Hi
It's unclear exactly what they did. My *guess* is:
1) They fire up the GPS and get it doing it's thing
2) They lock up the XO and get it into on time / on frequency status
3) They use the XO signal to zero out the offset in the Rb
Again, that's just a guess.
There are later versions where
A few of these are currently on eBay at pretty low prices. I have
never heard of them and was wondering if anyone here has had any
experience with them or knows where some information might be found.
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Hi
It's been a long time since I've tried this, but the Iceland chain was a
reasonable catch from the central US with an Austron 2100 and the standard
supplied whip antenna. Reception was ok at night and useless during the
day. As I recall the signal was well above ( 20 db) the rated floor of the
???
Both my Austron 2100Fs have Austron loops.
-John
Hi
It's been a long time since I've tried this, but the Iceland chain was a
reasonable catch from the central US with an Austron 2100 and the standard
supplied whip antenna. Reception was ok at night and useless during
In message 61515.12.6.201.2.1292262311.squir...@popaccts.quikus.com, J. Fors
ter writes:
Relative to the old Iceland chain, the new 4-digit GRI's should be
more immune to noise because 1kHz raster signals average out.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org
Hi
The one we had used a whip mounted to a preamp. The antenna was a separate
line item on the PO, so you could pick which ever one you wanted to use. We
wanted to sync to multiple chains, so the omni directional whip made sense.
Never had an Austron loop, so I can't say which one was the better
Hi
Certainly more immune to synchronous noise like RFI from switching power
supplies. I haven't checked the ERP numbers on the chains. There may be some
differences there. Some of the Asian chains used to pump out a *lot* of
power.
Bob
-Original Message-
From:
Has anyone seen or used these 10Mhz oscillators. $20 shipped seems a
reasonable price.
It's an un-used Motorola part. Maybe there is something better?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=280567398921ssPageName=STRK:MEWAX:IT
I want to use them in a portable (battery powered) freq
I have one of these same exact modules which I purchased to use as a
TXCO that I could then lock to an external standard in an HP Agilent
5314A Universal counter. My project hasn't moved beyond a very
preliminary planning stage at the moment pending some more information
on the device.
I haven't
I looked at them awhile and passed.
For 45$ and maybe S/H I can get an ovenized xtal oscillator ISOTEMP OCXO
that is probably 3+ orders of magnitude better in accuracy/stability.
Good at 12V DC also. Some with voltage control requiring only an
external pot
for fine tuning.
So a search on
On Mon, Dec 13, 2010 at 10:56 AM, Stan, W1LE stanw...@verizon.net wrote:
For 45$ and maybe S/H I can get an ovenized xtal oscillator ISOTEMP OCXO
that is probably 3+ orders of magnitude better in accuracy/stability.
Good at 12V DC also. Some with voltage control requiring only an external
How
Chris Albertson wrote:
2) Look at the developer documentation for Mac OSX's quartz graphic system.
Very loosely, what you do is open a contex and then send PDF drawing
comands to it.
This can be directed to the screen of a file. The same is true of
IOS devices like
the iPad or iPod touch.
The ISO TEMP ovens we have experience with draw 20-40ma for the oscillator and
a couple hundred or so MA on oven start up, generally decreasing to 80 ma or so
when the oven is at temp. Often the oven will be 28V and the oscillator will be
15V, although +5V oscillator and +12V oven examples are
My portable battery is 12V at ~15 amp hours. it is good for the weekend
of a ham radio contest
from Friday's calibration/tweaking thru Sunday night.
The OCXO stays powered up all weekend on its dedicated battery.
I do not have hot/cold current draw in front of me, but as I recall is
100-200
Fellow time-nuts,
A quick question to settle my curiosity...
Which mobile application uses 15 MHz?
I know that GSM uses 13 MHz, but I can't recall which one uses 15 MHz.
I'd be happy if someone would care to enlighten me.
We have also seen 19,6608 MHZ being in use, and recently seen a
Lucent Cell phone site GPSDO output 15 Mhz.
Stanley
- Original Message
From: Magnus Danielson mag...@rubidium.dyndns.org
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Mon, December 13, 2010 6:10:14 PM
Subject: [time-nuts] Where 15 MHz?
Fellow
On 12/14/2010 01:24 AM, Stanley Reynolds wrote:
Lucent Cell phone site GPSDO output 15 Mhz.
Yes, that I already know, but for what kind of equipment was it meant?
Cheers,
Magnus
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Looking at the age of some of it started with analog continued with TDMA and or
CDMA not sure if it is still in use. Maybe analog used the non GPS stuff as the
oldest was RB and XO but not GPS.
Stanley
- Original Message
From: Magnus Danielson mag...@rubidium.dyndns.org
To:
Oh yes I would agree
On Sun, Dec 12, 2010 at 8:24 PM, WB6BNQ wb6...@cox.net wrote:
For sure,
The problem was not in the downloading. The real problem was in trying to
read the damn thing as
it gave my one cell brain a serious headache.
BillWB6BNQ
paul swed wrote:
Thanks for the
Kind of went quite
On Thu, Dec 9, 2010 at 6:53 PM, Dabney Crump dab...@dhcrump.com wrote:
Hi Robert,
Yes, its for the 10kHz output.
Basically the units will be part of a set of timing computers that will be
used at
fixed locations to measure time intervals.
That's very fast, how did you
Hi All,
I don't suppose anyone found any of the Jupiter units over the weekend?
Thanks - Dabney
On 12/13/2010 06:23 PM, paul swed wrote:
Kind of went quite
On Thu, Dec 9, 2010 at 6:53 PM, Dabney Crumpdab...@dhcrump.com wrote:
Hi Robert,
Yes, its for the 10kHz output.
Basically the units
Hi
It turns out that 15 MHz x N (I forget the N) makes a nice LO in the 900 MHz
range for an base station. That's what drove the choice of 15 over 5 or 10
MHz. I believe there was a bit of the all frequencies are equally cheap in
your volumes sales pitch involved as well.
Bob
On Dec 13,
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