> > When I saw how badly they handled the external REF-in
I (my company) have one of these. Can you say more? re: SRS, I ran into the CEO -- I have forgotten his name and misplaced his card -- at a local office supply store in Mountain View near the end of 2016. I was behind him in a long'ish xmas line. He was buying some end-of-the-year payroll forms. He was with his wife, and he or she said something that made me realize that he was with SRS. So I introduced myself first as an engineer at a local tech company that knew of his company and then as a time-nut (never lead with the time-nut thing :-)). I explained that I had a couple of SRS rubidium standards, and that there were a bunch of folks in our pro-to-hobby community who really liked the SR620. (Would you please offer me a xmas discount on an SR620, please, I did not ask.) Really nice guy. SRS is a small company -- we chatted about some of the challenges they faced. I related that I could remember doing payroll paperwork by hand once upon a time. -- Christopher. 73 de AI6KG On Sat, Nov 11, 2017 at 2:42 AM, Tom Van Baak <[email protected]> wrote: > > Rank your preferences! > > I echo Magnus. In almost every photo of national timing labs you will see > SR620's in use. The interface, specs, readability, and reliability are > really good. Also SRS seems to support their products forever. For the > curious, the full BOM and schematics are in the service manual. Note they > just added the FS740 (GPSDO) but there's no update for the 620 after all > these years. The downside is that they are larger, heavier, and louder than > many modern instruments. > > For high-performance and high-throughput the CNT-91 is my choice. Quiet, > feather-light, and it's a continuous dual-edge timestamping counter with > raw data output capability. > > That said, when I need a quick or long-term measurement I almost always > grab a HP 53132A and run it in talk-only mode, collecting data with > RS232->USB. Once you get used to the 5 key (arrows & enter) UI you're all > set. > > About the 53230 -- When it came out I got a pair on loan from Agilent; one > with and one without OCXO. When I saw how badly they handled the external > REF-in and how noisy the REF-out was, I figured it was a green team that > designed it and I'd give them another product life cycle to learn about > precision timing. So there are no 53230A in my lab. As soon as they come > out with a redesigned B version where the ext/int REF are good to 1 ps > (like you'd expect with a 12 digit/s counter), I will be the first to buy > one. > > /tvb > > ----- Original Message ----- > From: "Magnus Danielson" <[email protected]> > To: <[email protected]> > Cc: <[email protected]> > Sent: Friday, November 10, 2017 11:50 AM > Subject: Re: [time-nuts] Favorite counters (current production)? > > > Hi, > > I would say CNT-99/91 and SR-620. > > Bob has a point about 53230, since the others is older, but on the other > hand, it is a bit of a gamble. There are many aspects that goes into the > longlivety of a product, such as access to components, but also strategy > of companies. > > The CNT-90/91 an 53230 both have graphical presentation, which is very > beneficial. The SR-620 still have better performance even being older > than everything else. > > Cheers, > Magnus > > On 11/10/2017 05:37 PM, Bob Camp wrote: > > Hi > > > > There is no perfect answer. I’d go with the 53230 simply because it > *might* be supported > > the longest. > > > > Bob > > > >> On Nov 10, 2017, at 11:17 AM, Scott Newell <[email protected]> > wrote: > >> > >> What current production freq counters do people like for general > time-nuttery these days? There's a chance I can get a decent counter for > work, so I'm looking for suggestions. Bonus points for fanless. Don't need > anything past 200 MHz or so. Prefer ethernet over USB or GPIB. > >> > >> The SR620 looks to be pretty big and a little dated. The 53230A seems > to have better specs and screen than the Tek/Fluke FCA3k series. Am I > missing any? > >> > >> Rank your preferences! > >> > >> -- > >> newell N5TNL > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
