El 30/08/2012 20:53, saidj...@aol.com escribió:
There are some drawbacks to this type of SC-cut MCXO I would think, and it
could possibly be replaced by a much higher performance Symmetricom CSAC,
probably at a lower cost and higher availability:
* Q-tech MCXO is ITAR controlled, CSAC is not
Hi
An SC is going to have it's temperature curve centered up around 95C or so. If
it's been cut as an OCXO crystal the turns will be up there as well. By the
time it gets to room temp, the delta F / delta T is moving mighty fast. Think
in terms of multiple ppm/C. A typical cell phone TCXO
I've bought an Agilent N9923A portable 2 MHz to 6 GHz vector network
analyzer which supports GPS. I assumed it had the GPS bought it, but
later found it it needs a GPS unit with a ublox chip set.
Are there any ones to avoid, or which are good?
Dave
Wow, an 8K dollars VNA... and you mind about a $60 GPS unit?
On Fri, Aug 31, 2012 at 9:13 PM, David Kirkby david.kir...@onetel.netwrote:
I've bought an Agilent N9923A portable 2 MHz to 6 GHz vector network
analyzer which supports GPS. I assumed it had the GPS bought it, but
later found it it
Dave,
that depends on which uBlox the unit supports. There are basically three
different sizes: AMY, LEA, and NEO. They also sell chip-sets, but only to
very large volume customers.
Any of the uBlox-6 will be excellent, the choice will depend on
form-factor, and also if you need a
Hi
Does it also need an add on board to mount the GPS on as well?
Bob
On Aug 31, 2012, at 3:13 PM, David Kirkby david.kir...@onetel.net wrote:
I've bought an Agilent N9923A portable 2 MHz to 6 GHz vector network
analyzer which supports GPS. I assumed it had the GPS bought it, but
later
On 31 August 2012 20:34, Azelio Boriani azelio.bori...@screen.it wrote:
Wow, an 8K dollars VNA... and you mind about a $60 GPS unit?
Well, as it is a portable device, I was hoping the GPS was built in
more for convenience than anything else. It's not the cost of the card
I am so worried about,
On 31 August 2012 20:35, saidj...@aol.com wrote:
Dave,
that depends on which uBlox the unit supports. There are basically three
different sizes: AMY, LEA, and NEO. They also sell chip-sets, but only to
very large volume customers.
It plugs in on USB. Somewhere I read it had to be ublox
Hi
Are you thinking of hooking up an external GPS to the unit? I've never seen one
of these VNA's so I'm a little in the dark.
Bob
On Aug 31, 2012, at 4:52 PM, David Kirkby david.kir...@onetel.net wrote:
On 31 August 2012 20:34, Azelio Boriani azelio.bori...@screen.it wrote:
Wow, an 8K
Hi
It's not a great receiver, but it works. Back when it first came out, the price
was pretty good for what you got. Time marches on and you now can get some very
good / very cheap stand alone units.
Bob
On Aug 31, 2012, at 5:03 PM, David Kirkby david.kir...@onetel.net wrote:
On 31 August
Some of those Microsoft hockey pucks used SIRF III chipset. I would check ebay
for that kind of USB GPS. Streets and Trips, well specifically using a notebook
for a display, has long been out of favor.
So I'm assuming here ST didn't use NEMA interface format.
-Original Message-
From:
On 31 August 2012 22:03, Bob Camp li...@rtty.us wrote:
Hi
Are you thinking of hooking up an external GPS to the unit? I've never seen
one of these VNA's so I'm a little in the dark.
Bob
The Agilent N9923A is a portable battery powered VNA to 4 or 6 GHz
(depening on what option you have.
On Aug 31, 2012, at 4:05 PM, David Kirkby david.kir...@onetel.net wrote:
I don't have it yet, but bought it on eBay today from the seller
agilentused which is Agilent, and sells used/ex-demo units which
have been reconditioned, and have a fully warranty. Since I have not
[...]
I bought my
In my opinion it uses the NMEA sentences. For the purpose of recording
position and time, the NMEA is enough and usually the GPSes receivers
output by default the NMEA sentences. Of course you can't discipline
anything by the USB port, so the external 10MHz is mandatory.
On Sat, Sep 1, 2012 at
I have a gps called ambicom with a usb that works with Msoft streets
directly.
Don
Bob Camp
Hi
It's not a great receiver, but it works. Back when it first came out,
the price was pretty good for what you got. Time marches on and you now
can get some very good / very cheap stand alone units.
These mapping programs tend to fall back to NEMA, but also have proprietary
formats. (Certainly true of Garmin and Delorme.) Now I wonder if by specifying
a ST USB GPS they want whatever proprietary format MS used. That is, it would
have made more sense that if they wanted NEMA, they would
On 8/31/12 7:06 AM, Bob Camp wrote:
Hi
An SC is going to have it's temperature curve centered up around 95C
or so. If it's been cut as an OCXO crystal the turns will be up there
as well. By the time it gets to room temp, the delta F / delta T is
moving mighty fast. Think in terms of multiple
You could get our GPSTCXO eval kit.
It has a uBlox gps, supports NMEA GGA and RMC messages, has on-board USB, and
outputs a disciplined 10MHz with reasonably good phase noise. Two flies
captured in one.
Probably costs only as much as shipping for your analyzer did :)
No idea if it will be
Hi
Ok, that gets you back to the basics of really major delta F / delta T slopes.
Bob
On Aug 31, 2012, at 8:55 PM, Jim Lux jim...@earthlink.net wrote:
On 8/31/12 7:06 AM, Bob Camp wrote:
Hi
An SC is going to have it's temperature curve centered up around 95C
or so. If it's been cut as an
On 8/31/12 7:16 PM, Bob Camp wrote:
Hi
Ok, that gets you back to the basics of really major delta F / delta T slopes.
Bob
yeah.. but as long as you know what the curve is.. the NCO has a huge
range (after all, we already have to tune over 500 kHz...a few hundred
Hz isn't a big deal.
A
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