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 osci
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
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 wrote:
>
> Le 17 févr. 2014 à 13:49, gandal...@aol.com a écrit :
>
>>
In message , 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 dead on? I don't get that at all.
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 w
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) 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 the crud" but
hy sell an option and be
unwilling to say what it does or how your stock unit functions?
Thomas Knox
> From: t...@leapsecond.com
> Date: Mon, 17 Feb 2014 09:38:28 -1000
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] strange behavior of 53230A or is the light on,
>
>
>
>
>> From: t...@leapsecond.com
>> Date: Mon, 17 Feb 2014 09:38:28 -1000
>> To: time-nuts@febo.com
>> Subject: Re: [time-nuts] strange behavior of 53230A or is the light on,
>> but nobody in?
>>
>> Bob,
>>
>> I'm wonderin
is why sell an option and
>> be unwilling to say what it does or how your stock unit functions?
>> Thomas Knox
>>
>>
>>
>>> From: t...@leapsecond.com
>>> Date: Mon, 17 Feb 2014 09:38:28 -1000
>>> To: time-nuts@febo.com
>>> Subject: Re:
them if I could
enlist your help in addressing potential changes to improve the product.
Thanks;
Thomas Knox
> From: li...@rtty.us
> Date: Tue, 18 Feb 2014 18:00:17 -0500
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] strange behavior of 53230A or is the light on,
>
om: li...@rtty.us
>> Date: Tue, 18 Feb 2014 18:00:17 -0500
>> To: time-nuts@febo.com
>> Subject: Re: [time-nuts] strange behavior of 53230A or is the light on,
>> but nobody in?
>>
>> Hi
>>
>> Well at least this got me digging a little.
>&g
was intentionally vague but said the oscillators were
>>>>> indeed switched out of circuit on the counter with Ext Ref signal
>>>>> applied. These questions were related to several 53132A's I have seen
>>>>> configured with a small board back n
.
>> It couldn't be that they might lose the chance to sell a signal generator
>> ;-), as calibration needs a square wave input, and the Ext. Ref In is
>> ignored.
>>
>>>
>>>> From: li...@rtty.us
>>>> Date: Tue, 18 Feb 2014 18:00:17 -0
nternal timebase is selected.
> > It couldn't be that they might lose the chance to sell a signal generator
> > ;-), as calibration needs a square wave input, and the Ext. Ref In is
> > ignored.
> >
> >>
> >>> From: li...@rtty.us
> >>> Date: Tue, 1
ould welcome your thoughts on the 53230A.
> Thanks;l
> Thomas Knox
>
>
>
>> CC: time-nuts@febo.com
>> From: saidj...@aol.com
>> Date: Wed, 19 Feb 2014 08:25:28 -0800
>> To: time-nuts@febo.com
>> Subject: Re: [time-nuts] strange behavior of 53230A or is the li
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 wo
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