Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Tom Van Baak writes:
Don't forget that a PRS10 Rb from eBay and a Oncore M12+T from
synergy-gps.com would be both cheaper and more stable.
Why would it be cheaper than building Brook Shera's unit? You still need
all the same electronics, but
Why would it be cheaper than building Brook Shera's unit? You still need
all the same electronics, but a more expensive oscillator (I assume the
PRS10 is going to cost more than an HP 18011A.)
The data sheet for the PRS10 is at:
http://www.thinksrs.com/products/PRS10.htm
Hi Tom:
Don't forget that SRS has the free PC program Rbmon that talks to the
PRS10, although it's listed with a different Rb product.
73,
Brooke
Tom Van Baak wrote:
Why would it be cheaper than building Brook Shera's unit? You still need
all the same electronics, but a more expensive
The SRS is actually looking more and more attractive I must say, mainly
because of its size (the Z3801A is not small), and the long holdover
period if I can't get a GPS signal - which is quite likely.
I'm tempted to take this in stages, using a reasonably large box, giving
room for a number of
Hi David:
How accurate is the pendulum clock now? How accurate do you want it to be?
Have Fun,
Brooke
Dr. David Kirkby wrote:
The SRS is actually looking more and more attractive I must say,
mainly because of its size (the Z3801A is not small), and the long
holdover period if I can't get a GPS
Again, I am not sure what your objective is with regards to phase noise
performance, but, remember that within the loops BW you will get the phase
noise of the source. In this case the GPS. The phase noise spectral density
will be modified by the loop's roll-off and then outside of the loop it
Hi David,
Apparently the GPIB fix occurred in the
5370B models only and as far as he knows, there
could be some units out there with bad firmware
in them and some with the GPIB fix. The problem
still remains where they didn't change the firmware
revision number so there's no way to confirm it
Hi Jim
I'm wondering that if we were to find an example of a known good unit as well
as a bad one, that we could look at the EPROMS to determine any defenses and
then clone the good ones. That would be one way to save David if he gets a
bad one.
Daun
-Original Message-
From: [EMAIL
The pendulum clock was what got me started on this, but I do have other
test equipment, including a microwave counter, which could do with a
decent reference
Brooke Clarke wrote:
Hi David:
How accurate is the pendulum clock now? How accurate do you want it to be?
Have Fun,
Brooke
Dr. David
I remember back when the 5370B was being designed that
there were three vendors who made GP-IB interface chips.
All three were implemented incorrectly resulting in bugs,
but the bugs were different. All three vendors refused
to fix the bugs. There was also an HP made PHI chip
that interfaced
Gee, now you've got me wondering. I remember we used the TI chip for some
things and Motorola for some others, but don't remember who the other was.
Wasn't the Phi chip the HP version? I also remember that the HP 9825 was the
standard by which all other 488 devices were compared. If it worked
Hi Rick:
I remember that when the Motorola 6800 first came out (my first computer
was a SWTP 6800 based kit) there were a family of 68xxx chips to go with
it and one of them was the 68488. But very shortly after that it was
common knowledge that there was a problem with it and almost no one
On Apr 26, 2005, at 7:55 PM, David Kirkby wrote:
Just interested how much people have paid for them. At the minute
there are several on eBay at $475 from the one seller. Is that a
typical price, or am I likely to do a bit better than that if I wait?
It's probably reasonable. It's not a steal.
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