On 3 Feb, 2012, at 14:15 , Orin Eman wrote:
On Thu, Feb 2, 2012 at 7:16 PM, Hal Murray hmur...@megapathdsl.net wrote:
It's possible to use Bresenham with two integers 10,000,000 and 32,768
but I
found no way to perform all the 24-bit calculations on an 8-bit PIC quick
enough. Removing
Yes, DLL not DDL I made a mistake. Actually it is not in my schedule to
make such a divisor, just for speculation. The main thought here is that,
as you pointed out, it can be done avoiding PLL and DLL.
On Fri, Feb 3, 2012 at 1:49 AM, Hal Murray hmur...@megapathdsl.net wrote:
OK for the PSOC
Mine was a green LED out of the junk box, but I did use 330R in series. 1k8
seems rather large.
I will probably put something between the 5680 and the LED later. I have a
bin full of old 74xx, so should be easy.
I've seen lots of threads about the 5680 and tweaks etc., but not much on
actually
Long time ago I built a Jupiter-T companion board that included the loop
filter, divider and phase detector for the James Miller GPSDO. It also
includes a PIC that monitors the NMEA strings and displays different status
data via LEDs, and outputs data via RS232.
I have implemented a digital lock detector in my CPLD timing the phase
detector itself. It was years ago... let me find the VHDL code so that can
give any idea how to implement it for a microprocessor.
On Fri, Feb 3, 2012 at 10:58 AM, Roberto Barrios rbarri...@msn.com wrote:
Long time ago I
Randall
Thank you for your info. - I have now had time to check my manual and there
is a section that deals with a customer installed OCXO. I intend doing the
simple mod. today. Some months ago I obtained a 5328A for my collection of
HP counters, and I was very surprised at its quick and
Rick
Thanks again for your comments on the 10544 OCXO installation in a 5334B
counter. My initial result was because of my haste to check the working of
the OCXO, and obviously both oscillators were operative. The Service Manual
gives clear instructions for a customer retro installation which
On Fri, 3 Feb 2012 09:50:52 -
Rob Kimberley robkimber...@btinternet.com wrote:
Mine was a green LED out of the junk box, but I did use 330R in series. 1k8
seems rather large.
Then i'm not surprised that your FE-5680 refused to work :-)
Just calculate: 5V supply, approx 2V LED voltage - 3V
9mA
PaulG8GJA
-Original Message-
From: Attila Kinali [mailto:att...@kinali.ch]
Sent: 03 February 2012 12:55
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE5680 missing PPS soln
On Fri, 3 Feb 2012 09:50:52 -
Rob Kimberley
Uhhh... last time I checked 3V/330 ohms is 9.1 milliamps, not 90 mA...
-
Just calculate: 5V supply, approx 2V LED voltage - 3V over the resistor.
3V/330R = 90mA
___
time-nuts mailing list --
Randy,
I checked Didier's site and there is some information there but I seem to
remember a more detailed description with pictures of the cables, etc. I
can't remember if it applied to the RFTGm or the RFTGm-II.
Perhaps they are the same.
I still haven't found what I seem to remember though.
Thank you Paul.
:-)
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Reeves Paul
Sent: 03 February 2012 12:59
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] FE5680 missing PPS soln
9mA
Paul
On Fri, 3 Feb 2012 13:02:11 +
Mark Sims hol...@hotmail.com wrote:
Just calculate: 5V supply, approx 2V LED voltage - 3V over the resistor.
3V/330R = 90mA
Uhhh... last time I checked 3V/330 ohms is 9.1 milliamps, not 90 mA...
Uhh... last time i
Hi,
You need to check your maths...
:-)
Rob K
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Attila Kinali
Sent: 03 February 2012 12:55
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE5680 missing
Thanks to Dave and Randall - - yes I did discover the change-over
instructions, and hope to make the change over the week-end.
Roy
-Original Message-
From: Dave M
Sent: Tuesday, January 31, 2012 12:01 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP5334B with 10544 OCXO
There
On 2/3/2012 5:32 AM, J. L. Trantham wrote:
Randy,
I checked Didier's site and there is some information there but I seem to
remember a more detailed description with pictures of the cables, etc. I
can't remember if it applied to the RFTGm or the RFTGm-II.
Perhaps they are the same.
I still
try : http://www.n4iqt.com/lucentgps/
and : http://www.n4iqt.com/rfgmxo/
not sure if it is any help been a while I spent any time working on them,
Stanley
- Original Message -
From: Randy D. Hunt randy_hunt...@yahoo.com
To: Discussion of precise time and frequency measurement
This is one I was thinking about some German :
http://www.n4iqt.com/lucentgps/small_notes_rftg-m-xo.jpg .
Still looking know that I have some more info somewhere ...
Stanley
- Original Message -
From: Stanley timen...@n4iqt.com
To: Discussion of precise time and frequency measurement
I'm using a 556 dual timer, one section as an inverter to drive a lock
led, and the other section as a pulse stretcher to drive a 1 pps led.
Let's get on with it.
Don
Attila Kinali
On Fri, 3 Feb 2012 09:50:52 -
Rob Kimberley robkimber...@btinternet.com wrote:
Mine was a green LED out of
Just a FYI, you can request Linkedin to get on a do not contact list. This
way every time someone gets their address book harvested, you won't get
spammed. Below is the relevant part of an email I got from Linkedin.
--
Per your request, the email provided has been added
In theory only. I have been on both FaceBook and LinkedIn Do Not Contact
lists, and I got another spam within the last two days.
-John
==
Just a FYI, you can request Linkedin to get on a do not contact list.
This way every time someone gets their address book harvested, you
Thanks Rob Kimberley!
The manual that Rob found (Technical Manual TM 5680-0211) is available here:
http://c-c-i.com/node/166
Best regards,
--
Bob Smither, PhD Circuit Concepts, Inc.
=
On Fri, Feb 3, 2012 at 1:08 AM, Dennis Ferguson dennis.c.fergu...@gmail.com
wrote:
On 3 Feb, 2012, at 14:15 , Orin Eman wrote:
On Thu, Feb 2, 2012 at 7:16 PM, Hal Murray hmur...@megapathdsl.net
wrote:
It's possible to use Bresenham with two integers 10,000,000 and 32,768
but I
Rob,
Can you upload it to my site?
www.ko4bb.com/manuals/
THANKS IN ADVANCE,
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Rob Kimberley robkimber...@btinternet.com
Sender: time-nuts-boun...@febo.com
Date: Tue, 31 Jan 2012
I've seen some comments and questions regarding the performance of the 5680
Rb's.
Yesterday I took delivery of two 5680's. In case anyone is interested, I'm
seeing adev numbers in the 2 to 2.5 E-12 range from 80 thru 200 seconds. The
unit under test has been running for approx one hour
Someone earlier today made the point that for all the talk about the FEI rubes,
there hasn't been any real performance info posted. That prodded me to start
an experiment I've been meaning to do for a while. I have samples of all three
of the common telco Rb standards -- Efratom FRS, Datum
Thanks John!
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of John Ackermann N8UR
Sent: Friday, February 03, 2012 9:41 PM
To: Time-Nuts
Subject: [time-nuts] Rubidium Performance
Someone earlier today made the point
Someone earlier today made the point that for all the talk about the FEI
rubes, there hasn't been any real performance info posted. That prodded
me to start an experiment I've been meaning to do for a while. I have
samples of all three of the common telco Rb standards -- Efratom FRS,
Datum
Once my first unit has warmed up properly I'll be curious to see how the adev
compares (I can't measure phase noise.) If any one is interested I've also got
some adev data from my one working temex lpfrs Rb unit. (I also have another
unit that only locks once in a while.)At approx 1/3
Just for completeness sake, here is a screen capture off of my DSA-602 of
the 1pps. Note that the trace starts 500ns _before_ the 1pps triggers the
capture. Ah the wonders of digital sampling.
http://www.fastbobs.com/pictures/1pps.jpg
Also as a pdf
http://www.fastbobs.com/pictures/1pps.pdf
From: John Miles jmi...@pop.net
So far, the FE-5680A is doing well in the ADEV department, but its AD9832
DDS chip adds some substantial noise and spurs to the 10 MHz output. [...]
The overall SSB C/N ratio I'm seeing between 1 Hz - 100 kHz is pretty much
in line with Analog Devices'
t...@leapsecond.com said:
I'm curious how a 10 MHz-driven high-end DDS would generate 32 kHz with the
lowest possible jitter?
What do you mean by high-end DDS? A chip from Analog Devices or one from
Xilinx? :)
If you use a classic DDS chip with a binary adder and ROM, it will have low
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