In a message dated 2/24/2007 01:49:21 W. Europe Standard Time,
[EMAIL PROTECTED] writes:
The Attached GIF file illustrates one possible approach to a TAC using
discrete components.
Hi Bruce,
interesting schematics. I wonder if the circuit could be modified to
self-calibration on ever
In a message dated 2/24/2007 03:11:22 W. Europe Standard Time,
[EMAIL PROTECTED] writes:
You will find the following presentation contains detail on the
performance of TACs implemented using modern high speed ic technology.
http://hep.uchicago.edu/workshops/2005-picosecond/8-Fukun_Tang_ps_
Didier, thanks a lot for the manuals.
I just tried some of the performance tests on my 5370A and I'm not getting
what the manual says. Starting with the initial tests in Table 4-1, I'm good
until Step 13. Instead of 100nS, I read 10nS all the way through Step 17.
Pressing COMPLMNT shows -90nS. Ste
[EMAIL PROTECTED] wrote:
> Hi Bruce,
>
> would you have some sample schematics for a more modern, faster version of
> this than let's say the one used in the 5334A etc that you could share?
>
> thanks,
> Said
> ** AOL now offers free
> email to everyone.
Jeff,
My 5370A manual calls for 9x9 & the rest XXX in the test you describe. My
unit reads 10x9 for the same test. You might be in need of a full
calibration, but beware of the peculiarities of the test equipment required
& the need to verify all of it is in cal.
It would be interesting to see
[EMAIL PROTECTED] wrote:
Hi Bruce,
would you have some sample schematics for a more modern, faster version of
this than let's say the one used in the 5334A etc that you could share?
thanks,
Said
Said
The Attached GIF file illustrates one possible approach to a TAC using
discrete com
Poul-Henning Kamp wrote:
> In message <[EMAIL PROTECTED]>, "jshank" writes:
>
>
>> I check my 5370b by [...]
>>
>
> The manual is online in PDF somewhere and it has a nice and
> simple to follow procedure, provided you have instruments which
> are suitable substitutes what it prescribes.
>
In message <[EMAIL PROTECTED]>, "jshank" writes:
>I check my 5370b by [...]
The manual is online in PDF somewhere and it has a nice and
simple to follow procedure, provided you have instruments which
are suitable substitutes what it prescribes.
--
Poul-Henning Kamp | UNIX since Zilog Zeus
] [mailto:[EMAIL PROTECTED]
>> Behalf Of Hal Murray
>> Sent: Thursday, February 22, 2007 12:10 PM
>> To: time-nuts@febo.com
>> Subject: [time-nuts] Fine print on HP 5334B
>>
>>
>> (Interesting timing given the SR620 discussion.)
>>
>> I'm
[EMAIL PROTECTED] wrote:
>
> In a message dated 2/23/2007 05:58:09 W. Europe Standard Time,
> [EMAIL PROTECTED] writes:
>
> Current mode ramp generators using long tailed pairs to switch the
> charging current for a capacitor are the time honoured approach for fast
> ramp generators.
>
>
>
Thanks Rick,
I got the PDF!
bye,
Said
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In a message dated 2/23/2007 05:58:09 W. Europe Standard Time,
[EMAIL PROTECTED] writes:
Current mode ramp generators using long tailed pairs to switch the
charging current for a capacitor are the time honoured approach for fast
ramp generators.
Hi Bruce,
would you have some sample sc
Hal Murray wrote:
>> Every time I dig through the 5370 schematics, I think to myself
>> "wouldn't it be nifty to build a replacement plug-in card with a
>> modern fast CPU to run the instrument", but I try and stop myself
>> there.
>>
>
> Suppose you start with an FPGA on a PCI card.
>
> What
Hal Murray wrote:
>> Every time I dig through the 5370 schematics, I think to myself
>> "wouldn't it be nifty to build a replacement plug-in card with a
>> modern fast CPU to run the instrument", but I try and stop myself
>> there.
>>
>
> Suppose you start with an FPGA on a PCI card.
>
> What
--
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Behalf Of Jack Hudler
> Sent: Thursday, February 22, 2007 5:35 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Fine print on HP 5334B
>
>
> Wow that's an easy 8bi
accidently send the source...
Jack
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Scott Newell
Sent: Thursday, February 22, 2007 7:21 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Fine print on HP 5334B
At 07:14 PM 2
At 07:14 PM 2/22/2007 -0600, Jack Hudler wrote:
>LOL You're not alone!
>
>I haven't looked, do you know what the CPU is?
Without checking, I think it's a 6805.
--
newell
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> Every time I dig through the 5370 schematics, I think to myself
> "wouldn't it be nifty to build a replacement plug-in card with a
> modern fast CPU to run the instrument", but I try and stop myself
> there.
Suppose you start with an FPGA on a PCI card.
What sort of front end would you want?
[time-nuts] Fine print on HP 5334B
Every time I dig through the 5370 schematics, I think to myself "wouldn't
it be nifty to build a replacement plug-in card with a modern fast CPU to
run the instrument", but I try and stop myself there.
--
newell N5TNL
___
At 02:14 PM 2/22/2007 -0800, Rick Karlquist wrote:
>
>2. The entire program has to fit into 2KB (two thousand and
>forty eight bytes) of ROM, and was written in assembly language and/or
>machine language and is understandable only to its author (Ken T.)
>It uses every last byte of memory. The 2KB
In a message dated 2/22/2007 22:17:43 W. Europe Standard Time,
[EMAIL PROTECTED] writes:
Mine is off more (or was until it died a couple of weeks ago). But
I have yet to attempt the full cal procedure for reasons similar to yours.
I did find that using GPSDO 10 mhz the error was quite st
Thanks John,
these feedbacks confirm that it is not my mal-handling of the front panel
buttons giving me grief :)
bye,
Said
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In a message dated 2/23/2007 00:41:41 W. Europe Standard Time,
[EMAIL PROTECTED] writes:
At HP, what we liked to do was to run a synthesizer from
the frequency standard and set it to put out an offset
frequency, like 10.0005 MHz. (We had the luxury of having
a lot of 8662's around :-) We
ROTECTED]
> Cc: time-nuts@febo.com
> Subject: Re: [time-nuts] Fine print on HP 5334B
>
>
> I don't have much more of an answer to give you other than
> just reiterating that Ken the software man did more than we
> had a right
I don't have much more of an answer to give you other than
just reiterating that Ken the software man did more than we
had a right to expect, as it is, given what he had to work with.
At HP, what we liked to do was to run a synthesizer from
the frequency standard and set it to put out an offset
fr
In a message dated 2/22/2007 23:15:49 W. Europe Standard Time,
[EMAIL PROTECTED] writes:
3. The interpolator has somewhat questionable accuracy when you
get down to 12 digits. This is hidden somewhat by the firmware,
but if you monitor the bits the interpolator puts out, you can
see what
It's worth keeping in mind a couple of things:
1. The firmware in the 5334B is identical to the 5334A except
for an extremely minor change to accommodate a different modulus
in the C channel.
2. The entire program has to fit into 2KB (two thousand and
forty eight bytes) of ROM, and was written
TED]
>> Behalf Of Hal Murray
>> Sent: Thursday, February 22, 2007 12:10 PM
>> To: time-nuts@febo.com
>> Subject: [time-nuts] Fine print on HP 5334B
>>
>>
>> (Interesting timing given the SR620 discussion.)
>>
>> I'm (finally) getting my GPIB g
On Thu, Feb 22, 2007 at 12:29:35PM -0800, John Miles wrote:
> What do people observe on their 5370A/Bs? After warmup, I tend to see a
> bias of about +0.0005 Hz, or 5E-11, when observing its own 10 MHz source.
> There is some occasional random waffling on the order of about +/- 0.001 Hz
> but for
KE5FX
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Behalf Of John Miles
> Sent: Thursday, February 22, 2007 12:30 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Fine print on HP 5334B
>
>
> What do
com
> Subject: [time-nuts] Fine print on HP 5334B
>
>
> (Interesting timing given the SR620 discussion.)
>
> I'm (finally) getting my GPIB gizmo working.
>
> I have a HP 5334B running off its (good) internal osc looking at
> the output
> of a Z3801A. Assuming the Z3
(Interesting timing given the SR620 discussion.)
I'm (finally) getting my GPIB gizmo working.
I have a HP 5334B running off its (good) internal osc looking at the output
of a Z3801A. Assuming the Z3801A is stable, this is a backwards way of
looking at the internal osc. (There is a shared in/o
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