Hi Steve,
I don't know if this is a typo, but one of the copies of the 1991/1992
manual lists the 04E temperature performance as "<= 7 x 10e-9 over the
range of 0C to 50C". i.e. not per degree C. That would be the same as
"<=1.4 e -10 per degree C".
Could that explain the apparent contradiction of superior construction
and inferior temperature performance? By the way, do you have any
details on the superior construction?
Ed
Steve Rooke wrote:
The output of all oscillators is 10MHz, 04B an 04E have doublers
connected to the 5MHz ocxo (04A? I only have the B and E versions).
Part # 04A 11-1710
Frequency: 10MHz
Aging Rate: 3 x 10^-9 / day averaged over 10 days after 3 months
continuous operation.
Temperature Stability: +-3 x 10^-9 / C averaged over range 0 to +45C
(operable to +50C).
Warm Up: Typically +-1 x 10^-7 within 6 minutes.
Part # 04B 11-1711
Frequency: 10MHz
Aging Rate: 5 x 10^-10 / day averaged over 10 days after 3 months
continuous operation.
Temperature Stability: +-6 x 10^-10 / C averaged over range 0 to +45C
(operable to +50C).
Warm Up: Typically +-1 x 10^-7 within 20 minutes.
Part # 04E 404386
Frequency: 10MHz
Aging Rate: <=5 x 10^-10 / day averaged over 10 days.
Temperature Stability: <=7 x 10^-9 / C averaged over range 0 to +50C.
Line Voltage Stability: <=5 x 10^-10 two minutes after a 10% line
voltage change.
The 04E option is from a later series of the 1992 and has a superior
construction than the 04B but the specs show it has an inferior
temperature stability. I have various pdfs collected over time if
anyone wants them, PM me.
73,
Steve
2009/8/28 Ed Palmer <[email protected]>:
As far as I can tell, all the 1991/1992 oscillators are 5 MHz. They all
have a frequency doubler board attached to the bottom of the oscillator.
Some are labelled as 5 MHz, some are labelled as 10 MHz. But they all
interface to the counter at 10 MHz.
Ed
[email protected] wrote:
I think this series is not the one used on 1992, but on racal receivers
and exciters. I have some, and they look different. They have a 5 MHz
output, while the 04E is rated at 10 MHz, even if the crystal is cut for 5
MHz.
Antonio I8IOV
Hi Alan,
Small attachments seem to be okay. Let's find out! :-)
I didn't realize that there was a whole family of 9400 series
oscillators. Unfortunately, your sheet doesn't include the part numbers
that the 1991/1992 documentation includes although there are some family
similarities. Still, it's good info to have.
Thanks,
Ed
-------- Original Message --------
Ed off list as I suspect the list wont accept attachments
Best wishes
Alan G3NYK
----- Original Message -----
From: "Ed Palmer" To: "Discussion of precise time and frequency
measurement"
<[email protected]>
Sent: Thursday, August 27, 2009 8:01 PM
Subject: Re: [time-nuts] Racal 1992
Hi Alan,
I have the same info, but it's collected from multiple sources. I
haven't seen all of it in one official source. I'd like to see it and
I'm sure others would as well.
Ed
Alan Melia wrote:
Hi Ed I dont know whther it would be of interest but i have a page from a cat
with the comparative specs for those OXCOs
Alan G3NYK
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