If your 9390 comes up with the correct date by itself, it is Y2k OK.
Be sure to check whether it is set for UTC or GPS time.
Doug
At 06:16 PM 3/6/2006, you wrote:
>I just purchased a Datum 9390 off EBay. The seller is warning me
>that she was told that the 9390's need some sort of up
John: I also recently acquired a GPS-DC on eBay and have it working.
The XL-DC manual at this link:
http://www.symmetricom.com/support/download_manual.aspx?DocID=463
is very close to the GPS DC.
You can use the Function 04 on the front panel to configure the RS232 port.
Mine is set to
Brooke, don't know if this will be of any help as you're looking at your
4060 (and it may or may not be of any interest to the group as a whole)
but I'm about 15 days into what I hope will be long-term monitoring of
my two 5061As and one 5065A against GPS.
I'm using a setup that should be parti
At 7:58 PM -0800 3/6/06, Tom Van Baak wrote:
>> of things. But there are places with more water in the air than
>> Boston, as has been pointed out. I think Seattle may qualify from
>> time to time.
>
>There are many ways to measure rainfall but the most
>basic statistic will surprise you: the av
I had to look for that info:
Here we go, this chart
http://www.met.utah.edu/jhorel/html/wx/climate/normrain.html says
Pensacola (40 miles to my west) gets 62 inches annualy.
Surprisingly (to me), the land record (excluding the Pacific islands)
goes to Yakuta, AK with 151"!!!
No GPS controlled t
> of things. But there are places with more water in the air than
> Boston, as has been pointed out. I think Seattle may qualify from
> time to time.
There are many ways to measure rainfall but the most
basic statistic will surprise you: the average annual rainfall
in Seattle is about 36 inches
Na, rain drops in Seattle are usually small, compared to these big
buckets we get down here in Florida :-)
Not unusual to see 3 to 6 inches/hour of rain over a short period of time.
That's the way it feels too if you are out when it happens...
Didier KO4BB
David Forbes wrote:
>Google led me to
I think the problem with rain is not the effect on the direct signal,
which is negligible as your calculation showed, but the effect of
multipath.
Is a rain cloud is nearby, it could reflect signals with significant
strength, causing multiple receptions at your location, with signals
that may
I just purchased a Datum 9390 off EBay. The seller is warning me that she was
told that the 9390's need some sort of update w/r/t Y2K in order for it to
operate. The seller states (and the pticures show) that the unit responds Self
Test OK during power on.
The seller is giving me the right to
hopefully somebody on this list has a TrueTime GPS-DC ...
I've just set up my new (to me) GPS-DC MK III. It seems to be working
(gets a fix, show itself as locked and the stats look fine). The 1PPS
output works and is currently syncing one of my NTP boxes. However I
can't get the RS232 outpu
Google led me to a paper written 10 years ago at by some folks at
Lincoln Labs that determined the GPS-rain delay value experimentally.
The paper is at
http://gauss.gge.unb.ca/papers.pdf/ion96am.anthea.pdf
and the results are up to 300 mm of delay to a GPS signal caused by
rain at MIT Haystack
Tom Clark, K3IO (ex W3IWI) wrote:
> David,
>
> Maybe we can figure this out. First, the refractive
> index of water is about 1.3. So I think this means
> the propagation speed of radio waves in water is
> down to about 0.75 c, right?
1.3 is about right in the optical region, but I believe the ef
hi im new to this
i downloaded the digests and i am trying to browns them
i have one question first
i am trying to build a simple gps pll'd ocxo and i want to make shure that
when i loose gps signal the vco signal to the ocxo switch to an manuel mode
or the last vco voltage
my first thogt was a
[EMAIL PROTECTED] wrote:
David and Tom opined:
Rain should have an effect on the timing of the signal, since the
propagation speed of radio waves through water is different from that
through air. It will also attenuate the signal, causing worse S/N
ratio which would cause the lower-eleva
Hi Gar:
Interesting. I just tried a 30 minute power down, and again the ALIGN
light in on. So I guess it's an overnight power down to get it reset.
More tomorrow,
Brooke
NE8S wrote:
>Brooke,
>
>Now that you mention it, I did power down at first for 45 minutes. After
>this initial power-up
Brooke,
Now that you mention it, I did power down at first for 45 minutes. After
this initial power-up sequence, the same prevailed. I then decided on the 24
hour down period for the oscillator and cesium ovens to fully recycle.
Gar
- Original Message -
From: "Brooke Clarke" <[EMAIL P
Hi Gar:
OK. It's time to pull the plug and leave it out for awhile.
I tried pulling the plug for 10 seconds, but that may not have been long
enough to get the oven cooled down.
More later,
Brooke
NE8S wrote:
>Brooke,
>
>One of my FTS4060's behaved the same way during a power interrupt. It wa
Brooke,
One of my FTS4060's behaved the same way during a power interrupt. It was
the only one that was not on a UPS. After many attempts to reset the logic
while powered up, I finally brought the clock down and 24 hours later,
powered it back up again. As a result, it performed its normal powe
Hi Tom:
I think the problem is related to the FTS4060. During the brown out my
computer and the SR620 counter reset, but the two green LEDs on the 4060
stayed on, at the time my thought was "cool". But the yellow "Align"
light behind the door has turned on and so far I have not been able to
Brooke,
Nothing here.
Rob K
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Brooke Clarke
Sent: 06 March 2006 03:07
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Austron 1290A Manual Wanted
Hi:
An Austron 1290A backup p
> Rain should have an effect on the timing of the signal, since the
> propagation speed of radio waves through water is different from that
> through air. It will also attenuate the signal, causing worse S/N
> ratio which would cause the lower-elevation satellites to not be seen.
David,
Maybe
Brooke,
Will check and get back to you.
Rob K
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Brooke Clarke
Sent: 06 March 2006 03:07
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Austron 1290A Manual Wanted
Hi:
An Aust
> Rain should have an effect on the timing of the signal, since the
> propagation speed of radio waves through water is different from that
> through air. It will also attenuate the signal, causing worse S/N
> ratio which would cause the lower-elevation satellites to not be seen.
That's what I wo
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