On 29 Jun 2016 17:02, "Stéphane Rey" steph.rey@wanadoo.fr wrote:
Hello there,
I'm planning to buy a such instrument in order to do some frequency
stability measurement at work. The SR620 seems to be discontinued.
It still looks available to me
http://www.thinksrs.com/products/SR620.htm
There is also a Keysight 53230A with a slightly better (20 ps vs 25 ps)
single shot resolution. It looks more modern, but I don't know how well
they compare.
Dave.
Hi Dave,
Yep it looks like it's still available. I've seen discontinued on a
distributor website which made me thinking the product wasn't available
anymore.
I'll look what is the price for the HP53230A for comparison.
Cheers
Stephane
------ Message d'origine ------
De : "Dr. David Kirkby (Kirkby Microwave Ltd)"
drkirkby@kirkbymicrowave.co.uk
À : "Discussion of precise time and frequency measurement"
time-nuts@febo.com; "Stéphane Rey" steph.rey@wanadoo.fr
Envoyé 29/06/2016 18:22:50
Objet : Re: [time-nuts] buying a time interval counter
On 29 Jun 2016 17:02, "Stéphane Rey" steph.rey@wanadoo.fr wrote:
Hello there,
I'm planning to buy a such instrument in order to do some frequency
stability measurement at work. The SR620 seems to be discontinued.
It still looks available to me
http://www.thinksrs.com/products/SR620.htm
There is also a Keysight 53230A with a slightly better (20 ps vs 25 ps)
single shot resolution. It looks more modern, but I don't know how
well they compare.
Dave.
On 6/29/2016 9:22 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
There is also a Keysight 53230A with a slightly better (20 ps vs 25 ps)
single shot resolution. It looks more modern, but I don't know how well
they compare.
Dave.
The 53230A does not offer a 10811 option, but instead offers some
greatly inferior OCXO. Don't waste your money on this oscillator.
If you're reading time-nuts, you probably already have a 10811
or equivalent anyway. The counter itself has the interesting
feature of being able to display Allan deviation using its
own internal math engine. What I have found is that Hadamard
deviation is a lot more useful for screening oscillators, but
all you get with the 53230 is Allan. If you're reading time-nuts,
you can probably figure out how to calculate the DEV du jour.
(There are actually many flavors, as we know). Given the price
of the 53230A, I just don't see a value proposition there.
Rick N6RK