Sorry for the newbie question, but with two Z3801A's, what use would I
find for a rubidium unit? I see lots of them on ebay from the Chinese
sellers.
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Sorry for the newbie question, but with two Z3801A's, what use would I
find for a rubidium unit? I see lots of them on ebay from the Chinese
sellers.
Better holdover for when your antenna gets zapped by lightning. :)
That probably assumes your Z3801As are running off a UPS and that you have
Considering that the GPS antenna is presently mounted inside, if I get
a lightning strike on it, I've got real problems :-)
On Mon, Oct 5, 2009 at 1:27 AM, Hal Murray hmur...@megapathdsl.net wrote:
Sorry for the newbie question, but with two Z3801A's, what use would I
find for a rubidium unit?
, October 05, 2009 2:09 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Why would I want a rubidium
Sorry for the newbie question, but with two Z3801A's, what use would I find
for a rubidium unit? I see lots of them on ebay from the Chinese sellers
[mailto:time-nuts-boun...@febo.com] On
Behalf Of Joseph Gray
Sent: Monday, October 05, 2009 2:09 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Why would I want a rubidium
Sorry for the newbie question, but with two Z3801A's, what use would I
find
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Why would I want a rubidium
Sorry for the newbie question, but with two Z3801A's, what use would I
find
for a rubidium unit? I see lots of them on ebay from the Chinese sellers
and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Why would I want a rubidium
I know I don't need any of this stuff. I was just wondering what I
could do with a rubidium vs what I already have.
On Mon, Oct 5, 2009 at 10:58 AM, J. Forster j...@quik.com wrote:
From
Here's a reason why you might want (as opposed to need!) another
standard beyond the GPSDO.
An Rb or Cs is self-contained. The GPSDO relies on an external factor,
the presence of GPS. Holdover mode may be good to keep thing close for
a while, but over the long term the GPSDO without GPS is
Thanks, John. That was the type of information I was looking for.
Joe Gray
KA5ZEC
On Mon, Oct 5, 2009 at 11:34 AM, John Ackermann N8UR j...@febo.com wrote:
Here's a reason why you might want (as opposed to need!) another
standard beyond the GPSDO.
An Rb or Cs is self-contained. The GPSDO
I know I don't need any of this stuff. I was just wondering what I
could do with a rubidium vs what I already have.
Get one and try to compare it to your GPSDO.
Then you will have a good excuse to get better test gear.
--
These are my opinions, not necessarily my employer's. I hate spam.
A GOOD crystal oscillator will stay w/in parts in 10E10 for days at least.
And I don't mean a DO. Just run it with a continuous comparison to LORAN
or WWVB or GPS and MANUALLY tweek it as needed. A benefit is that you KNOW
when you made an adjustment and not have to worry about random changes
from
I neglected to mention there are very, very good reasons to have a single
master frequency standard and distribution amp for a lab. IMO, that is far
more important than the standard's absolute accuracy.
-John
==
A GOOD crystal oscillator will stay w/in parts in 10E10 for days at least.
In message 1406.12.6.201.38.1254771700.squir...@popacctsnew.quik.com, J. For
ster writes:
I neglected to mention there are very, very good reasons to have a single
master frequency standard and distribution amp for a lab. IMO, that is far
more important than the standard's absolute accuracy.
You
I have a pair of good quartz oscillators, an HP and an Oscilloquartz. They
are compared to each other w/ a Tracor Frequency Difference Meter. The HP
Oscillator drives an HP Distribution amp and thence other things,
including an Austron LORAN. I have but to look at the LORAN occasiuonally
to see
In message 1406.12.6.201.38.1254771700.squir...@popacctsnew.quik.com,
J. For
ster writes:
I neglected to mention there are very, very good reasons to have a single
master frequency standard and distribution amp for a lab. IMO, that is
far
more important than the standard's absolute accuracy.
On Mon, Oct 05, 2009 at 12:35:17PM -0700, J. Forster wrote:
My main gripe w/ Rb and especially Cs is they have very limited lives.
IMO, it's just not worth paying extra money for stability I don't need. If
I ever do need their capabilities, there are several on the shelf, but
until then they
I know I don't need any of this stuff. I was just wondering what I
could do with a rubidium vs what I already have.
Get one and try to compare it to your GPSDO.
Then you will have a good excuse to get better test gear.
Hal,
I like the way you think :-) Actually, I am very slowly
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