Le 19 févr. 2014 à 01:05, Tom Knox a écrit :
Thanks Tom and Bob, I have been thinking of contacting Agilent for some time.
I think they are a great company with some good products, but there are a few
real blind spots in some current products. I also have seen in the past a
genuine
Mike,
They are already giving you another way to calibrate the unit, different from
how you think they should have done it and you are pulling out the statist card
and accusing them of being greedy capitalists?
Come on, thats backseat driving. Be happy they invested millions of their own
That was a wink, Said, not a howl...
Le 19 févr. 2014 à 17:25, Said Jackson a écrit :
Mike,
They are already giving you another way to calibrate the unit, different from
how you think they should have done it and you are pulling out the statist
card and accusing them of being greedy
I hope I have not come off sounding like that Said, I simply would like to see
a great product better, I am hoping/committed to work with Agilent toward a
better product if they are interested. And in the past I have found they are
interested in our feedback. The 53132A was revolutionary in
Sorry early morning rant,
There are counters out there already that can do 14/15 digits: tsc5125A and the
Miles box for example. Very difficult to get a reference into that counter that
can match and provide that type of stability.
I am sure Agilent would love to hear our feedback probably as
On 2014-02-19 22:34, Said Jackson wrote:
Sorry early morning rant,
There are counters out there already that can do 14/15 digits: tsc5125A and the
Miles box for example. Very difficult to get a reference into that counter that
can match and provide that type of stability.
I am sure Agilent
I have asked Agilent
if stock versions of the 53230A and 53132A switched the internal oscillator out
of circuit with an Ext Ref signal
applied. I thought
Agilent's engineer was intentionally vague but said the oscillators were
indeed switched out of circuit on the counter with Ext Ref signal
TomK,
If anyone has technical contacts deep within Agilent, let's see if this issue
can be resolved. I would have bought a 53230A when it came out a few years ago
but my eval units showed this clock noise problem. That plus the poor quality
of the ref out made me think the designers were
Hi
Well at least this got me digging a little.
If you grab a copy of the 53230A spec sheet and look under the external
reference input, it’s pretty well described. It will accept 1, 5,10 MHz as an
external reference. It will lock over a 1 ppm range with the XO option and 0.1
ppm with the
Thanks Tom and Bob, I have been thinking of contacting Agilent for some time. I
think they are a great company with some good products, but there are a few
real blind spots in some current products. I also have seen in the past a
genuine interest in listening. I would be willing to approach
Something that must be simple to explain, but that I can't get my head round.
I got a new 53230A.
When first using it, I measured my T-Bolt 10MHz using the internal 10MHz
timebase and it came up short of 10MHz, 9.999 998 5xx. I wasn't worried about
it as the counter only has a TCXO internal
Did you disconnect the external reference from the 53230A before doing the
test?
If no, I'll bet that the external reference being connected overrides the
internal reference
Regards,
David Partridge
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Le 17 févr. 2014 à 13:49, gandal...@aol.com a écrit :
Hi Michael
Internal reference out is likely to be of the actual reference in use, ie
with an external reference connected that's what will be on the output
connector and would explain what you're seeing.
Your initial test, using
Hi
It locks up the internal reference to the external reference when the external
reference is present. It’s the same behavior as the
5334,5335,5345,5360,5370,5318x,and 5313x.
Bob
On Feb 17, 2014, at 8:31 AM, mike cook michael.c...@sfr.fr wrote:
Le 17 févr. 2014 à 13:49,
In message ff58a3fc-3e6a-4b13-83e3-c1363a556...@sfr.fr, mike cook writes:
So at that point I decided to measure the Internal TB against my
reference. So I connected the Int. Ref. Out to channel 1, connected
my PRS10 ref to Ext. Ref In, selected the EXT time base and found
that the count was 10MHz
Hi Mike,
The most likely answer is when you select external time base for an
input, it disables the connection for the internal oscillator. The
external input signal is probably also routed straight to the reference
output jack.
However, it would be good to read the manual, as they usually
Hi
If you dig into the schematics (when they supplied them … ):
The external reference goes into a phase detector. It’s one of those digital
ones that can lock up to many inputs. You could feed 3. MHz in as a
standard input as well as 0.5, 1, 2.5, 5, and 10 MHz. The internal oscillator
Bob,
I'm wondering if you (or any else) has measured the PLL performance of the
53230-series?
I agree it will clean up the crud but this assumes the ext ref is dirtier
than the internal osc.
What I found instead was that if you use a good external ref the PLL actually
makes it worse. This
Hi
I have a 53230, but have not gotten around to looking at it’s PLL cleanup
process.
Bob
On Feb 17, 2014, at 2:38 PM, Tom Van Baak (lab) t...@leapsecond.com wrote:
Bob,
I'm wondering if you (or any else) has measured the PLL performance of the
53230-series?
I agree it will clean up
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