@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/31/2013 5:24 AM, Mark C. Stephens wrote:
Hi Ed,
Well, since you've apparently given up on time-wasters like sleep, there are
a few things that you can do while you wait.
My daytime job is level 2 remote support so I seem to get by on about 6
On 6/1/2013 9:47 AM, Mark C. Stephens wrote:
Yep, Phase plot is like a Saw tooth.
So, despite the 'lock' LED, it isn't locked. Well, maybe something's
locked, but we're not sure what.
I plugged the house standard as external reference (I am sure I did that
already) and it still drifts
-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Sunday, 2 June 2013 3:36 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 6/1/2013 9:47 AM, Mark C. Stephens wrote:
Yep, Phase plot is like a Saw tooth.
So, despite the 'lock' LED, it isn't locked. Well, maybe something's
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of J. L. Trantham
Sent: Friday, 31 May 2013 12:32 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 9390 GPS RX
So, probably means that it is 'flashing', on and off. :^).
Joe
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Friday, 31 May 2013 3:58 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/30/2013 9:44 PM, Mark C. Stephens wrote:
Oh No, it stayed locked, I sat there until 4:30am watching
On May 24th Mark C. Stephens asked:
Does the 9390-5588A have the 16.618 Mhz Vectron oscillator externaly
located on one of the wire wrap boards?
Well I had to dig it out and open it up to see. Actually I mispoke
when I said my 9390 had an FRK, it turned out that was another unit
I was thinking
questions and decide which directions
are dead ends.
Ed
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Friday, 31 May 2013 3:58 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/30/2013 9:44
...@febo.com] On Behalf
Of Arthur Dent
Sent: Friday, 31 May 2013 10:26 PM
To: time-nuts@febo.com
Subject: [time-nuts] 9390 GPS RX
On May 24th Mark C. Stephens asked:
Does the 9390-5588A have the 16.618 Mhz Vectron oscillator externaly located
on one of the wire wrap boards?
Well I had to dig
snip
Upon Power up All settings are lost, error 17 - Battery Failed.
The battery is a as dead as a dodo I am afraid.
I have my eye out for the same type, I have found a few but the last 2
Digits of the Dallas part number differ even though they look the same.
As it has a sealed Lithium
-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/29/2013 10:14 PM, Mark C. Stephens wrote:
Ah, The old Section 2 part (in Don Adams voice)
Okay, I have been watching the timer out of the corner of my eye, and there
is a trend.
The TI difference gradually falls down to about 3ns (good
On 5/30/2013 1:24 AM, Mark C. Stephens wrote:
Ed, et al,
I was just cleaning up the workbench and this gave me time to reflect of the
FRK repair.
I'd just like to say thanks for your help and Guidance Ed, without it, I
probably would have got there in the end but I would have not been as
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Friday, 31 May 2013 2:11 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/30/2013 1:24 AM, Mark C. Stephens wrote:
Ed, et al,
I was just cleaning up
So, probably means that it is 'flashing', on and off. :^).
Joe
So, it's been sitting there for a couple of hours before the Lock LED came
on.
Interestingly enough, I woke up (its 3am here) and I thought, Hmm wonder if
its locked.
I walked down stairs to the workshop and looked at the front
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of J. L. Trantham
Sent: Friday, 31 May 2013 12:32 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 9390 GPS RX
So, probably means that it is 'flashing', on and off. :^).
Joe
[mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Wednesday, 29 May 2013 8:10 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
The frequency offset of 3e-9 is still very high. Since the 9390 will
discipline the FRK, the C-field adjustment of the FRK doesn't really
On 5/29/2013 4:27 AM, Mark C. Stephens wrote:
Well, what do you know, I turned it up on its end with the heatsink end on a
heatsink and overnight it locked dead on 10Mhz.
Well as far as I can go, 10Mhz exactly, to 10 digits.
Do you mean you didn't have a heatsink on it before? That would be
want it in my rack :)
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Thursday, 30 May 2013 1:47 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/29/2013 4:27 AM, Mark C. Stephens wrote
On 5/29/2013 9:58 AM, Mark C. Stephens wrote:
Uh, well. No one told me about the heatsink thing :)
Section 2 in the manual talks about mounting and heatsinking. You mean
you didn't read the flippin' manual??? ;) Anyway, it's good that you
were able to get it on frequency.
I am using a
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Thursday, 30 May 2013 3:31 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/29/2013 9:58 AM, Mark C. Stephens wrote:
Uh, well. No one told me about the heatsink thing
there
won't be a frequency difference. That's what a GPSDO does.
Ed
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Thursday, 30 May 2013 3:31 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
Ed and Bob,
The FRK has settled down to 0.03Hz out after 2 days undisturbed (back in its
black box).
Allan deviation @ 800 seconds is 4.88E-12 which I am not terribly happy about.
-mark
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe,
The frequency offset of 3e-9 is still very high. Since the 9390 will
discipline the FRK, the C-field adjustment of the FRK doesn't really
matter. Before you open up the FRK again, see if the C-field can change
the frequency. If it can, and if the range is similar to the specified
range,
Mark,
I have some good news. I decided to copy your test by powering up an
FRK that's been sitting in a box for over a year. Once it locked, I
measured the frequency and was surprised to find that it was about .06
Hz (6e-9) low. I added about 890 ohms between the two external
frequency
Of Ed Palmer
Sent: Monday, 27 May 2013 1:33 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 9390 GPS RX
On 5/26/2013 8:24 PM, Mark C. Stephens wrote:
Ed, I'd unplugged the Rb from the counter and into the timer for measurement.
During this time it had dropped
1:33 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 9390 GPS RX
On 5/26/2013 8:24 PM, Mark C. Stephens wrote:
Ed, I'd unplugged the Rb from the counter and into the timer for measurement.
During this time it had dropped out of lock again.
That's why
-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Monday, 27 May 2013 1:33 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 9390 GPS RX
On 5/26/2013 8:24 PM, Mark C. Stephens wrote:
Ed, I'd unplugged the Rb from the counter
with the family too!
-marks
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Sunday, 26 May 2013 7:54 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/25/2013 12:43 AM, Mark C. Stephens wrote:
Hey Ed
...@febo.com] On Behalf
Of Ed Palmer
Sent: Monday, 27 May 2013 12:41 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
Those readings look more like an OCXO than an Rb standard. Does it's behaviour
as it locks match what I described earlier? You might also have your 5370
counter
On 5/26/2013 8:24 PM, Mark C. Stephens wrote:
Ed, I'd unplugged the Rb from the counter and into the timer for measurement.
During this time it had dropped out of lock again.
That's why the Allan Deviation is so bad, it was sweeping.
But I didn't realise as there was no counter attached!
I
-nuts-boun...@febo.com] On
Behalf Of Ed Palmer
Sent: Friday, 24 May 2013 4:03 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
Hold on mate! You're not quite done yet. :)
You said you tweaked the cap to get the Control Voltage to 8 volts and saw
the proper frequency. You
...@febo.com] On Behalf
Of Ed Palmer
Sent: Friday, 24 May 2013 4:03 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
Hold on mate! You're not quite done yet. :)
You said you tweaked the cap to get the Control Voltage to 8 volts and saw the
proper frequency. You should be able to move
checks for spectral purity and drift before I install the
9390's Ball back in.
Good stuff mate :)
-marki
-Original Message-
From: Mark C. Stephens
Sent: Friday, 24 May 2013 10:37 AM
To: time-nuts@febo.com
Subject: RE: [time-nuts] 9390 GPS RX
Ed,
I nailed it, R7 2M ohm, a crappy old
I have owned a similar 9390-5588A with the FRK Rb inside for a few
years now. Although the Rb is quite old, the unit locks in just 3
minutes and finds the GPS time (off by 1024 weeks, 16 sec, UTC) in
four minutes and displays an initial PDOP 03. I have reset the time
to the correct UTC time but
, 23 May 2013 5:19 AM
To: Time-Nuts
Subject: Re: [time-nuts] 9390 GPS RX
I am sure someone brought this up already, you appear to be seeing the
rubidium attempting to lock. The sweeping is the oscillators attempt to find
the Rubidium Resonance. It should lock in 15-20 minutes.
Thomas Knox
attached to this 9390 :p
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Thursday, 23 May 2013 1:16 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
On 5/22/2013 4:58 AM, Mark C. Stephens wrote:
It's
without some of the abundant collective wisdom and
experience contained in the time-nuts members!
-marki
-Original Message-
From: Mark C. Stephens
Sent: Friday, 24 May 2013 2:01 AM
To: Discussion of precise time and frequency measurement
Subject: RE: [time-nuts] 9390 GPS RX
Ed,
Okay
measurement
Subject: Re: [time-nuts] 9390 GPS RX
Hey Ed, Well I have its Ball (just one? ;) Efratom out on the bench.
Seems they built this stuff to service, huh? Nice.
I managed to make a mating connector out of 2.54mm pitch header strip as per
your suggestion.
Whew, that was my biggest concern
in the time-nuts members!
-marki
-Original Message-
From: Mark C. Stephens
Sent: Friday, 24 May 2013 2:01 AM
To: Discussion of precise time and frequency measurement
Subject: RE: [time-nuts] 9390 GPS RX
Ed,
Okay, Lying there I couldn't stop thinking about its lone Ball.
So I setup
time and frequency measurement
Subject: Re: [time-nuts] 9390 GPS RX
Hey Ed, Well I have its Ball (just one? ;) Efratom out on the bench.
Seems they built this stuff to service, huh? Nice.
I managed to make a mating connector out of 2.54mm pitch header strip as per
your suggestion.
Whew
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Ed Palmer
Sent: Friday, 24 May 2013 5:02 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
I applaud your enthusiasm, but Slow Down! Don't go randomly trying things.
The more you touch, the more you
and I! :)
I want to do some checks for spectral purity and drift before I install the
9390's Ball back in.
Good stuff mate :)
-marki
-Original Message-
From: Mark C. Stephens
Sent: Friday, 24 May 2013 10:37 AM
To: time-nuts@febo.com
Subject: RE: [time-nuts] 9390 GPS RX
Ed,
I nailed
Just a Follow up,
I checked the 10 Mhz output of the 9390 and it was... ~12 MHz.
Uhuh, Wiggling some cables I came across one that when pressure was put on it,
the frequency dropped back to 10Mhz.
The was J9 on the main (logic?) board.
Now I need to mention this particular 9390 has a separate
In a message dated 22/05/2013 09:32:33 GMT Daylight Time,
ma...@non-stop.com.au writes:
Just a Follow up,
I checked the 10 Mhz output of the 9390 and it was... ~12 MHz.
Uhuh, Wiggling some cables I came across one that when pressure was put on
it, the frequency dropped back to 10Mhz.
So
Mark,
What is the full model number (from label on rear)? It will be 9390-.
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark C. Stephens
Sent: 22 May 2013 07:56
To: time-nuts@febo.com
Subject: Re: [time-nuts] 9390 GPS RX
Hi Mark,
Just a Follow up,
[..]
Bah, I just noticed the GPS day is wrong, I think we are ~142 but its
saying 278, Is that a GPS receiver bug?
If it gives the correct time, it is very likely it is 1024 weeks off.
Check what (today - 1024*weeks) gives you in day of year.
--
Björn
...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Rob Kimberley
Sent: Wednesday, 22 May 2013 7:16 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 9390 GPS RX
Mark,
What is the full model number (from label on rear)? It will be 9390-.
Rob
On 5/22/2013 4:58 AM, Mark C. Stephens wrote:
It's a 9390-55024
I have plugged my counter into the Efratom rubidium oscillator thing and
disconnected the EFC.
It is actually wobbling ~ +/-650Hz, peaking as much as +/- 1KHz.
So, hazarding a guess, something is very wrong inside the black box
wish
they were.
From: ma...@non-stop.com.au
To: time-nuts@febo.com
Date: Wed, 22 May 2013 10:58:08 +
Subject: Re: [time-nuts] 9390 GPS RX
It's a 9390-55024
I have plugged my counter into the Efratom rubidium oscillator thing and
disconnected the EFC.
It is actually wobbling
Hello Fellow time nuts,
I received a Datum 9390 GPS receiver I bought off eBay today. It had a PSU
fault and I am running it off a bench supply until I can get the PSU working
again. All the PSU does is supplies 28V so I can probably adopt a more recent
supply to fit if I can't fix the old
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