Gentlemen,
I am just going to improve my EZGPIB utility so that it can make use of more
than one GPIB-interface (supported by GPIB32.Dll, not Prologix). I have been
trying to enumerate all detected interfaces by using
ibdev(bi,0,0,T300ms,0,1)
in a loop where bi starts with 0 and is incremented
Given that Arduinos are now sold in (almost) every super-market, and the
programming IDE is free/open-source, and the C/C++ code is familiar to
many, I would have thought the logical evolution of the pictic is to
become an Arduino shield?
One drawback (AFAIK) is that e.g. Arduino Due doesn't have
Magnus,
(Going from memory here...) I seem to remember that NPL in UK used to add
0.1 second to each of the first 10 seconds after the hour. If this wrong, I
hope someone picks up on it!
Cheers
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Try to stop the HPIB driver... maybe the driver is reporting as
available even if no hardware is actually connected.
On Thu, Jan 23, 2014 at 12:22 PM, Ulrich Bangert
df...@ulrich-bangert.de wrote:
Gentlemen,
I am just going to improve my EZGPIB utility so that it can make use of more
than one
Magnus,
I have little experience with radio-based public time dissemination
services, but some with GPS/NTP/PTP, so here's some info - hope it's of
some value to you.
For US and European exchanges, the leap second time happens outside trading
hours, so maybe that's why we've heard little
It seems that that the QEI on a dsPIC are internal hardware counters
decoding the A/B phases of optical encoders: are you sure that they
can be used like a time interval counter? Better to use the timer
capture dedicated input.
On Thu, Jan 23, 2014 at 12:31 PM, Anders Wallin
Hi Dick,
They look very nice, but kind of big for my desktop !!
Not very clear about what message you were responding to...
Didier
On Wed, Jan 22, 2014 at 4:19 PM, Richard Solomon w1...@earthlink.netwrote:
They look very nice, but kind of big for my desktop !!
Thanks anyway,
73, Dick,
Thanks for your suggestions so far everyone,
The picPET would be a great solution if it could run at higher frequencies
- but now there's a separate thread about that :)
Magnus - my reference is a Brilliant Telecom (now Juniper Networks TCA
series) PTP grandmaster (TCA8000), which does PTP and
The picPET is vastly different from an Arduino. My goal with the picPET was to
make a self-contained, single-chip, works-out-of-the-box continuous
time-stamping event counter with an $1 8-pin DIP chip, even if the resolution
wasn't good by time nut standards. You can see how simple it is:
It was in response to the suggestion I look at BRG Precision.
73, Dick, W1KSZ
On 1/23/2014 5:57 AM, Didier Juges wrote:
Hi Dick,
They look very nice, but kind of big for my desktop !!
Not very clear about what message you were responding to...
Didier
On Wed, Jan 22, 2014 at 4:19 PM,
Azelio,
Try to stop the HPIB driver...
I do not have any HPIB (=HP specific) driver in my system. Instead I use the
GPIB32.DLL that comes together with every National Instruments GPIB
interface adapter. The DLL is basically thought as the National Instruments
support for C-Programmers but I
Hi Azelio,
One of the internal timers is exactly what I was thinking of. I haven't gotten
into this yet, but it looks like the dsPIC33 can accept a high quality
reference clock as an input, and then use a multiplier to get it up above
100MHz. I think 200MHz is the limit in some packages. My
Has anyone else looked at the Parallax Propeller processor for timing
functions? It has 8 cooperative cores and has a number of intrinsic timing
functions for measuring intervals accurately, or for generating
tightly-timed repetitive pulse trains, within the frequency accuracy range
of the
Wojciech,
On 23/01/14 14:46, Wojciech Owczarek wrote:
Thanks for your suggestions so far everyone,
The picPET would be a great solution if it could run at higher frequencies
- but now there's a separate thread about that :)
Magnus - my reference is a Brilliant Telecom (now Juniper Networks
As usual the hardware peripherals integrated in microprocessors are
not really independent from the core: the capture signal must be
synchronized with the microprocessor's clock to enter the core. This
require usually a clock with double the speed you need for a real
hardware counter implemented,
On 2014-01-21 22:53, Andy wrote:
Dick asked,
What I am looking for is a way to display Local Time (MST) and Zulu (GMT)
time in a small (6 X 8 or similar) package. There must be two displays
and
both lock up to NBS.
Has anyone seen such a thing ?
Might not meet all your specs, but MFJ may
On Thu, 2014-01-23 at 12:58 -0700, Brian Inglis wrote:
Looks like MFJ-108B
http://www.mfjenterprises.com/Product.php?productid=MFJ-108B fits
your specs at a quarter the price, and it says it can be synced to WWV,
although their
product manual (single page setting guide) does not mention
I have one of those. One clock runs fast, one runs slow. Maybe if I
average them out
73, Dick, W1KSZ
On 1/23/2014 1:14 PM, bjon...@mindspring.com wrote:
On Thu, 2014-01-23 at 12:58 -0700, Brian Inglis wrote:
Looks like MFJ-108B
The 121B will only offset the 5 NA Time Zones.
73, Dick, W1KSZ
On 1/23/2014 12:58 PM, Brian Inglis wrote:
On 2014-01-21 22:53, Andy wrote:
Dick asked,
What I am looking for is a way to display Local Time (MST) and Zulu
(GMT)
time in a small (6 X 8 or similar) package. There must be two
Has anyone else looked at the Parallax Propeller processor for timing
functions?
Hi Brian,
Oh yes. Really nice chip. But for precise timing applications I had huge
problems with phase and temperature stability of its internal PLL. I tried half
a dozen different boards purchased over several
Try this:
http://www.febo.com/pipermail/time-nuts/2010-February/044476.html
It uses the NTP SHM reference clock.
Scott
On 01/20/2014 09:01 PM, ken johnson wrote:
I currently have my router/firewall acting as both an NTP client, getting
it's time from the net, and an NTP server
Good thread.
Yes I am very aware of the parallax propeller. As you both say kind of a
crazy chip. I have used another product the SXB micros. They run Basic at
80 Mhz and are so cheap that If I have more than a few chips I just switch
over. Unfortunately they are obsolete in the dip form. When I
That´s a big problem. To go sub-100ns you must make frequency 10Mhz,
and most of these chips only run at 10MHz using internal PLLs (you
can´t directly clock them with more than about 20MHz.. or at least the
datasheet says so).
A FPGA has no such problems (or at least they are very
Hi!
I bought a Trimble/Nortel GPSDO
http://www.ebay.de/itm/300933951405?ssPageName=STRK:MEWNX:IT_trksid=p3984.m1497.l2648
and Lady Heather's now tells me that everything is alright - except
- DAC 6.04V
- OSC BAD
- osc age alarm
The rectangle 10MHz output signal (J5) shows a signal at about
Hi
That’s a cell phone base station board. It’s got a bunch of outputs, some of
which are related to the cell network it was built for rather than 10MHz. I’d
bet your 9.8 MHz output is one of those. They are DDS based so there likely is
some range of possible outputs.
The age alarm is not
OK, understood. So it seems that the next step is to try to connect
with those reported devices and see if an error is returned,
identifying the really connected ones from the placeholders...
On Thu, Jan 23, 2014 at 5:00 PM, Ulrich Bangert df...@ulrich-bangert.de wrote:
Azelio,
Try to stop the
The OSC age alarm says the oscillator EFC control voltage is getting near to
its programmed limit. The DAC alarm says that the EFC dac setting is it is at
the limit. I suspect that your oscillator EFC input is bad. I've seen this on
a couple of boards.
I recently acquired a Z3816A as a 'spare' and it does not work reliably.
The ALARM LED sometimes comes on and sometimes doesn't. Sometimes it tracks
and locks appropriately and other times it goes into HOLDOVER. The main PCB
is very dirty and has the appearance that it has been in a humid and
Thanks for the reply Scott- but I have to say I am a little confused, LH is
running on a windows box and the program you pointed to is a linux one- am
I missing something here?
Ken.
On Fri, Jan 24, 2014 at 8:10 AM, Scott Mace sm...@intt.net wrote:
Try this:
What I am looking for is a way to display Local Time (MST) and Zulu
(GMT) time in a small (6 X 8 or similar) package. There must be two
displays and both lock up to NBS.Has anyone seen such a thing ?
A tad bigger then your request:
Joe
Been a while. Sounds like a reasonable approach with the soap and water.
The key is not to force water into the inductors. I take soapy water and a
tooth brush it works wonders. Then dry in an oven at about 100 degrees just
to drive off the moisture. Very gentle.
I guess the other point is to
On 23/01/14 14:29, Wojciech Owczarek wrote:
Magnus,
I have little experience with radio-based public time dissemination
services, but some with GPS/NTP/PTP, so here's some info - hope it's of
some value to you.
For US and European exchanges, the leap second time happens outside trading
hours,
i think most people run LH on Linux either VMWare or Wine. That might be
your first move. Virtualize the windows system and run LH on that.It
make it better really because then you can export the display over the
network.
So, install Linux on the PC, then run Windows on that
Maybe one way
I did a quick comparison between Lady Heather under Wine+Linux,
Lady Heather under Win7, and WWV.
The NTP time on my office machine agrees with WWV on 5 MHz
as closely as my eyes and ears can tell. Linux is running its default
NTP, Win7 is running Meinberg (as I recall).
LH updates its time
I recommend against using tap water on any electronics. Use RO or
distilled water; that won't leave behind minerals when it evaporates.
Most IPA is only 70%; the balance is water. For flux removal, use 99% or
anhydrous IPA, available at most industrial hardware stores.
And, I surely would
Well, of course you can. You can do that with any clock. Claiming that it
can be synced to WWV without stating manually is misleading. Stating that
it _must_ be done manually is redundant. No wonder their manual makes no
mention of this supposed feature.
Brian Garrett
-Original
Richard wrote:
The 121B will only offset the 5 NA Time Zones.
And Zulu too, right?
So aside from the size, it meets your requirements, right?
I guess you would have to change its time zone when the rest of the
country changes to/from Daylight Saving time, but that's probably true
of most
Hello all,
I have had a MV89A running now for a couple of years now. It is inside of a
Dewar along with bypassing capacitors and the adjustment pot.
The end is sealed insulation. For a matter of convenience the oscillator is
mounted upside down. I am planning on reconfiguring the box it is
You are correct, I missed that. If the one I have on order doesn't work,
I'll get one of those.
Thanks for the heads-up,
73, Dick, W1KSZ
On 1/23/2014 1:56 PM, Andy wrote:
Richard wrote:
The 121B will only offset the 5 NA Time Zones.
And Zulu too, right?
So aside from the size, it
I guess you would have to change its time zone when the rest of the country
changes to/from Daylight Saving time, but that's probably true of most of
them.
There is a DST bit in the WWVB packet format. (actually 2 of them)
http://en.wikipedia.org/wiki/WWVB#Announcement_bits
Of course,
The main PCB is very dirty and has the appearance that it has been in a
humid and dusty environment. I am suspicious that there are some 'leakage'
issues related to this dirt and would like to wash the board. What would
the group recommend for cleaning the board?
Google for PCB cleaning
Also, I seem to recall a command that can be sent by SatStat to change from
GPS time to UTC time but I can't find it in my files. Is there such a
command or am I hallucinating?
My notes for the Z3801A say:
:diag:gps:utc 1
http://www.realhamradio.com/GPS_User_Notes.htm (undocumented)
Tektronix used to clean their oscilloscopes in a soap and water bath
in something like a dish washer.
This was published in Tek Scope V4 #4 July 1972.
I can send the pdf if interested.
Glenn
WB4UIV
At 10:13 PM 1/23/2014, you wrote:
Joe
Been a while. Sounds like a reasonable approach with the
Folks, soap and detergent are not the same thing.
Larry
On 1/23/2014 11:22 PM, Glenn Little wrote:
Tektronix used to clean their oscilloscopes in a soap and water bath in
something like a dish washer.
This was published in Tek Scope V4 #4 July 1972.
I can send the pdf if interested.
Glenn
You probably want ibfind() rather than ibdev(). Take a look at gpibport.cpp
in the TimeLab source (drivers/shared/gpibport.cpp under the installation
folder), in the enumerate_ports() function.
-- john, KE5FX
Miles Design LLC
-Original Message-
From: time-nuts-boun...@febo.com
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