Hi List,
Thanks for all the suggestions on monitoring temperature at the location
of the XO. A lot of fine ideas. I found a solution, not inexpensive,
at the same time tvb recommended it to me. It can be placed near
the XO, no construction needed, and continuously outputs data.
Some of the USB mo
Thanks for the input.
After reading your comments I placed a bid for a Racal.
Chances I will be outbid but nothing ventured
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliab
On 10/6/11 4:24 PM, Magnus Danielson wrote:
Consider that you have 7 digits of time-stamp value and 8 digits of hex
code for time-stamped inputs and a carrige return, you need to output 16
bytes. Considering that it takes 32 read-outs a second in peak. This
means 512 bytes a second or a rate of
On 10/06/2011 10:15 PM, Chuck Forsberg WA7KGX N2469R wrote:
[...]
I notice they seem to have fans. How much noise do
they make?
Lots. HP does not seem to take acoustic noise level in to consideration
in its designs.
I have an old HP5245L. The fan is quite noisy. When I upgraded to the
Yes I have a Trimble Thunderbolt. Two actually.
Some of these counters are impressive pieces of work.
Too bad they can't take you to Jupiter, or at least Mars.
(In some sense they probably can!)
I notice they seem to have fans. How much noise do
they make?
--
Chuck Forsberg WA7KGX N2469R
> For a handy list of cheap fpga boards:
>
> http://tristesse.org/CheapFPGADevelopmentBoards
>
>
> I notice he's recently added the SOIO to the list. I've had my eye on that
> board as well for a while. If all you want is say 20 odd counters as you
> mentioned, then that even fits in the cheapes
i know I'm late .. but agree with some of the oldies, but a big question I ask
first, is size important ?
I'm going through the same exercise setting up a bench for someone who's
an ex EE who now wants to have a bench to do some design with again. He's
lucky. Many are not now days.
-pete
On Thu,
For a handy list of cheap fpga boards:
http://tristesse.org/CheapFPGADevelopmentBoards
I notice he's recently added the SOIO to the list. I've had my eye on that
board as well for a while. If all you want is say 20 odd counters as you
mentioned, then that even fits in the cheapest spartan-6 LX
I predict this system will not be in operation any time soon.
On 10/6/2011 7:36 PM, Rix Seacord wrote:
I wonder if the government will allow a tax deduction for the modification of
the gps receivers in aircraft if this deal goes through.
Considering it easily cost 12k plus for a low end comb
jim...@earthlink.net said:
> Something with, say, 32 inputs/pins brought out to a header on the eval
> board would be nice. maybe the Spartan 3A or 3E for $200? (I'll have to
> look at the data sheets)
Digilent has a good collection of low cost FPGA boards:
http://www.digilentinc.com/Produc
I was recently able to pick up a nice HP5335 with a 10811 oscilator and
enhanced GPIB board for <$100.00 from the usual auction site.
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I wonder if the government will allow a tax deduction for the
modification of the gps receivers in aircraft if this deal goes through.
Considering it easily cost 12k plus for a low end combo gps, nav com
unit. Just having a shop put it on the bench can cost 250 buck much less
what it cost to re
Hi Jim,
On 07/10/11 01:02, Jim Lux wrote:
since I rudely tagged onto someone else's search for a suitable counter,
I'll restate my need here..
I want to set up an experiment to characterize a bunch (several dozen?)
of cheap XOs (e.g. SiTime parts) over temperature and time and power
cycles. I'm
since I rudely tagged onto someone else's search for a suitable counter,
I'll restate my need here..
I want to set up an experiment to characterize a bunch (several dozen?)
of cheap XOs (e.g. SiTime parts) over temperature and time and power
cycles. I'm not looking for 1e-15 adev at 100 second
What resolution do you want?
The HP 5315A/B or 5316A/B offer 100 MHz, various time base options, the
possibility of battery operation (5315A), HPIB, external time base input
(5315B and 5316A/B) and 8 digit resolution. They also offer an Option C, to
1 GHz. Directly, they frequently go to 150 MHz
My first thought was to use a bunch of tvb's picPETs backwards. :) Feed
them all the same PPS and clock each one with one of the clocks you want to
test. But that requires a serial port per XO. Maybe you have an old
many-input serial box in the junk bin, but I'm always short of them.
I use
> I'm actually looking a similar problem.. I want to set up an experiment to
> characterize a bunch (several dozen?) of cheap XOs over temperature and
> time and power cycles. I'm not looking for 1e-15 adev at 100 seconds kind
> of performance: maybe more like 1E-6 or 1E-7 ADEV.
I'd like somet
If you can find an HP 5316B at the right price it would meet your basic needs.
Takes 1, 5, or 10 MHz for external reference (has 10MHz out). The A and B
channels are 100MHz rated, optional C channel is 1GHz. The optional TCXO (or
OCXO) is likely not needed in your case. GPIB might prove handy. I
Hi
Maintainable is a tough call on a lot of stuff. You might do better to shop
for a counter in the $30 to 50 range and plan on buying 2 or 3. There are a
lot of people selling printed manuals for the price of a counter ...
Quick check of $30 to $50 shows:
HP5314
HP5315
HP5316
HP5326
HP5383
Flu
The current administration WANTS LightSquared.
If the government doesn't defend the case, the project will go forward
quickly. And, AFAIK, there is no legal requirement that the FCC defend the
case.
-John
>Fine. Court cases take many, many years. If they go that route we
>
Fine. Court cases take many, many years. If they go that route we
won't have to worry about this for a while, and it increases the
probability we would have already upgraded due to wanting/needing newer
features and even just random failures.
On 10/06/11, Chuck Forsberg WA7KGX N2
On 10/6/2011 8:46 AM, Chuck Forsberg WA7KGX N2469R wrote:
I would like to get a counter that
a) has 10 MHz clock input
b) counts directly to 30 MHz (50 or 145 preferred)
I would like it to be maintainable and well under $100
including shipping.
I have seen Fluke 1953a counters advertise
On 10/6/11 8:46 AM, Chuck Forsberg WA7KGX N2469R wrote:
I would like to get a counter that
a) has 10 MHz clock input
b) counts directly to 30 MHz (50 or 145 preferred)
I would like it to be maintainable and well under $100
including shipping.
I have seen Fluke 1953a counters advertised on Ebay.
I would like to get a counter that
a) has 10 MHz clock input
b) counts directly to 30 MHz (50 or 145 preferred)
I would like it to be maintainable and well under $100
including shipping.
I have seen Fluke 1953a counters advertised on Ebay.
Is this a good choice or would something else be
My this is getting nasty.
Especially since it appears various folks may have had there hands in
various cookie jars. Per a TV technology article this week.
On Thu, Oct 6, 2011 at 11:18 AM, Chuck Forsberg WA7KGX N2469R
wrote:
> http://www.avweb.com/**avwebflash/news/LightSquared_**
> GPS_Issue_FCC
http://www.avweb.com/avwebflash/news/LightSquared_GPS_Issue_FCC_205511-1.html
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portla
At 16:25 06-10-11, you wrote:
So they are deploying LightSquared? :)
Possibly testing for impact of ... ?
"Mala tempora currunt" !
73 - Marco IK1ODO
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So they are deploying LightSquared? :)
From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of
David J Taylor [david-tay...@blueyonder.co.uk]
Sent: Thursday, October 06, 2011 3:25 AM
To: Time-nuts mailing list
Subject: [time-nuts] OT:
Looks like a nice device. I do like continuous monitoring!
From the datasheet:
"The interval between measurements can be configured by
link selection to be in the range 80ms to 5 minutes."
Kevin
Oh, how incompetent of me to have missed that! I was looking for the spec
on the Web page. A
On Oct 6, 2011, at 3:21 AM, David J Taylor wrote:
>> http://www.g4jnt.com/SerialLogger_ShortForm.pdf
>
> I couldn't find what sampling rates the device supported, but otherwise I'm
> keen to acquire one!
Looks like a nice device. I do like continuous monitoring!
>From the datasheet:
"The inte
Folks,
I have received the following notice:
NOTIFICATION OF GPS JAMMING EXERCISES
RAF SPADEADAM, CUMBRIA, NOVEMBER 2011
Dates: Between 28 November and 9 December 2011 inclusive (Week days only).
Times: between 0900 and 1600 GMT.
Location of MULTIPLE
And there is this kit from Andy, G4JNT, which might do
www.g4jnt.com/HF-10.htm
http://www.g4jnt.com/SerialLogger_ShortForm.pdf
Paul G8GJA
I couldn't find what sampling rates the device supported, but otherwise
I'm keen to acquire one!
73,
David GM8ARV
--
SatSignal software - quality so
And there is this kit from Andy, G4JNT, which might do
www.g4jnt.com/HF-10.htm
http://www.g4jnt.com/SerialLogger_ShortForm.pdf
Paul G8GJA
-Original Message-
From: shali...@gmail.com [mailto:shali...@gmail.com]
Sent: 05 October 2011 21:00
To: Time-Nuts
Subject: Re: [time-nuts]
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