Re: [time-nuts] HP OCXO warmup graphs

2016-04-24 Thread Bob Camp
Hi The conjecture has always been that all of the 5334B’s with 10544’s were a field swap out. Why would you do such a thing? That’s never been explained. One *might* wonder if the fact that the 5334B sells for about the price of a 10811 and few would notice a (lower value) 10544 is involved ….

Re: [time-nuts] HP OCXO warmup graphs

2016-04-24 Thread Hal Murray
csteinm...@yandex.com said: > And, of course, it's still a matter of interpretation. I look at your plot > and say, Yep, it should be mostly sorted in a month. Someone else might > look at it and say, Looks like 3 days to me. Based on your plot, what do > you say? It still has ~1 more PPB

Re: [time-nuts] HP OCXO warmup graphs

2016-04-24 Thread Charles Steinmetz
Hal wrote: I remember seeing comments that were roughly "it takes a month" and that seemed like a long time. This was a convenient opportunity to collect some hard data. And, of course, it's still a matter of interpretation. I look at your plot and say, Yep, it should be mostly sorted in a

Re: [time-nuts] HP OCXO warmup graphs

2016-04-23 Thread Richard (Rick) Karlquist
On 4/23/2016 6:27 PM, Bob Camp wrote: Hi The 5334 spanned the era when the 10811 was being introduced. I’ve never been able to sort out exactly *what* was in each version as shipped and what got swapped around by various techs over the years. I always *thought* the 10811 was standard for the

Re: [time-nuts] HP OCXO warmup graphs

2016-04-23 Thread Bob Camp
Hi The 5334 spanned the era when the 10811 was being introduced. I’ve never been able to sort out exactly *what* was in each version as shipped and what got swapped around by various techs over the years. I always *thought* the 10811 was standard for the 5334B version. There are a lot of example

Re: [time-nuts] HP OCXO warmup graphs

2016-04-23 Thread Hal Murray
> Does your 5334B have a 10811 in it or some other OCXO? My notes say opt 010 is the "good xtal". HP calls it the "High Stability Timebase (Oven)". I haven't taken the cover off to check the part number. I remember seeing comments that were roughly "it takes a month" and that seemed like a l

Re: [time-nuts] HP OCXO warmup graphs

2016-04-23 Thread Bob Camp
Hi Does your 5334B have a 10811 in it or some other OCXO? Bob > On Apr 23, 2016, at 5:04 PM, Hal Murray wrote: > > > This is the result of a HP 5334B with opt 010 watching a GPSDO. It was > unplugged for a week or two while I was rearranging things. > > You have to stand on your head. No

[time-nuts] HP OCXO warmup graphs

2016-04-23 Thread Hal Murray
This is the result of a HP 5334B with opt 010 watching a GPSDO. It was unplugged for a week or two while I was rearranging things. You have to stand on your head. Normally you assume the reference clock is good and use that to watch some external signal. In this case, the external signal is