On 14 Dec 2014 02:12, Adrian rfn...@arcor.de wrote:
Same here. I have a Z3805A from this vendor that works flawlessly, and I
know of other people that purchased from him without any problems.
To call it a cam when a HP unit comes with a remanufactured box is quite
a harsh statement, IMHO.
On 14 Dec 2014 08:07, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
If the boxes had Yixun Electronics or similar printed on the rear I
would not have a problem with him putting the electronics in new boxes,.
But clearly there is an attempt to deceive people
Both my computers run Solaris.
* One, a Sun Ultra 27 has a Xeon processor, no serial ports, but I do have
a good quality USB serial adapter for it.
* The other, a Sun Blade 2000, has a SPARC processor a 25 pin serial
port.
I am using the Sun Blade 2000 to talk to the HP now, but I don't run
On 14/12/2014 04:08, d...@irtelemetrics.com wrote:
Note that most high-end GNSS timing receivers go one better and
simply have an external input for the clock. That way you feed your
own lab clock into the receiver. If you have Rb/Cs/maser you would use
that as the reference. It's what the
Le 14 déc. 2014 à 10:02, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk a écrit :
Both my computers run Solaris.
* One, a Sun Ultra 27 has a Xeon processor, no serial ports, but I do have
a good quality USB serial adapter for it.
* The other, a Sun Blade 2000,
Hi all,
I've just found an old anti-theft system (I think) for cars . It has a tyco
electronics A1205 gps module.
I've been unable to find any information about this module, other than it
should be a 3.3V 12 channel GPS module with serial NMEA output.
Does anyone have any informations about it?
drkir...@kirkbymicrowave.co.uk said:
Can anyone advise if this is possible, and if so what software is needed?
Any idea what sort of accuracy would be achievable?
I'm not familiar with Solaris. I've never worked with a 58503A, but I have
worked with the Z3801A and KS-24361.
I'd try ntpd.
On Dec 13, 2014, at 9:47 PM, Chris Albertson albertson.ch...@gmail.com
wrote:
Actually I've added some features to it like a 2 line by 16 character LCD
display and some status LEDs. And I can log data to a computer via a USB
cable so it is easy to plot data and it is using my more
Based on my recent testing - including Solaris - you will be better off
with the Internet unless your USB adapter is far better behaved than the
several I have here
On Sunday, December 14, 2014, Hal Murray hmur...@megapathdsl.net wrote:
drkir...@kirkbymicrowave.co.uk javascript:; said:
Can
On 14 December 2014 at 11:57, Hal Murray hmur...@megapathdsl.net wrote:
drkir...@kirkbymicrowave.co.uk said:
Can anyone advise if this is possible, and if so what software is needed?
Any idea what sort of accuracy would be achievable?
I'm not familiar with Solaris. I've never worked with a
On Dec 14, 2014, at 07:42, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 14 December 2014 at 11:57, Hal Murray hmur...@megapathdsl.net
redacted
That command works.
How do you reboot - apart from of course powering the thing off?
# shutdown -y
On 14 December 2014 at 12:39, Neil Schroeder gign...@gmail.com wrote:
Based on my recent testing - including Solaris - you will be better off
with the Internet unless your USB adapter is far better behaved than the
several I have here
The USB - serial adapter I have is an Keyspan USA-19HS
On 14 December 2014 at 13:37, bownes bow...@gmail.com wrote:
On Dec 14, 2014, at 07:42, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 14 December 2014 at 11:57, Hal Murray hmur...@megapathdsl.net
redacted
That command works.
How do you reboot - apart
I haven't checked the pps either. But the reason to put the 15 Mhz into
standby is that they combine both signals in a resistive combiner and
distribute the signals to multiple radios.
If two were active it would create issues. This method avoids the gap
switch of a relay.
Regards
Paul
WB8TSL
On
Hi
The cell phone base only needs one reference to keep it running. They disable
the un-needed output to make it clear which one should be used. It’s a very
common thing in modern systems, not just telecom setups.
Bob
On Dec 13, 2014, at 11:55 PM, Hal Murray hmur...@megapathdsl.net wrote:
Hi
There is also a little note down in the (many) notes section:
Not all features are available with all firmware versions.
It applies to all of the external inputs (like USB and SPI).
Since the oscillator in the uBlox is a TCXO and not a VCTCXO, the aiding
feature would not help in the case
Hi
On Dec 14, 2014, at 6:03 AM, Francesco Messineo
francesco.messi...@gmail.com wrote:
Hi all,
I've just found an old anti-theft system (I think) for cars . It has a tyco
electronics A1205 gps module.
I've been unable to find any information about this module, other than it
should be a
Fellow time-nuts,
I have seen the long debate about the fake 58503s. Maybe we should take
a step back and think a little about that. Why does someone rebuild say
Z3801s into 58503s? Because somehow they are expected to have a higher
value, and therefore there is a profit to be made in doing
Hi
On Dec 14, 2014, at 12:47 AM, Chris Albertson albertson.ch...@gmail.com
wrote:
I tried to see just how simple, low cost and self contained I could make a
GPSDO. I started with the Lars Walenius design then removed everything I
could from it. I replace all the software with just a
The oscillator in he m8f is a vctcxo and can be steered with feedback or
controlled by the host.
Also the m8f can send compliant DAC words to a TLV8515 and and MCP part via
i2c for external
VCXOs. It accepts their return signal on what would normally be its
feedback in ports.
On Sunday,
Hi
On Dec 14, 2014, at 9:53 AM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Fellow time-nuts,
I have seen the long debate about the fake 58503s. Maybe we should take a
step back and think a little about that. Why does someone rebuild say Z3801s
into 58503s?
or convert 3805’s
On Dec 14, 2014, at 9:46 AM, Neil Schroeder gign...@gmail.com wrote:
The oscillator in he m8f is a vctcxo and can be steered with feedback or
controlled by the host.
Also the m8f can send compliant DAC words to a TLV8515 and and MCP part via
i2c for external
VCXOs. It accepts their
Hi
On Dec 14, 2014, at 8:38 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 14 December 2014 at 12:39, Neil Schroeder gign...@gmail.com wrote:
Based on my recent testing - including Solaris - you will be better off
with the Internet unless your USB
Hi,
I tested it...and could not get it to work. gpsd opens pps0 but strace
does not show me the regular ppsapi syscalls and also ppstest gives a
time out.
e.g. I did an strace and I did not see any PPS_FETCHs passing by.
I verified with lsof that gpsd does have pps0 open.
With help
Strongly agree with Bob. The neo 6 on ebay is a good example silly stupid
cheap!
Regards
Paul
WB8TSL
On Sun, Dec 14, 2014 at 9:46 AM, Bob Camp kb...@n1k.org wrote:
Hi
On Dec 14, 2014, at 6:03 AM, Francesco Messineo
francesco.messi...@gmail.com wrote:
Hi all,
I've just found an old
Hi Li Ang,
On 12/12/2014 04:40 PM, Li Ang wrote:
Hi Bob,
The job done by linear regression is to reduce the uncertainty. This
counter is designed to use continous timestamp method. My current design
can measure 9000 times/second. If I only use the 1st and last one to
calculate, it's the
Should have added. You get great documentation also and everything is well
established and most likely will handle some 1024 week rollovers.
The old stuff is quite annoying with respect to this.
Regards
Paul
WB8TSL
On Sun, Dec 14, 2014 at 11:05 AM, paul swed paulsw...@gmail.com wrote:
Strongly
Another Time-nut suggested the use of 10 baseT ethernet transformers for 10
MHz isolation that he pulls from old ethernet boards. The 20F001n. These
are available from UTSource on ebay at 90 cents each NOS. Ordered 20.
Well I have to say as a BPF or something for 10 Mhz they are lousy. BUT
then
On 12/12/2014 06:15 PM, Bob Camp wrote:
Hi
On Dec 12, 2014, at 11:44 AM, Li Ang lll...@gmail.com wrote:
Yes, you are right. 5650_5650 is sig=ref case. prs10_5650 is sig=prs10 and
ref=5650 case.
In the “both same (5650 / 5650) case” your linear regression filtering is
faking you out a
Hi
Maybe a bit more on a timing receiver:
GPS is (for some reason) better known for navigation than for timing. In
navigation the receiver moves around a lot. In most timing applications, the
receiver is stationary. When moving, the mathematical solution to the “where am
I / what time is it”
Hi
On Dec 14, 2014, at 11:36 AM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 12/12/2014 06:15 PM, Bob Camp wrote:
Hi
On Dec 12, 2014, at 11:44 AM, Li Ang lll...@gmail.com wrote:
Yes, you are right. 5650_5650 is sig=ref case. prs10_5650 is sig=prs10 and
ref=5650 case.
On Sun, Dec 14, 2014 at 3:46 PM, Bob Camp kb...@n1k.org wrote:
Hi
On Dec 14, 2014, at 6:03 AM, Francesco Messineo
francesco.messi...@gmail.com wrote:
Hi all,
I've just found an old anti-theft system (I think) for cars . It has a tyco
electronics A1205 gps module.
I've been unable
Hi Paul I confirm the 17MHz LPF response I didn't measure them for flatness
:-)) The source I used was surplus 16way 10BaseT switches which were junked
some time back but may still be lying in the back of store-room
cupboards.you get a lot on one board that way.
Alan
G3NYK
- Original
Hi
On Dec 14, 2014, at 12:01 PM, Francesco Messineo
francesco.messi...@gmail.com wrote:
On Sun, Dec 14, 2014 at 3:46 PM, Bob Camp kb...@n1k.org wrote:
Hi
On Dec 14, 2014, at 6:03 AM, Francesco Messineo
francesco.messi...@gmail.com wrote:
Hi all,
I've just found an old anti-theft
Hi
If you get the whole magnetics package (and not just a transformer) it probably
will have a pretty good common mode choke in it. If you go back to the days of
coax ethernet, the choke was more the “magic” that let them go to twisted pair
than the transformer.
Why does this matter?
Well
On Sun, Dec 14, 2014 at 6:12 PM, Bob Camp kb...@n1k.org wrote:
It’s unlikely that a consumer targeted GPS has a good dedicated PPS out of
it. Finding one that will do position hold is even less likely. You can get
modules that will do both for $20 and have a documented interface.
that's
Tom,
On 12/12/2014 08:01 PM, Tom Van Baak wrote:
Hi Li,
What you're doing is the same trick the Pendulum CNT-91 uses, as well as
modern Agilent frequency counters, and even my own picPET.
The good news is that for frequency measurement all those many samples and the sqrt(N)
advantage allow
Well with zero effort the spec sheet. Bob indeed there are common mode
chokes in them. Jeeze a lot in 1 package along with center taps.
Regards
Paul
WB8TSL
On Sun, Dec 14, 2014 at 12:22 PM, Bob Camp kb...@n1k.org wrote:
Hi
If you get the whole magnetics package (and not just a transformer) it
paulswedb at gmail.com
Another Time-nut suggested the use of 10 baseT ethernet transformers for 10
MHz isolation that he pulls from old ethernet boards. The 20F001n. These
are available from UTSource on ebay at 90 cents each NOS. Ordered 20.
Well I have to say as a BPF or something for 10 Mhz
On Sat, Dec 13, 2014 at 11:55 PM, Hal Murray hmur...@megapathdsl.net
wrote:
Can somebody confirm that the PPS and 15 MHz on the standby unit are
disabled?
Yes, the PPS is held active.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe,
From pictures bumpers are installed in an inverted position. Reverse them
Whoever put this together in CN did not have any idea of how this series of
cases are assembled or did not care
Content by Scott
Typos by Siri
On Dec 13, 2014, at 2:08 PM, HP-mini blm-ubu...@slingshot.co.nz wrote:
On 14 December 2014 at 02:31, Bob Camp kb...@n1k.org wrote:
Hi
You see a lot of surplus HP gear with the feet pulled. That was pretty
standard when gear was rack mounted.
Bob
There are not the usual 3 holes underneath where feet go.
I would nice to be able to find a few photos of a real
Hi
They are pretty fancy little gizmos if you want to do twisted pair. Volume
counts here in terms of making them cheap.
Twisted pair is *good* stuff for isolation at low frequencies. It’s not so hot
for microwaves. There is an item called STP (shielded twisted pair) that
addresses the
Hi
On Dec 14, 2014, at 2:14 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 14 December 2014 at 02:31, Bob Camp kb...@n1k.org wrote:
Hi
You see a lot of surplus HP gear with the feet pulled. That was pretty
standard when gear was rack mounted.
Hi,
I'm trying to make sense of the output from the status screen of this GPSDO
E-113 :SYSTEM:STATUS?
--- Receiver Status ---
SYNCHRONIZATION . [ Outputs Valid ]
SmartClock Mode
On 14 December 2014 at 19:32, Bob Camp kb...@n1k.org wrote:
There are not the usual 3 holes underneath where feet go.
I understand that they are different. The problem is the same though. Pulling
a box in and out of a rack with feet or bumpers on it is a pain. They often
get “lost” early
Am 14.12.2014 um 18:46 schrieb Arthur Dent:
Before you pooh-pooh these transformer/filters, try feeding a 10Mhz square
wave into a one of these filters and check out the fairly clean sine wave
you get out. These are handy cheap units and I have used them in the past
as a quick and not so dirty
Hi
SS is signal strength. There is a setting somewhere buried deep in the SCPI to
switch the display units.
Bob
On Dec 14, 2014, at 2:40 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
Hi,
I'm trying to make sense of the output from the status screen
On 14 December 2014 at 19:52, Bob Camp kb...@n1k.org wrote:
Hi
SS is signal strength. There is a setting somewhere buried deep in the SCPI
to switch the display units.
Bob
I guessed SS probably was signal strength, but what values are good
and bad? There's nothing in any manual I can find
On my rpi the jitter is between 2 and 10us iirc but it is a while since
I tested it. A quick peak shows me currently 3us jitter. Not bad for a
userspace solution imho.
Really? The PPS to GPIO interface is handles in user space? It is not
interrupt driven?
Yes it is. But, until
The 58503A in the picture on leapsecond.com looks very similar to my older
34401A DVM which doesn't have separate feet. The molded plastic pieces on
both ends have those crenelations that serve the same function.
Alan
On Sun, Dec 14, 2014 at 12:46 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
Hi
The desktop version (with handle) used the rubber “bumper” wrap around for
feet. The bumpers got pulled when they were rack mounted. The ones that got put
back on may or may not be identical to the originals. That’s a very normal part
of the surplus process. The 100% correct HP original
It's not worth making a PCB, not when you can buy the whole thing already
assembled for $3 with free shipping. I use these just as if they where a
single chip and put them in a socket. See eBay 141505833625 as an example.
Those holes are in 0.1 inch centers so you can figure out the size. (I
I would still like to experiment with it. As I wrote earlier I bought this
for a frequency reference, not a clock, but I would not object to a bit of
fun messing around with it.
If the goal is just getting good enough time onto the Solaris machine then
use NTP and some pool servers on the
Well, thanks, everyone, for the information. I appreciate the help.
First, I am presently not up to adding another project to my long list
of projects. I get whiplash every time I walk into the lab. Building a
GPSDO sound like fun. Perhaps down the line.
I figured I should add some
Hi
http://www.cnssys.com/files/M12+UsersGuide.pdf
On page 46 there is a pretty good chart for signal strength to c/n. The chart
for the Motoroal GPS module in yours should be quite similar.
If there is no SCPI then it’s a “feature enhancement” in a later version of the
firmware.
Are you
Yeah, I guess it's all relative. :) I do agree it is a HUGE
change compared to what the GPS should see in normal operation. The
same blast of air can be pointed at the GPSDO board for 20 seconds and
see no change. On high at the oscillator for 60+ seconds with no change
is apparent. The
I investigated those 10b-t isolation modules a while back, and have
saved every module from every network card and router/hub/switch that
I have junked out. The very old 10b-t stuff is the best for getting
LPFs and individual per-channel (port) type parts. When they started
making 10/100
On 14 December 2014 at 20:25, Bob Camp kb...@n1k.org wrote:
Hi
http://www.cnssys.com/files/M12+UsersGuide.pdf
Thank you.
On page 46 there is a pretty good chart for signal strength to c/n. The chart
for the Motoroal GPS module in yours should be quite similar.
If there is no SCPI then
Hi
Ok so down to two choices:
LTE Lite:
1) Comes up nice and fast (it’s a TCXO)
2) Modern GPS receiver
3) Good documentation
4) Very low power
5) Nice small size
6) Needs a box
7) You know where to find Jackson Labs if there is a problem
8) Getting a couple more in a couple years may
Much of the Malaysian Agilent gear uses this style of case with a wraparound
bumper in place of the system II feet and feet are removed when gear is rack
mounted.
One of my best surplus buys ever was a huge crate of mixed mounting hardware
feet / rack flanges etc I've been using that box o
On 12/14/2014 08:57 PM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
On 14 December 2014 at 19:52, Bob Camp kb...@n1k.org wrote:
Hi
SS is signal strength. There is a setting somewhere buried deep in the SCPI to
switch the display units.
Bob
I guessed SS probably was signal strength,
Hi
What you actually have tested (in this case) is temperature rate of change. The
parts involved are designed for a rate change in the 0.1 to 1C / minute range.
Taking them way outside that range leads to unpredictable results. In the case
of the GPS, it goes into some sort of failure mode.
Hi
On Dec 14, 2014, at 3:50 PM, Scott McGrath scmcgr...@gmail.com wrote:
Much of the Malaysian Agilent gear uses this style of case with a wraparound
bumper in place of the system II feet and feet are removed when gear is rack
mounted.
One of my best surplus buys ever was a huge crate
Hi Bob,
On 12/14/2014 06:00 PM, Bob Camp wrote:
Hi
On Dec 14, 2014, at 11:36 AM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 12/12/2014 06:15 PM, Bob Camp wrote:
Hi
On Dec 12, 2014, at 11:44 AM, Li Ang lll...@gmail.com wrote:
Yes, you are right. 5650_5650 is sig=ref case.
The Pulse Engineering PE-68025 module from Electronic Goldmine
(http://www.goldmine-elec-products.com/prodinfo.asp?number=G17078) has
common mode chokes and LPFs on both Tx and Rx lines. On clearance for $1.00
each. Datasheet is at
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK.
Registered in England and Wales, company number 08914892.
http://www.kirkbymicrowave.co.uk/
Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please)
On
Hi
If you type 58503A into Google, it will come up with a whole raft of pictures
of various angles on the device. Since none of them are from HP / Symmetricom,
any / all *could* be fakes. Logic suggests that at least 90% of them are the
real thing.
Bob
On Dec 14, 2014, at 4:08 PM, Dr.
On 9/28/14, 7:55 AM, Richard Karlquist wrote:
I find it odd that an instrument that probably cost $50,000 when new did
not have a TCXO as standard, and perhaps an oven as an option.
But I think HP did this sort of thing a lot. Something that would have
cost
very little to add, became an
On 12/14/14, 10:41 AM, paul swed wrote:
Well with zero effort the spec sheet. Bob indeed there are common mode
chokes in them. Jeeze a lot in 1 package along with center taps.
Regards
Paul
WB8TSL
I've seen a lot of MiniCircuits BNC 10.7 MHz BPFs used in equipment
racks over the years as a
kb...@n1k.org said:
My guess is that there is no PPS out of the device. It would be very unusual
if there was. Finding the NEMA output pin should be possible with an
oscilloscope. At that point, a simple serial connection to the server is
about all you need. Bring up the NEMA driver and it is
Hi
On Dec 14, 2014, at 4:14 PM, Jim Lux jim...@earthlink.net wrote:
On 9/28/14, 7:55 AM, Richard Karlquist wrote:
I find it odd that an instrument that probably cost $50,000 when new did
not have a TCXO as standard, and perhaps an oven as an option.
A *lot* of places that had this stuff
gign...@gmail.com said:
Based on my recent testing - including Solaris - you will be better off with
the Internet unless your USB adapter is far better behaved than the several
I have here
That depends, (TM)
How good/bad is your network connection? Mine gets over 3 seconds of queuing
Eds
Right I did see it used to turn square waves into sine waves. I will have
to try that.
But I am very happy with it even as a simple transformer. Thats what
surprised me something that goes nicely all the way down below 60 KHz. I
have to tell you I have been using lots of things that I have
Hi
On Dec 14, 2014, at 4:26 PM, Hal Murray hmur...@megapathdsl.net wrote:
gign...@gmail.com said:
Based on my recent testing - including Solaris - you will be better off with
the Internet unless your USB adapter is far better behaved than the several
I have here
That depends, (TM)
1) Downloaded ntp-4.2.6p5
If you are going to compile it (rather than use whatever comes with your
system), please use the Release Candidate version from:
http://support.ntp.org/bin/view/Main/SoftwareDownloads
[Anybody else willing to help... This is your chance. If you find bugs,
submit
What Bob suggested is just what I did. The leapsecond photos happened to
be the very first ones. I was careless when typing and didn't think about
gmail creating a link out of it.
Alan
On Sun, Dec 14, 2014 at 2:13 PM, Bob Camp kb...@n1k.org wrote:
Hi
If you type 58503A into Google, it will
Hi
Every one that I found showing enough detail had the bumper with feet rather
than the feet that clip into the case. A couple of power options are
illustrated (DC and AC) with various option numbers attached.
Bob
On Dec 14, 2014, at 5:25 PM, Alan Hochhalter alanh...@gmail.com wrote:
Thanks. See below:
On 12/14/2014 1:48 PM, Bob Camp wrote:
Hi
Ok so down to two choices:
LTE Lite:
1) Comes up nice and fast (it’s a TCXO)
2) Modern GPS receiver
3) Good documentation
4) Very low power
5) Nice small size
Good so far.
6) Needs a box
Boxes I have.
7) You know where
On Sun, Dec 14, 2014 at 4:08 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
I'd like to find a picture of a *genuine* 58503A.
The instance pictured has the 16-char display option so it doesn't look
like many of the images you find of the 58503A.
Hi
On Dec 14, 2014, at 4:20 PM, Dave Daniel kc0...@gmail.com wrote:
Thanks. See below:
On 12/14/2014 1:48 PM, Bob Camp wrote:
Hi
Ok so down to two choices:
LTE Lite:
1) Comes up nice and fast (it’s a TCXO)
2) Modern GPS receiver
3) Good documentation
4) Very low power
I don't mean to one up Chris, but if you are looking for
inexpensive, I have bought the same Pro Mini from this seller for
$2.58. Like Chris says, you can't buy the parts this for this.
And if you need the 3.3 VDC version: http://www.ebay.com/itm/191182699659
I bought six of the Pro Mini's from
I have to watch what I'm typing a little closer. I meant to say You
can't buy the parts this cheap.
Joe Gray
W5JG
On Sun, Dec 14, 2014 at 8:56 AM, Chris Albertson
albertson.ch...@gmail.com wrote:
It's not worth making a PCB, not when you can buy the whole thing already
assembled for $3 with
Hi
That display is a pretty hard part to fake. It’s not custom enough to be
impossible to find, but I doubt it’s a stock part at your local market.
Bob
On Dec 14, 2014, at 6:37 PM, Paul tic-...@bodosom.net wrote:
On Sun, Dec 14, 2014 at 4:08 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
If any of you want me to post more photos let me know. I have several of every
kind of HP/Agilent GPSDO product. And they are all genuine because I bought
them a decade before the China/eBay/GPSDO business.
Right, I probably should have included some of HP's GPSDO products in the
hpclocks
And 'scope probes :-)
On Dec 14, 2014 12:59 PM, Bob Camp kb...@n1k.org wrote:
Hi
On Dec 14, 2014, at 3:50 PM, Scott McGrath scmcgr...@gmail.com wrote:
Much of the Malaysian Agilent gear uses this style of case with a
wraparound bumper in place of the system II feet and feet are removed
Hi
(yes, this is a bit confusing … it’s my replies to a forward from Magnus who
got a bounce on submittal)
Begin forwarded message:
Date: December 14, 2014 at 7:57:39 PM EST
From: Magnus Danielson mag...@rubidium.se
To: Bob Camp kb...@n1k.org
Cc: mag...@rubidium.se
Subject: Re:
Hi
On Dec 14, 2014, at 8:05 PM, Pete Lancashire p...@petelancashire.com wrote:
And 'scope probes :-)
Ok, that’s just plain not fair. I could accept the motherland of bumpers and
handles. Tossing in scope probes … you are not to expect the usual fruit basket
from me at Christmas :)
Bob
Bob,
On 12/14/2014 02:10 AM, Robert Darby wrote:
This is an paper that may be of some interest to those interested in
clock distribution. The author, Jinyuan Wu has done considerable work
on FPGA TIC's with Fermi Lab.
http://www-ppd.fnal.gov/EEDOffice-w/Projects/ckm/comadc/TrapezCLK1b.pdf
Hi
…. but …
Low edge speeds = poor signal to noise = high jitter.
The result is a clock that aligns, but has high(er) jitter compared to a
conventional square wave clock. Most of the “lower phase noise / lower jitter”
progress in CMOS logic has gone hand in hand with faster edge rates.
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Hi Bob,
On 12/15/2014 02:22 AM, Bob Camp wrote:
Hi
(yes, this is a bit confusing … it’s my replies to a forward from Magnus who
got a bounce on submittal)
Whe're confusing Bob, I think they got that part now.
Begin forwarded message:
Date: December 14, 2014 at 7:57:39 PM EST
From: Magnus
Hi,
Agree. It's not ideal. In it's simplicity it achieves first degree delay
compensation, but it is not the best of signals you get.
You need to treat the signal as being essentially a sine, and overcome
the slew-rate.
It may be a useful technique besides it's limits.
Cheers,
Magnus
On
Ebay is your friend when you need footsies for your old HP equipment... just
search for HP FEET and you should be able to find what you need. As usual, you
will find sellers with reasonable prices and those that think they are made of
25k gold.
On 15 Dec 2014 00:52, Tom Van Baak t...@leapsecond.com wrote:
If any of you want me to post more photos let me know. I have several of
every kind of HP/Agilent GPSDO product. And they are all genuine because I
bought them a decade before the China/eBay/GPSDO business.
Hi Tom,
I would appreciate
Hi Dave,
There are several variations of 58503A, 58503B, 59551A, etc. Not to mention all
the Z38 variations of the basic HP SmartClock technology. Please do not bother
HP, Agilent, Symmetricom, or Microsemi. At this point I have more vintage gear
and way more historical and forensic interest
Hi
On Dec 10, 2014, at 11:12 PM, Mike Monett
timen...@binsamp.e4ward.com wrote:
[...]
Can you tell me some of the ones that do?
I have yet to see one for under $2K that does it correctly. I
don't have the cash to buy ones at those sort of prices. Some
have reported that the old Motorola
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