Hi,
I have a question for you guys.
I am currently fixing a 5370B and when I check the internal noise I got
23.2pS I think it is a bit too much.
Could you check yours noise?
1) Connect a cable between the rear panel FREQ STD OUT to front panel START
input connector
2) Set the input impedance
Mine measure between 13 and 14 ps
Date: Sat, 12 Mar 2011 11:26:48 +0100
> From: "Jean-Louis Noel"
> To: "Discussion of precise time and frequency measurement"
>
> Subject: [time-nuts] noise of a 5370
> Message-ID: <2FD7B4DFC01B438A86E9675D1909B
At 05:26 AM 3/12/2011, Jean-Louis Noel wrote...
I am currently fixing a 5370B and when I check the internal noise I
got
23.2pS I think it is a bit too much.
Could you check yours noise?
The manual says to expect jitter of 35 ps typical, 100 max. One of mine
is ~30, the other ~20.
___
Hi Mike,
From: "Mike S"
23.2pS I think it is a bit too much.
Could you check yours?
The manual says to expect jitter of 35 ps typical, 100 max. One of mine
is ~30, the other ~20.
Yes, I saw that!
But, where is the logical when your display starts at 100fS?
Bye,
Jean-Louis
__
At 10:45 AM 3/12/2011, Jean-Louis Noel wrote...
Yes, I saw that!
But, where is the logical when your display starts at 100fS?
A mean (average) measurement improves things by the square root of the
number of measurements, if I'm not mistaken. So, if you measure 100,000
times, then a 35 ps jitt
Hi,
The average will approach 0.0 as the number of samples is increased, but not
the standard deviation.. The value displayed by their unit is standard
deviation.
Bye,
Said
Sent from my iPad
On Mar 12, 2011, at 8:47, mi...@flatsurface.com (Mike S) wrote:
> At 10:45 AM 3/12/2011, Jean-Louis N
- Original Message
From: Jean-Louis Noel
To: Discussion of precise time and frequency measurement
Sent: Sat, March 12, 2011 2:26:48 AM
Subject: [time-nuts] noise of a 5370
Hi,
I have a question for you guys.
I am currently fixing a 5370B and when I check the internal noise I got
Mine shows approx 25 ps.
- Original Message
From: Jean-Louis Noel
To: Discussion of precise time and frequency measurement
Sent: Sat, March 12, 2011 2:26:48 AM
Subject: [time-nuts] noise of a 5370
Hi,
I have a question for you guys.
I am currently fixing a 5370B and when I check the
At 12:00 PM 3/12/2011, Said Jackson wrote...
The average will approach 0.0 as the number of samples is increased,
but not the standard deviation.. The value displayed by their unit is
standard deviation.
If you're measuring jitter of an external signal, accuracy is obviously
much worse than t
Hi Everyone,
From: "Mark Spencer"
Mine shows approx 25 ps.
I am currently fixing a 5370B and when I check the internal noise I got
23.2pS I think it is a bit too much.
So, it's not too bad for a device saved from trash!
Ebay 120681814403.
Thanks.
Bye,
Jean-Louis
___
Hi,
My 5370B gives about 21ps
Robert G8RPI.
From: Jean-Louis Noel
To: Discussion of precise time and frequency measurement
Sent: Sat, 12 March, 2011 10:26:48
Subject: [time-nuts] noise of a 5370
Hi,
I have a question for you guys.
I am currently fixing a
Yes, the TI will get more accurate with time. But the setup suggested in
previous email doesn't measure TI.
It measures the standard deviation of that TI. Big difference, two completely
different numbers. The SD number is essentially a measure of the absolute
amplitude of the noise. Since it is
Whilst the standard deviation of the individual measures of TI will be
invariant with the number (N) of TI measurements made (provided the
environment doesn't change and the noise remains white), the standard
deviation of the averaged TI will decrease with increasing N until drift
and non whi
At 09:51 PM 3/12/2011, Said Jackson wrote...
Yes, the TI will get more accurate with time. But the setup suggested
in previous email doesn't measure TI.
No, it's basically one step of the self-testing steps in the manual.
Measuring the jitter of the unit's own clock isn't particularly useful
Hi,
From: "Mike S"
Measuring the jitter of the unit's own clock isn't particularly useful or
interesting for anything other than checking for proper operation.
I agree for the purpose, but the noise mesured is not only the clock noise.
It's the sum of all noises. Not only the clock, 200MHz m
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