alanh...@gmail.com wrote:
My 5334A Service Manual for SERIAL NUMBER PREFIX: 2426A lists the following
battery;
Reference Designation - BT1
HP Part Number - 1420-0268
Description - Battery 3.6V .065A-HR NI-CD
Mfr Code - 28480 (which is Hewlett-Packard)
Mfr Part Number - 1420-0268
I haven't
Ken,
You can find the complete M12+ User's Guide here:
http://www.synergy-gps.com/index.php?option=com_contenttask=viewid=35;
Itemid=60
M12+ board layout is shown on page 17 and pin-outs are shown on page 18.
Technical data on other Motorola legacy GPS receivers is at the same
location. We'll
Interesting. I wonder what other GPSDO units are out there in the cell systems
which might find their way to the surplus market?
By the way, how do you get Lady Heather to show the plot of signal strength vs
az/el? I tried all sorts of different graphing options and read through
everything
Peter,
You can display signal strength vs az/el by pressing the letters s a s on
your keyboard.
S = Survey
A = Antenna
S = Signals
Sam.
- Original Message -
From: Peter Gottlieb
[mailto:n...@verizon.net]
To: Discussion of precise time and frequency
measurement
Hi T-Nuts
I have a question about the Cabledelay in LH
I have a tbolt in my home (approx 25m cable , and 100nS delay) and one
in my summerhouse (approx 15m cable , 66nS delay).
I just discovered that i have specified a negative cabledelay of -66nS in
my summerhouse , and i think it's wrong.
Thank you!!!
On 5/3/2012 10:32 AM, Sam wrote:
Peter,
You can display signal strength vs az/el by pressing the letters s a s on
your keyboard.
S = Survey
A = Antenna
S = Signals
Sam.
- Original Message -
From: Peter Gottlieb
[mailto:n...@verizon.net]
To: Discussion of precise
The best way is to buy a rechargeable cell pack for cordless phones. These are
typically made with 3 small NiCad so that they don't mind trickle charging and
are already safely packaged in shrink tubing with two leads and a connector.
When the local Lowe's went out of the phone distribution
Hi:
Shelf life is the key spec for memory backup batteries. The worst possible type are rechargeable which go dead in a few
months.
Next best are primary batteries where Alkaline (a few years) is good, but newer chemistries like Lithium primary have
10 year shelf life.
So a computer memory
Most GPS receivers have cable delay and user delay but, in the end, the
delay is one action and the receiver can anticipate/posticipate the PPS
where you want it to be. The cable delay is positive but the receiver has
to put the PPS out early to account for the cable.
On Thu, May 3, 2012 at 4:34
The documentation says that you should use negative values to compensate for
the cable delay, but all of my units were removed from service with positive
or zero delays set. Lady Heather sort of assumes positive values, but you can
enter negative ones. Which is correct remains a mystery
Hi
Quick check:
1) Fire up two TBolts, hook up a scope between the PPS's (trigger on A,
watch B)
2) Change the antenna delay by +500 ns on B (needs to be N x 100 ns).
3) Pulse moves early or late . If it moves early then it's compensating for
500 ns of cable delay.
Bob
-Original
Key here is if battery is ni-cd it implies a charging circuit and using
alkaline or lithium batteries may explode If charged
On the hp instruments which I have rehabbed from that era most of them used
nicads with a charger circuit so best advice is replace like with like
Sent from my iPhone
Exactly. The best is to test. I like the uBlox LEA-5T user delay to place
the PPS where I want. Useful for our TICs (including in the list the
HP5370A, the E1740A and the GT4000) that usually wrap around the second
when the PPS under test slides under the reference.
On Thu, May 3, 2012 at 7:59
Thanks to all that replied to my questions.
I have been off doing the suggestions offered and have found out some
interesting
things about my unit.
Found out that the unit I have does not allow for certain parameters to be
changed using
the command line. Argh Called SRS and talked with a
Mark,
I agree with you. I've been using an NTGS50AA here for some time, and it is
an excellent unit with none of the thermal problems of the Tbolt. Easily as
good as the old Z3801A, and much lower power consumption. I use the NTGS50AA
with the Thunderbolt software in TSIP mode, although not
While I've not tried the recently suggested method for making it talk to
LH,
I did find another crude way that works. If you get it talking to TBOLTMON
or some similar software via the front panel, you can use LH on another
computer on the rear-panel monitor port to monitor what comes back,
On May 3, 2012, at 1:18 PM, Murray Greenman wrote:
I agree with you. I've been using an NTGS50AA here for some time, and it is
an excellent unit with none of the thermal problems of the Tbolt. Easily as
good as the old Z3801A, and much lower power consumption. I use the NTGS50AA
with the
John,
Good stuff. Excellent news.
You will be very impressed with the performance of the NTGS50AA.
If you have any questions, or need real Trimble software to test it with,
let me know. I did some spying on the comms using the Trimble software, but
it was very difficult. TSIP is not a
John Miles wrote:
While I've not tried the recently suggested method for making it talk to
LH,
I did find another crude way that works. If you get it talking to TBOLTMON
or some similar software via the front panel, you can use LH on another
computer on the rear-panel monitor port to
Did the seller double the shipping cost today? I could have sworn it was $30
the
last time I looked at the listing.
Steve
On May 3, 2012, at 2:42 PM, John Miles jmi...@pop.net wrote:
While I've not tried the recently suggested method for making it talk to
LH,
I did find another crude
I just bought one of these. I was /really/ annoyed when I go to pay to
find out that he has doubled the shipping fee since earlier this morning
from $30 to $60.
I'm not a happy camper...
Dan
___
time-nuts mailing list -- time-nuts@febo.com
To
On May 3, 2012, at 2:08 PM, Steve wrote:
Did the seller double the shipping cost today? I could have sworn it was $30
the
last time I looked at the listing.
I paid $30 shipping early today.
Kevin
___
time-nuts mailing list -- time-nuts@febo.com
On 5/3/2012 1:08 PM, Steve wrote:
Did the seller double the shipping cost today? I could have sworn it was $30 the
last time I looked at the listing.
Steve
Yes, he did. Unfortunately I didn't check since I still had the page
open from earlier, and didn't find out till I went to Paypal...
nimh would be the more modern battery that should work in the nicd charge
circuit.
The HP circuits usually were pretty simple actually.
Regards
Paul
On Thu, May 3, 2012 at 2:11 PM, Scott McGrath scmcgr...@gmail.com wrote:
Key here is if battery is ni-cd it implies a charging circuit and using
On 5/3/2012 4:16 PM, Dan Rae wrote:
Yes, he did. Unfortunately I didn't check since I still had the page
open from earlier, and didn't find out till I went to Paypal...
He certainly isn't getting positive feedback from me.
You'd let your own oversight affect the feedback you leave? It's not
It seems these sellers can at least do a go/no-go test. Sure they can't
quantify the products, but they can qualify them.
So you just get the PCB and no case?
I'm just irked that nowadays all these units are from China. If you
wizards want to do an open source gpsdo, count me in.
A bit OT,
Guess I waited too long to order. $60 for shipping - I'll pass.
Steve
On May 3, 2012, at 3:16 PM, Dan Rae dan...@verizon.net wrote:
On 5/3/2012 1:08 PM, Steve wrote:
Did the seller double the shipping cost today? I could have sworn it was $30
the
last time I looked at the listing.
Well $60 or not he seems to be out of them.
Hey they see a trend they take advantage thats what epays about.
For the fun of it I did ring a telco surplus parts outfit. As many as you
need at $300. :-)
But they would come from the US and the shipping was cheap.
Regards
Paul.
On Thu, May 3, 2012 at
I read somewhere that NiMH batteries do not like float charging. You might
do some research on that.
What I do is disable the charge circuit and install a Tadiran Li 3.6 volt
cell. You keep the diode to isolate the Li cell from the normal 5 volts.
These things will last 20 years and they
Tom would agree in general. The charge circuits actually poor. Typically a
resistor.
But here is the other aspect I have run into. The old memories sucked some
real current and would truly drain a LI in 3 months or so. I actually now
measure the draw to understand what I am dealing with. Can I get
Well, I don't understand well what is happening. Unless I am totally
wrong and bought a piece of crap, I still see $25 as the standard
international shipping. I just bought one.
Ignacio, EB4APL
On 03/05/2012 22:33, Steve wrote:
Guess I waited too long to order. $60 for shipping - I'll
If you are going to use a Nimh battery go the rest of the way and use a charge
controller chip better than a small class d fire
Sent from my iPhone
On May 3, 2012, at 4:53 PM, paul swed paulsw...@gmail.com wrote:
Paul.
___
time-nuts mailing list
I have two HP 8116A function generators of widely different manufacturing date
and different processor board. Both have a NiCad for memory backup.
On the old one, the battery was completely gone and so were many of the traces
on the PWB.
After all was repaired and the battery replaced with a
gary lists at lazygranch.com
I'm just irked that nowadays all these units are from China.
It has been the same way with the Thunderbolts as well. The various
Chinese sellers have all raised their prices (in unison) for just the
Thunderbolt to $249. Interestingly there are a couple of sellers
There is a feedback rating for shipping cost. A $60 charge to ship a
PCB would rate the lowest score in that area from me, even if I did
purchase one (which I didn't due to seeing that change). And that
isn't retaliation, that is honesty, and no, the seller wouldn't get a
chance
There are/were two listings for what looks like about the same thing.
fluke.l is/was selling one with $25.00 shipping, but the markings on the
oscillator case look like 34310-0 or O whereas the other listing showed a
34310-T2 oscillator if I remember correctly. I also see some 34310-T bare
This is pretty think, but interesting:
http://tf.nist.gov/sim/Papers/Trigo_CPEM_2010.pdf
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be
OK, I've read the paper. Why not GPSDiscipline your Rb? GPSDiscipline cum
grano salis but do it. My LPFRS GPS disciplinator hardware is ready. OK, I
know, the 1E-11 step is too large but I'll try. First I'll take
measurements so that I can think about a disciplining algorithm. Then a
hardware
At the risk of over simplifying it: Doesn't it all always depend on the loop
BW you pick?
Inside the loop BW you see the noise of the loop's reference. Outside the
loop BW you see the free running noise of the oscillator.
At and around the loop's corner frequency you see a combination of both.
And maybe the problem is worse: I want also to keep aligned the PPS. To
recover the PPS position (without phase jumps) it is mandatory to slightly
force the 10MHz. Better start the machine and take measures...
On Fri, May 4, 2012 at 12:20 AM, Brian, WA1ZMS wa1...@att.net wrote:
At the risk of
Thanks all for the advices, by which I'm now oriented towards a cordless phone
battery pack.
Antonio I8IOV
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the
Hi
If you dig into commercial GPSDRb's their loop time constants are *very* long.
They crank out to a couple days fairly quickly. In addition they (like a lot of
GPSDO's) have lowpass filters in the loop in addition to the basic PLL / FLL
structure.
Bob
On May 3, 2012, at 6:30 PM, Azelio
All good points, and all very true.
I often remind myself of how over simplified sometimes people view things.
Case in point:
I once had a high level manager hold an all employee meeting in which he
started his talk by saying that
Nothing difficult is ever easy. Needless to say...he didn't
Hi Didier:
HP went to super caps for memory backup in their RMB computers. When a new computer arrived it knew the date and time
and if plugged in never lost it.
When stored for a few months the super cap would drain, but no harm done, just
reset the date - time on power up.
Ni-Cad is very
On Thu, May 3, 2012 at 5:01 PM, Brian, WA1ZMS wa1...@att.net wrote:
I once had a high level manager hold an all employee meeting in which he
started his talk by saying that
Nothing difficult is ever easy. Needless to say...he didn't last
long in his job and left the company.
Yes but
Mark,
I suggest that the Thunderbolt E is significantly better than the original
Thunderbolt. The Thunderbolt E has 12 channels, is more sensitive, and is
more stable. The double-oven OCXO appears to be immune to ambient
temperature changes. It also requires only 24 VDC to operate. Compared
I bought 3, NTGS50AA from fluke.l, a few months ago after I sussed out how to
get Lady Heather talking to my first one. (to beat the rush and price inflation
that this would probably cause..)
Of my 3 units 2 are T2 the other is T. The Nortel design spec states:
Oscillator XXX will identify
On May 3, 2012, at 7:21 PM, Sam wrote:
Kevin, you asked if there was a PPS output. There isn't a 1PPS output at all,
but there is a Even Second output with a negative pulse, 40-60 ns wide.
This is available via the font mounted SMB connector or via the rear 110-pin
AMP Z-pack connector.
I bought one this morning when the shipping was $30. Since I was out
for the day, I didn't have a chance to pay for it until this evening.
The shipping charge was not changed. Apparently, it is calculated and
frozen by ebay at the time of purchase.
My guess is that he couldn't raise the
http://pages.ebay.com/sellerinformation/news/Feecalculator.html
For Joe Pocketprotector, the fee on the item and shipping is the same.
However, for Joe Pileofcrap that has a basic store, the fee on the item
is double the fee on the shipping, so jacking up the shipping cost is a
way of making
Kevin,
No, I've not found a 1PPS output. Not that I've looked, and I don't have the
official pinouts for the big connector on the back. It would be easy enough
to synthesize one, for example using a divider on one of the other products,
resetting it if necessary with the 1PPS2 (2 sec) pulse.
If you wanted to drive a Quartz clock directly from the GPSTM you could
consider dividing the 9.8304 MHz output by 300 somehow.
One of the things I did consider was driving the motor of a Quartz clock
directly from the 1PPS2 signal.
73,
Murray ZL1BPU
52 matches
Mail list logo
