Hi folks,
OK, have found the manual and it's not as bad as I remembered; there
are six 17x11 fold out sheets. The schematics are dated August 12th
1999 and are for Revsion H. I'll scan the schematics and the parts
list in case that helps folks with non rev. H units. There are no
copies of the
albertson.ch...@gmail.com said:
I think GPS can help by using it to control the transmitter and to set the
receiver frequencies but the phase of the frequency hop clock is
determined by the time of flight of the signal, something a receiver can't
know in advance
Right. But how big is the
On Feb 22, 2011, at 11:53 PM, jimlux wrote:
On 2/22/11 12:12 PM, Magnus Danielson wrote:
Hi Jim!
On 02/22/2011 02:34 PM, jimlux wrote:
On 2/21/11 10:12 PM, Michael Lombardi wrote:
I'm trying to determine the first product that could automatically
decode and display a digital time code.
Hi
Hop rates below 1,000 per second are far more common in simple systems than
anything faster than that. At VHF, you are looking at a everybody being within
one hop of each other. That makes the idea of a GPS based code start fairly
reasonable.
Bob
On Feb 23, 2011, at 5:03 AM, Hal Murray
El 23/02/2011 05:53, jimlux escribió:
CCSDS time codes reference NASA 36 bit.. maybe a reference it's in the
back of the CCSDS standard.
First CCSDS.301 issue seems to be January 1987, and references (on the
4th issue, Nov 2010) listed at last page seems not very old. CUC
recommended epoch,
Anyone hear from Time-Nut Steve Rooke from Christchurch ?
Cheers
--
Raj, VU2ZAP
Bangalore, India.
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On 2/23/11 4:48 AM, Bob Camp wrote:
Hi
Hop rates below 1,000 per second are far more common in simple systems than
anything faster than that. At VHF, you are looking at a everybody being within
one hop of each other. That makes the idea of a GPS based code start fairly
reasonable.
Bob
OK, Here is the result of my lunch-break scanning session. I had to
use a desktop A4 sized scanner so you might need scissors and tape to
make sense. The 17x11 sheets are split onto overlapping two letter
sized pages (Rb lamp driver is on last couple of pages). Don't have
time to tidy it at this
On 2/23/11 5:09 AM, Javier Herrero wrote:
El 23/02/2011 05:53, jimlux escribió:
CCSDS time codes reference NASA 36 bit.. maybe a reference it's in the
back of the CCSDS standard.
First CCSDS.301 issue seems to be January 1987, and references (on the
4th issue, Nov 2010) listed at last page
Robert, THANK YOU
Had, K7MLR
At 07:29 AM 2/23/2011, you wrote:
OK, Here is the result of my lunch-break scanning session. I had to
use a desktop A4 sized scanner so you might need scissors and tape to
make sense. The 17x11 sheets are split onto overlapping two letter
sized pages (Rb lamp
On 10/30/2010 11:58 PM, Robert Darlington wrote:
I finally got around to asking this question..I have been working on
my 4501 timeserver for the past year.
Bought the parts a year ago...finally put things together with all of
the TAPR boards connected to the 4501.
I copied your Ghost
I will soon have my 11 th piece of equipment that I want to feed 10
MHz (and some oldies 5 and 1).
What is the current though on making one's own distribution box ?
-pete
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Hi
How good a 10 MHz do you need noise wise?
If the stuff is common lab gear, there are a bunch of ways to go. If you are
driving dual mixer setups then your choices narrow down a bit. Having stuff
on one bench (and ground) is easier than running cables hundreds of feet.
Assuming it's normal
Robert,
as well from my side a big THANK YOU!
Arnold
Am 23.02.2011 16:29, schrieb Robert Watson:
OK, Here is the result of my lunch-break scanning session. (...)
http://people.bath.ac.uk/eesrjw/prs10/PRS10_revH_BoM_schematics.pdf
___
time-nuts
On Wed, Feb 23, 2011 at 8:12 AM, Joe S. Borovetz wa5...@tapr.org wrote:
On 10/30/2010 11:58 PM, Robert Darlington wrote:
I copied your Ghost image to a 4 GB San Disk CF Card (used Windows to do the
install)
I don't have a 4501 so I'm guessing: A common problem is that the
memory card is to
Hi
The format of the CF card matters a *LOT* to the 4501. A normal Windows
install can recognize more format variations than the 4501 can at boot time.
Some cards work with the 4501 and some cards don't. I've had cards from the
same vendor / same name / same size / same part number come in. The
was thinking along the lines of this (now discontinued)
http://www.tapr.org/kits_tadd-1.html
On Wed, Feb 23, 2011 at 8:51 AM, Bob Camp li...@rtty.us wrote:
Hi
How good a 10 MHz do you need noise wise?
If the stuff is common lab gear, there are a bunch of ways to go. If you are
driving
Initial destinations are HP 8665A, 5345A, 3325B, 5370B, 5372A, etc.
for the critical stuff
and for some oldies like a GR 1161A and HP 5110A at 1 and 5 MHz.
then at some point I'll want it for projects of my own but first want
to get the back of the benches
first..
-pete
On Wed, Feb 23, 2011 at
Hi
That would be the video amp alternative. Works fine at some level. I don't
have one so I'm only guessing that it's in the 2x10^-11 at 1 second range. I
would be very surprised if it's not though.
Is that good enough for the gear you have? I certainly have not seen much
stuff that would be
just to get going until can 'upgrade' to something better. The TAPR
was pretty cheap, but quite well though out like most of their stuff.
-pete
On Wed, Feb 23, 2011 at 10:03 AM, Bob Camp li...@rtty.us wrote:
Hi
That would be the video amp alternative. Works fine at some level. I don't
have
Hi
I don't believe most of that stuff is going to need a super standard as far
as short term or phase noise is concerned. The only exception might be the
5370B. I haven't looked at it's clock setup / PLL in a while.
Bob
-Original Message-
From: time-nuts-boun...@febo.com
Hi
Since it's in the no longer available category, it may not be much of a
solution. Not much need to upgrade for most of what you will be running.
Another question would be weather you local standard is good to 1x10^-11 at
1 second. If it's not, then that might be the place to put your money.
I was at Skycrafter yesterday and noticed about a half dozen 4 channel
video amplifiers about the size of a small book for sale $15 each. These
looked new and sorry, I did not note the make or model. They might be
suitable for timebase freq distribution. They have BNC connectors,
likely 75
Have a look at http://g4hup.com/DA/DA.htm These are still available!
73,
Dave, G4HUP
From: Bob Camp li...@rtty.us
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Wednesday, 23 February, 2011 18:11:16
Subject: Re: [time-nuts]
All --
I hesitate to make pre-announcements, but TAPR plans to produce a very
high performance replacement for the TADD-1, as well as a single-channel
version for buffer/isolation amp use.
I'm just on the verge of ordering alpha boards for the single channel
version. I really can't hazard
Hi,
You may recall we discussed here some time back about how time was
disseminated in days gone past, and mentioned Time Balls at various
locations from Greenwich onward.
I'd forgotten that there was (and still is) one at Lyttleton, NZ, right
at the epicentre of the big earthquake. This
Did you copy it? or did you burn the image using ghost? Sorry for the
question, I just don't want to assume it's on there correctly. The card
format doesn't matter at all if you're using ghost to apply the image since
it will just extend whatever filesystem is in the image to the rest of the
Sorry if I missed this before, but is there a utility that will allow me
control my PC's time from my Thunderbolt GPS-DO?
73s
Brad Dye, K9IQY
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Hi guys,
need some help with a cal on my SR-620 counter.
In frequency measurement mode the unit always has an offset of up to
+/-2E-010 after auto-cal when feeding the same 10MHz to the (A) input and to
the
external reference. It should not have any offset of course.
Stanford says the
Hi
Definitely time to scrap the counter. To save you the excessive landfill
charge I'll take care of the disposal for you.
Unfortunately for my future disposal business, the answer to your question
is indeed, yes you can likely fix it yourself. The answer to the other
question is also yes, this
Stanford Research is a rip-off any way you turn. Their support ethic is
just crap.
YMMV,
-John
Hi guys,
need some help with a cal on my SR-620 counter.
In frequency measurement mode the unit always has an offset of up to
+/-2E-010 after auto-cal when feeding the same
From: Pete Lancashire p...@petelancashire.com
Subject: [time-nuts] was there ever a conclusion on distribution amps ?
I will soon have my 11 th piece of equipment that I want to feed 10
MHz (and some oldies 5 and 1).
What is the current though on making one's own distribution box ?
-pete
At 02:58 PM 2/23/2011, you wrote:
Did you copy it? or did you burn the image using ghost? Sorry for the
question, I just don't want to assume it's on there correctly.
I used Ghost to burn the image using Ghost32.exe from you web site.
Joe
d
Hi Bob, John,
Yeah, getting a we take $500 no matter if we fix the issue or not
response is not what I had hoped for..
I don't have the time to learn about and tweak registers myself
unfortunately, but at least there seems to be some hope now that this can be
improved..
bye,
Said
I tested it before posting and it did work for me. I'm no longer setup for
doing this again though. Your CF card should be able to boot (at least
partially) in your PC assuming you're using a IDE - CF adapter like I
had. Try burning the image again. If it still doesn't work and if another
The point is that SRS customer support is a sham. It might be OK for a
Fortune 100 customer or National Lab, but they clearly do not want or care
about support for anybody else.
If their attitude is screw you, I believe in returning the favor.
Companies like HP generally make most support
Hi
My offer to take it to the land fill for you still stands.
They are indeed unique counters. We have a mix of different brands and
models. It's rare to find anybody who actually prefers the SR620.
Bob
On Feb 23, 2011, at 8:09 PM, saidj...@aol.com wrote:
Hi Bob, John,
Yeah, getting a
Hi
SRS is a tiny little outfit making a handful of niche products. I'm amazed they
can make what they do, let alone support any of it. Rather than product lines
they have something here and something else over there. Very hard to train
people on.
That's not to excuse any of this, it just is
Sorry Bob,
That does not wash.
They already have HC manuals with schematics.
Dave at ArtekMedia is small too. If he can scan a manual and put it
on-line for $25, so can SRS. And SRS probably already has it as a .pdf.
As the the trade secret rubrick, it's nonsense. If some Chinese outfit
wanted
HI
Simply put - they are so small they have to make money any way they can. Their
setup is not very efficient. That leads to high costs and trouble on the
balance sheet.
Bob
On Feb 23, 2011, at 9:11 PM, J. Forster wrote:
Sorry Bob,
That does not wash.
They already have HC manuals with
I look forward to their demise then. Then Artek can make available what
SRS won't.
Pissing off users is not the way to attract more.
YMMV,
-John
HI
Simply put - they are so small they have to make money any way they can.
Their setup is not very efficient. That leads to
At 07:13 PM 2/23/2011, you wrote:
I tested it before posting and it did work for me. I'm no longer setup for
doing this again though. Your CF card should be able to boot (at least
partially) in your PC assuming you're using a IDE - CF adapter like I
had. Try burning the image again. If it
Having done some early prototype testing on this upcoming amplifier (no
financial involvement) I'll suggest that it may be worth waiting for. The
isolation at 10 MHz is better than 90 dB, the PN floor is better than -170
dBc/Hz, and the cost will -- as usual for TAPR -- be much less than what
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