute a 5370B ROM version and possibly add a
later ROM image to the collection. I should have left it to the experts. I am
afraid that all I accomplished was to brick my 5370B: Serial number 2438A
01154, Board 05370-60109, U3. U3 is a plastic chip with no
Just a quick report.
The 5370B ROM image seems to work just fine in a 5370A. At least one
GPIB sequence which would cause the original firmware to hang now seems
to work fine.
I put up a page describing how to change to the newer firmware, based
mostly upon an earlier post by Mark Sims:
Thanks, Mike. I've archived that page along with the firmware, just in
case. Nice work, BTW!
*** REPLY SEPARATOR ***
On 18-Oct-09 at 11:44 mi...@flatsurface.com wrote:
Just a quick report.
The 5370B ROM image seems to work just fine in a 5370A. At least one
GPIB
Mike S a écrit :
Just a quick report.
The 5370B ROM image seems to work just fine in a 5370A. At least one
GPIB sequence which would cause the original firmware to hang now
seems to work fine.
I put up a page describing how to change to the newer firmware, based
mostly upon an earlier post
Mike S wrote:
Just a quick report.
The 5370B ROM image seems to work just fine in a 5370A. At least one
GPIB sequence which would cause the original firmware to hang now seems
to work fine.
I put up a page describing how to change to the newer firmware, based
mostly upon an earlier post by
At 12:28 PM 10/18/2009, Sylvain RICHARD wrote...
What exactly was fixed by using the newer firmware? Random hangs or
specific bugs?
It's not documented, AFAIK. Mine seemed to hang pretty regularly if I
tried to do a GPIB interface clear/device clear while it was in talk
mode and in the
Mike S wrote:
Just a quick report.
The 5370B ROM image seems to work just fine in a 5370A. At least one
GPIB sequence which would cause the original firmware to hang now
seems to work fine.
I put up a page describing how to change to the newer firmware, based
mostly upon an earlier post by
At 01:29 PM 10/17/2009, J. Forster wrote...
Have you tried the BlueFeather site?
The one associated with the Society for Creative Anachronism? No.
There's a bluefeathertech.com domain, they have 5370A images on their
ftp server, but nothing for the 5370B.
Dieder and Bruce now have the image to put in their archives...
_
Hotmail: Trusted email with powerful SPAM protection.
http://clk.atdmt.com/GBL/go/177141665/direct/01/
And it's now in a directory all its own.
Thanks much!
*** REPLY SEPARATOR ***
On 17-Oct-09 at 22:25 Mark Sims wrote:
Dieder and Bruce now have the image to put in their archives...
At 06:35 PM 10/17/2009, Joseph Gray wrote...
Didn't someone here say that there were two different firmwares for
the 5370B? The early one is supposed to have its own issue with GPIB.
If true, then how to tell which version you are burning?
Reference:
The ROM image came from a unit with date code 2332A. There was no ID on the
EPROM chip. The window was covered by a piece of green tape that had no
markings.
_
Hotmail: Powerful Free
I got in a HP5370B counter that was oh so very dead. I think this was a parts
unit where all the dead boards went after they died horrible deaths... Well,
I have it working now except one channel (the right one) on the input card is
blown. The problem is the 5088-7062 amplifier chip (this
Hi All,
I'm downsizing at the moment and am somewhat unwillingly considering disposing
of my 5370B and prologix USB-HPIB converter. I thought I'd look for offers from
any interested UK list members before considering dealers or e...@.
I Also have a Saunders 150C Crystal activity meter. It would
Bruce/Magnus
Thank you for your comments.
Roy
- Original Message -
From: Bruce Griffiths bruce.griffi...@xtra.co.nz
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Wednesday, May 20, 2009 12:42 AM
Subject: Re: [time-nuts] HP 5370B vs SR620
Hej
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but what
it can do - especially given its vintage - makes it a perfect unit for my
rack!
And the manual (plus people here) make it really great if there are ever any
problems.
Don't underestimate the
on the
5335A seem to be similar.
Roy
- Original Message -
From: Jim Palfreyman jim77...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday, May 19, 2009 10:35 AM
Subject: Re: [time-nuts] HP 5370B vs SR620
I have a 5370B and love it.
It's
10:35 AM
Subject: Re: [time-nuts] HP 5370B vs SR620
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but
what
it can do - especially given its vintage - makes it a perfect unit for my
rack!
And the manual (plus people here) make it really
Jim Palfreyman wrote:
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but what
it can do - especially given its vintage - makes it a perfect unit for my
rack!
And the manual (plus people here) make it really great if there are ever any
problems.
of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B vs SR620
Jim Palfreyman wrote:
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit
itself, but
what it can do - especially given its vintage - makes it a perfect
unit for my
Roy,
The 5370s have a few quirks that you should know about to avoid
possible surprises. These aren't newly discovered have been the
subject of various postings a few years ago.
1) Both instruments have some front end coupling with the data path
the timebase. This was mostly corrected in
In message 54d2d91a9dd3422b80f4f02de65e9...@d400, Didier Juges writes:
I have two 5370A but no 5370B, so I cannot comment on practical differences,
beyond the catalog specs.
I belive there is a difference in the input circuitry also, I recall
that the B has a more capable input section than the
Pete
Thanks for the information.
Regards
Roy
- Original Message -
From: Pete peteraw...@earthlink.net
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday, May 19, 2009 3:27 PM
Subject: Re: [time-nuts] HP 5370B vs SR620
Roy,
The 5370s have
According to the 1986 catalog, the 5370B is capable of 6000 readings per sec
in the fast binary mode.
According to the 1983 catalog, the 5370A is capable of 6000 readings per sec
in the fast binary mode.
In 1992, they upped the spec to say: up to 8000 readings per second in the
fast binary
Poul-Henning Kamp wrote:
In message 54d2d91a9dd3422b80f4f02de65e9...@d400, Didier Juges writes:
I have two 5370A but no 5370B, so I cannot comment on practical differences,
beyond the catalog specs.
I belive there is a difference in the input circuitry also, I recall
that the B has a more
There is an interesting application note on the differential linearity
issue. Apparently the problem was found by a Tektronix engineer, and HP
provided a correction to fix the problem in the 5370A. That correction,
I believe, is available on Bama.
-Chuck Harris
Pete wrote:
Roy,
The 5370s
As to the socket issue, my 5370A has been dead reliable. No problems at
anytime.
I think your socket issue is unique to your unit, or perhaps the
series your
unit came from.
I've heard of socket failures happening on at least one 5370A besides
Didier's, but I don't think it's reached
Jim Palfreyman skrev:
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but what
it can do - especially given its vintage - makes it a perfect unit for my
rack!
And the manual (plus people here) make it really great if there are ever any
problems.
Roy Phillips skrev:
Jim
I was interested to hear that you are very fond of your vintage Counter
(HP5370B), and I have downloaded the manual from the Agilent website.
I recently purchased an HP 5335A, again a vintage model, and I have yet
to assess it completely - is the 5370B much superior ?
Hej Magnus
One issue is that the SR620 is still in production.
Thus obtaining spare parts may be a little easier than for the HP5370A.
Bruce
Magnus Danielson wrote:
Roy Phillips skrev:
Jim
I was interested to hear that you are very fond of your vintage
Counter (HP5370B), and I have
No I haven't. What does this mod do?
2009/5/20 Magnus Danielson mag...@rubidium.dyndns.org
Jim Palfreyman skrev:
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but
what
it can do - especially given its vintage - makes it a perfect unit for
Hi John,
I know that socket problems in the 1970's could be a real
bear, but most of them started very early in the life of
the product. For instance, I had heard about smacking
Apple I memory on the table to fix problems by the time
they had been out for only a couple of years.
Maybe my 5370A
Jim Palfreyman skrev:
No I haven't. What does this mod do?
Disabling the 10 MHz presence detector that spews out wideband 5 MHz and
lots of overtone noise on among other things the 10 MHz output.
I did a very simple short which brings one of the transistors out of
bias and thus disabling
In message [EMAIL PROTECTED], Didier Juges writes:
If a piece of black tape covering the lsd would turn
2.01 into 2.0, would that solve the problem?
Doesn't that only solve the problem if the black tape knows about 4/5
rounding ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[EMAIL
Hi All,
This is my first 5370B so I knew nothing about its expected behaviour.
I bought it on eBay as the song goes and when it arrived I could see damage
to the top right corner of the front frame that the operator panel screws
into.
It looked like it had been dropped and dropped quite
In message [EMAIL PROTECTED], marks twotoe.com writ
es:
Now, although it seems deceptively simple, I can't decide whether to tune
the multiplier or not.
If you have a good spectrum analyser and follows the procedure, it's
not tricky at all.
--
Poul-Henning Kamp | UNIX since Zilog Zeus
From: Poul-Henning Kamp [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B
Date: Sun, 11 May 2008 06:36:26 +
Message-ID: [EMAIL PROTECTED]
In message [EMAIL PROTECTED], Didier Juges writes:
If a piece of black tape covering the lsd would turn
2.01 into 2.0, would that solve
At 10:48 PM 5/10/2008, Tom Van Baak wrote...
If a piece of black tape covering the lsd would turn
2.01 into 2.0, would that solve the problem?
Why not tape over the whole display, or better yet, just completely
avoid the cost of instrumentation and ship the DUT without testing?
I can see we now agree this was a silly discussion :-)
Didier KO4BB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mike S
Sent: Sunday, May 11, 2008 5:43 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP
From: Didier Juges [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B
Date: Fri, 9 May 2008 20:11:42 -0500
Message-ID: [EMAIL PROTECTED]
Mark,
The 5335 is specified at 9 digits/second of resolution, the 5370 is
specified at 12 digits/second.
That is severly overoptimistic on the 5370's
Magnus Danielson wrote:
Mark,
The 5335 is specified at 9 digits/second of resolution, the 5370 is
specified at 12 digits/second.
That is severly overoptimistic on the 5370's part and just about
overoptimistic
on the 5335's part. I think you should not use those sales-numbers, as
-Original Message-
From: Magnus Danielson [mailto:[EMAIL PROTECTED]
Sent: Saturday, May 10, 2008 5:09 AM
To: time-nuts@febo.com; [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B
From: Didier Juges [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B
Date: Fri, 9 May 2008 20:11
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Didier Juges
Sent: Saturday, May 10, 2008 8:08 AM
To: Time-Nuts
Subject: Re: [time-nuts] HP 5370B
That's a good illustration of the difference between
precision and accuracy
At 09:22 AM 5/10/2008, Didier Juges wrote...
Most microwave network analyzers have amplitude
resolution of 0.01dB, while their accuracy is just around 1dB in most
cases.
I have had to argue too many times that a piece of equipment with a
2dB p-p
requirement on flatness was just fine when it
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