100mW) on the
paper of CSAC. Another mistake I made was that I thought only Cs could be used
in CSAC or MAC. Thanks for pointing that out, now I'm clear ith that. Regards.
Hui Zhang On 2017-10-13 00:06 , Tom Van Baak Wrote: Hi Hui Zhang, > in the
paper CSAC was described that it is based on
http://www.dz98.com/tp/an78-1.jpg
Regards.
Hui Zhang /BA6IT
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the x1000 expand
frequency, I have also tried use 100s gate time to get more resolution, but
all of these method doesn't work. So, can anyone tell me what is exactly
maximum digits that can SR620 display?
Regards.
Hui Zhang /BA6IT
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.
Hui Zhang BA6IT
At 2015-07-21 06:29:07, M. George m.matthew.geo...@gmail.com wrote:
I picked up an HP 8656B from the usual place and have been cleaning it
up... got around to testing the output which looks good on a cheap
frequency counter etc...
I'm wanting to use the 10 MHz output
GPIB command, they work very
well.
The Care Project Post in Chinese 38hot forum, many pics:
http://bbs.38hot.net/forum.php?mod=viewthreadtid=115514
This open source project can't be used for commercial purpose.
The main developer’s email: guangz...@163.com
Have a fun!
Hui Zhang /BA6IT
to do these job, so the question maybe can't be
reply quickly or 100% responsed. Anyway, this project is still in progress, if
any important news happened, I will let you people know.
Best regards.
Hui Zhang /BA6IT
At 2015-04-26 21:42:00, Bob Camp kb...@n1k.org wrote:
Hi
After poking around
Hi:
I also have a HP5386, it has very limited inside space, I think the MV89 is
too big to it, even MV89 is small size in familiar OCXO, so if I need mor
accurate, I used a extend GPSDO for its 10M stand.
Hui Zhang BA6IT
Sent from my Moto X
已通过我的 Moto X 发送
2015年4月25日 上午11:46于 d0ct0r t
The SR620's manual is perfect, there is a whole chapter has detail information
of performance test. You can use that way for check the counter's condition.
Hui Zhang
At 2014-11-22 07:51:41, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote
The manual stated HP5342A have a option 001, it's a HP10544 OCXO with PC card
connector(A24), but when I opened my HP5342A, there is very limited space, I
doubt it's whether can contain a big 10544 OCXO in there. So I always use a
external 10MHz to feed my counter.
Hui Zhang
At 2014-11
Hi Bob:
I agree with you. But the chapter is a easy way to check your new counter
when it arrived, and it's not only a calibration of just self test, it's
testing counter's performance on some level.
Regards.
Hui Zhang
At 2014-11-22 10:22:53, Bob Camp kb...@n1k.org wrote:
Hi
calibration work
of that 18011 OCXO at late times.
At last I'd say many thanks for this group, and every kindly people who
trying to help me, thank you!
Hui Zhang
At 2014-06-29 10:30:20, John Miles j...@miles.io wrote:
Are you using the normal marker or the frequency counter marker
10.42MHz. I was fully confused, do I need a calibration after I used
external 10Mhz stand? I read the manual again but not fou
nd any infomation about how to do it. What do I do now? Anyone give me a
suggestion? Any infomation will be appreciate.
Hui Zhang
about 'internal LO's are locked
to the 10 MHz reference', I thought the internal OCXO will not join work if a
EXT REF in, am I wrong?
Thanks you!
Hui Zhang
At 2014-06-29 10:24:22, Tommy phone thol...@woh.rr.com wrote:
Hi Hui...
The first thought is that you are tied to the resolution
to it) in ASCII message
head. I used a PC and Hyper Terminal to monitor my Z3801A, it gave me same
output. I didn't recall how it change its output mode, but point is how to turn
off this ECHO mode?
Thanks a lot.
Hui Zhang
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well, by send SYST:COMM:SER1:FDUP 0 to my Z3801A, I fix this problem.
Hui Zhang
At 2013-09-08 17:54:02,Hui Zhang ba...@163.com wrote:
Dear group:
I'm building a little Arduino project that is HP Z38xx's LCD monitor, I use
a Arduino Duemilanove board and a 12864 LCD screen to display
will be appreciate.
Hui Zhang
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, I will find a way to
do this test late. Thank you.
Here is a screen shot of my chart:
http://hkbbs.leowood.net:88/incomefiles/20139/18581578616.JPG
Hui Zhang
At 2013-09-01 07:51:24,Bob Camp li...@rtty.us wrote:
Hi
One thing to look at -
Take a large set of data and then sort
found in a
stablility frequency very close 10Mhz, it not happened. So I powered on a OCXO
and observe the output digit in a large range of frequency change.
Hui Zhang
At 2013-09-01 01:49:49,Tom Van Baak t...@leapsecond.com wrote:
Hi Hui Zhang,
Yes, I agree it looks strange
Sorry the screen shot's url is:
http://hkbbs.leowood.net:88/incomefiles/20139/19144671911.JPG
At 2013-09-01 09:05:56,Hui Zhang ba...@163.com wrote:
Hello Bob:
That's good idea, I will try it at right time, in fact I collect about 300
data by measured a OCXO warm-up, and I made a excel
not understand how HP define absolute EFC and relative EFC value, I
will figure it out.
Best regards.
Hui Zhang
At 2013-08-28 18:14:53,Azelio Boriani azelio.bori...@screen.it wrote:
The Z3815 doesn't store the surveyed location so at every power on it
has to survey again. It is supposed you
.
Thanks for your infomation.
Hui Zhang
At 2013-08-28 22:31:11,Azelio Boriani azelio.bori...@screen.it wrote:
You can take a look here
http://leapsecond.com/pages/z3801a-efc/
for some insight about the EFC of the Z3801A that should be the same
as the Z3815A.
I think that the Furuno's
Dear All:
I just got a Z3815A GPSDOS, now it working well, but I have few questions:
1, Why my Z3815A will do survey everytime at power on? Even its finished survey
100%.
2, Why its date is 1994 Jun 11? But time is correct.
3, What's type of antenna connector in back panel?
Thanks!
Hui
disappeared, the EFC value is:
Sent: :DIAG:ROSC:EFC:rel?
reply: +5.78499E-001
Sent: :DIAG:ROSC:EFC:ABS?
reply: +494788
So, I want know what is normal EFC range of Z3815A?
Hui
At 2013-08-28 09:03:40,Hui Zhang ba...@163.com wrote:
Dear All:
I just got a Z3815A GPSDOS, now it working well
Yes, it's MCX connector, I replaced one on my VP oncore board.
Hui
At 2013-08-06 18:19:53,Mark C. Stephens ma...@non-stop.com.au wrote:
Can't seem to find anything in Aussie that is Called OSX connector.
Could they be called MCX connector? We got some of those ):
--marki
-Original
Hello Juhua:
I also have a similar GPSDO, it troubled me long times, beacuse I made a
mistake of its model, I thought it's PICOSYNC II. So I use FEI's PicoSyncView
program trying to connect it, but got no any response. I think maybe FEI have
a old version PicoSyncView program for this
Hello Charles:
Don't worry about it, my brain auto ignore any comments of technology
irrelevant.
Hui
At 2013-07-10 13:58:47,Charles P. Steinmetz charles_steinm...@lavabit.com
wrote:
Perrier wrote:
You have absolutely NOTHING to fear. Here is why
Please keep your political comments to
. Potasium is essential for life and Rb
is chemically similar.
In short don't worry.
Robert G8RPI (also a geiger nut and collector of radioactive material)
From: Hui Zhang ba...@163.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Dear Group:
I have four compact Rb Stanard, but I am worried about what if my Rb lamp
broken in accident someday? How dangerous of this situration? Is Rb87 came out
from Rb lamp will be a disaster? You know I haven't any beta rays detect
instrument.
Hui
Dear Group:
I just got a VECTRON 5Mhz OCXO the model is 217-8422, does anyone have its
datasheet or PIN define? Thanks a lot.
Hui
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is very useful to make a choice
for me. Sorry for not reply everyone's mail.
Best Regards!
Hui Zhang
[time-nuts] HP53132A vs SR625
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Dear Group:
I am intend to buy a second-hand counter, I have not decided yet between
SR625 and HP53132A, they have very close price in surplus market of here, so,
which is better choice? Any suggestion will be appreciated.
Best Regards!
Hui Zhang
interval measure instrument.
Thanks again for everyone's advice, which is very useful to make a choice for
me. Sorry for not reply everyone's mail.
Best Regards!
Hui Zhang
At 2013-02-08 05:12:37,Brooke Clarke bro...@pacific.net wrote:
Hi Hui:
The HP 53132A is called a Universal
I also use a vintage IBM laptop to running Lady Heather, It's 128MB ram and
350MHz CPU, works very well.
Hui
-
At 2012-09-27 21:39:10,Michael Baker mp...@clanbaker.org wrote:
Hi, All--
I have dedicated an ancient Windows 95 laptop to sitting
on a shelf in my workshop
I just bought a second-hand Z3801A, it also had a error message when self test
- GPS Rcv error, and I saw a red LED on main board on. I want test it alone but
I don't know GPS board's pin define, can someone tell me? Thanks.
Hui
At 2012-09-16 21:20:26,Azelio Boriani azelio.bori...@screen.it
, 2012 at 4:43 PM, Hui Zhang ba...@163.com wrote:
Hello everyone:
I hnow 'heterodyne method' is very useful method of pricision
frequency measurement (use DBM and LPF), but I only found very few
infomation when I searched in early docments, Can someone give me more
information about
indeed there's a bit more than that to it, but that should get you
started.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Hui Zhang
Sent: Thursday, July 26, 2012 10:44 AM
To: time-nuts@febo.com
Subject: [time-nuts] About heterodyne
Hello everyone:
I hnow 'heterodyne method' is very useful method of pricision frequency
measurement (use DBM and LPF), but I only found very few infomation when I
searched in early docments, Can someone give me more information about this
'heterodyne method'? The block diagram is
pictures of it and see if any of the Time Nuts can identify
it? It probably is a generic version of some common interface.
Mike
On 6/18/2012 8:43 AM, Hui Zhang wrote:
Hello Mike:
Many thanks for useful information. The problem is I have no more
information of my USB-GPIB controller, so I
is probably ready to send the data, the controller
just needs to initiate its read cycle.
Mike
On 6/17/2012 10:17 AM, Hui Zhang wrote:
I have a old HP5386A counter and a OEM USB-GPIB controller(no tech support),
I use a serial port debug program to send command via USB-GPIB to HP5386A,
when I
need the command to your USB-GPIB controller to get
it to read. The counter is probably ready to send the data, the
controller just needs to initiate its read cycle.
Mike
On 6/17/2012 10:17 AM, Hui Zhang wrote:
I have a old HP5386A counter and a OEM USB-GPIB controller(no tech
support), I
I have a old HP5386A counter and a OEM USB-GPIB controller(no tech support), I
use a serial port debug program to send command via USB-GPIB to HP5386A, when I
send FU2(Measure period) or DI(increment display digis), the 5386 response
the command and worked well, the other control command in the
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