Dave,
You could use a 120V relay and switch the high capacity battery from its own
charger to the battery pack in the UPS. When power comes back, the relay
automatically switches the battery out and back to its own charger.
Bob
>>> -Original Message-
>>> From: time-nuts
If anyone is interested, a Rohde & Schwarz GPSDO:
Rohde & Schwarz GPS RECEIVER ED170MP MEINBERG 2105.5504.00
http://www.ebay.com/itm/262081245211?_trksid=p2055119.m1438.l2649
=STRK%3AMEBIDX%3AIT
___
time-nuts mailing list --
Not sure if this is the same problem but my Z3801 seems to have the same
problem. It doesn't run long due to the 10811 crapping out after a hour,
but even leaving it on, the date never seems to update. It's stuck
somewhere around 1996 (wild guess).
Bob
>>> -Original Message-
>>> From:
>>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of James
>>> Flynn
>>> Sent: Friday, September 25, 2015 10:40 AM
>>> To: time-nuts@febo.com
>>> Subject: Re: [time-nuts] Z380XA The saga of the aging 10811
>>>
>>> Bob Benwa
t;>> 6 months prior to being hooked to the GPSDO...)
>>>
>>>
>>>
>>> Dan
>>>
>>>
>>> On 9/23/2015 3:10 AM, time-nuts-requ...@febo.com wrote:
>>> > Date: Tue, 22 Sep 2015 23:49:25 -0400
>>> > From:
Hank,
Thank you! For some reason I don't have this email. I looked again, for
the fifth time, and it's just not there. It may be in my spam folder or my
email rules may have missed placed it.
I apologize Arthur if I have caused you any grief, and I thank you for your
informative discussion on
All,
I found my problem, or rather it went away. Even though I probed the base of
the connector with a scope, after jiggling the cable, the output came back.
Attached is an infinite persistence scope capture of my Z3805A (blue) vs the
Trimble board (yellow). Triggering on the Trimble, you
constantly causing a
>>> temperature channge in one direction.
>>>
>>> Robert G8RPI.
>>>
>>> On 9 September 2015 at 04:40, Bob Benward <rbenw...@verizon.net>
>>> wrote:
>>>
>>> > Hi Ed,
>>> > OK, a bad oven. I can b
Arthur,
I did read your posts before I composed my email. You made no mention of
getting the RS-232 to work, and you made no mention of the MACT switch.
Yours worked from the start. I am not having such good luck.
I got it to lock once, I notice the 1pps comes out almost immediately, even
after
Hi Arthur,
I looked at all your emails. This is the only reference to reading
something from inside the unit:
>"The one error I did notice is I said the board locked after it found
satellites but that is incorrect."
You have no other details on RS232 on the email of August 22 (I rec at
7:01pm
Hi All,
I finally hooked up my Trimble GPSDO today. I noticed it took a long time
to lock and then the 10MHz would not come out until it achieved lock. I hit
the reset switch and then it lost lock and surprisingly it takes forever to
lock up again. After cycling power, it did produce and
figure I got my money's worth from the Z3805 and my interest in time
nuts
>>> pursuits has waned in recent years.
>>>
>>> Also I seem to recall this Z3805 loosing GPS lock during a lightning
storm as
>>> well. (I recall some one else mentioned this issue with their Z
Hi Ed,
OK, a bad oven. I can buy that. But then if the oscillator is constantly
drifting, would that not imply that the oven is constantly changing
temperature, in one direction?
BTW, the curve is starting to flatten out. It might be flat before It gets
to 1000K counts.
Bob
>>> -Original
Hi All,
I would like to convey the saga of my Z3801A and my Z3805A.
I purchased a Z3801A a few years ago at the Dayton Hamfest. I got it
running and a few months later the unit lost it's GPS lock. I did some
trouble shooting and finally realized the unit ran out of EFC range. I
opened the
Can you communicate over RS232? Are you using the Z38xx software? What
does it say?
Bob
>>> -Original Message-
>>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark
>>> Spencer
>>> Sent: Tuesday, September 01, 2015 12:54 PM
>>> To: time-nuts@febo.com
>>> Subject:
So how does a frequency lock work? How is it implemented? Can someone sketch a
schematic?
And what equipment or technique is used to measure a 2hz error at 100GHz?
Bob
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Tim
Shoppa
Sent: Wednesday,
Attila,
I concur with you, what Azelio described is a standard off the shelf PLL.
An XOR for a Type I phase discriminator, characterized by a 90 degree phase
lock, and with more complicated logic, a Type II PLL which locks at zero
degrees. In a well designed loop, in both cases over the long term
Arthur,
You are correct, I missed that regulator, but may other Trimble oscillators
are powered by +12V. That's what led me down the wrong path. I still
suspect that it might have been designed for +12V, as +6.5V is not a common
supply rail.
I just got my Trimble board yesterday and hope to
Hi Angus,
Thanks for your reply. My original suspicion is the +6.5V rail. That needs
to come from somewhere, and you need headroom if it's an unregulated input.
Pumping 2A through a regulator like that is no easy feat. Although rated
for 3A, you need to keep the junction temperature below 125C.
Thank you all for your responses.
I tried to buy one of those adapters but I think there was a language
problem. Still waiting for a positive response from the seller.
It seems this guy is selling those small GPSDOs. The ones dated 2014-11-06
2014-12-09 are the Morion, the 2015-07-08
Hi all,
Does anyone have any information or experience with this small Trimble
GPSDO? There doesn't seem to be any associated model number other than the
model of the OCXO (63090). I am looking for software, command codes, or
hookup schematics, can anyone help?
To Hal Murray,
I checked my Z3801A and it was already set up for RS-232, regardless, I
finally figured out my problem. Running a Z3805A and a Z3801A side by side
can lead you down the rabbit hole. The Z3805A port settings are 9600,N,8,1
while the Z3801A uses an unusual 19200,O,7,1. It just
I am sure this has been covered, but I did have much luck in the archives.
I have an HP Z3805A with the nice faceplate and 6 leds on the front. I also
have a Z3801A also with 6 LEDs. What is the difference in the com ports?
The Z3805A works fine with a standard 25pin to 9 pin adapter. The
23 matches
Mail list logo
