Hello Andrea,
The angle could be found with a directional antenna or inerferometry, but about
the distance?
About the only reliable way to locate hidden transmitters is by field
strength. The problem in built-up areas is reflections.
At one time Doppler DF systems were popular, but anybody
Most crystals are cut to be terminated with a certain capacitance.
If you adjust this capacitance you can vary the frequency slightly.
However if you terminate the crystal with a series tuned circuit (LC)
you can vary the reactance over a much wider range, and consequently get
a wider
I would assume that using two voltage regulators will spread the load.
For the AD9851 I'am planning to put external radiator glued on top of
it.
One of my commercial projects used eight x AD9852. During development
they definitely needed small heat sinks glued on top of each chip.
I
My versions of a DDS using two AD9910 in Quadrature
http://members.wideband.net.au/gzimmer/QuadDDS/default.html
regards ... Zm
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Unless it’s already on a board, this is not a simple chip to use in a home
environment.
Nevertheless, some of us do manage.
But it's true, the AD9852/AD9854 does run very hot.
It's worth mentioning that the AD9910/AD9912 family runs much cooler.
Mine aren't even warm to the touch. This of
http://www.hp.com/hpinfo/abouthp/histnfacts/publications/measure/pdf/1968_09.pdf
This broken link business is very common in some browsers (in Windows).
It's because there's an underline in the original URL. When the browser
sees a link it underlines it in blue, which converts the
One of the simplest ways to receive VLF signals is to buy a surplus
Selective Level Meter.
They were an important piece of test equipment used by the analog
line-line telephony people. Now of course, surplus to requirements.
If you hunt around they can be found at very low prices.
Several years ago I spotted a clever PIC-based software (DSP-ish)
approach to WWVB modulation
Perhaps it was mine?
Years ago I designed a PSK31 decoder using a PIC. It worked very well
for fixed frequencies, but I concluded that making it tunable was beyond
the resources of the PICs then
I have a Kenwood TS-940S transceiver that can receive 60 kHz but I have never
heard anything
Where are you? It must be deaf as a post.
I can hear WWVB in Australia !
(or at least I could till JJY-60 started in 2001)
... Zim
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What's the best way to open an OCXO in the typical solder-sealed tinned
steel can?
Use a high wattage iron to melt the solder at one point, prise the gap
open with a flat screwdriver, then work along the join.
Solder is soft. so once you get it started you should be able to roll it
open
9.8304 MHz output, an odd frequency used by the cell tower equipment
9.8304 MHz is 8 x 1.2288 MHz which is the CDMA PN chip rate
a rather fundamental frequency to the CDMA phone system
Zim
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An electro-mechanical RX for VLF.
http://www.wireless.org.uk/mechrx.htm
enjoy
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Ignatio,
Not exactly what you have asked, but I notice that Trimble Tboltmon
won't connect to a device which requires Odd parity.
You can select Odd parity, but it fails to connect, and the details at
the bottom remain fixed at N,8,1
So for Odd parity I can only use Trimble Studio. I
Hi folks,
I have my little Trimble Resolution SMTx GPS module running.
Details at:
http://members.wideband.net.au/gzimmer/Time/default.html
later ... Zim
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Did you mean 2.01.6 or is there a newer version?
Version 2.01.6 is the latest version I've seen.
It's the first which drops the beta label.
... Zim
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Folks,
Nigel GM8PZR explained all this very thoroughly a few days ago...
It seem there are more than one development thread of Thrimble Studio
running. I've seen at least three versions.
This link gives you version V1.23.0 11/20/2013 (status beta)
Hi Dave,
That link to mmnt.net resulted in some strange russian gaming site
Yes, somehow I posted the wrong link. It should have been:
ftp://ftp.trimble.com/pub/sct/misc/bin/TrimbleStudio
I don't see any difference in the V1.23.0.0 and the V2.01.6
Try the update function in Help. On mine it
Hi Brian,
Thanks for the fascinating story!
For that matter, is anyone running one of the new multi-system receivers?
I hope to play with Resolution SMT GG which is the Multi-GNSS version of
the Desolution SMT.
What I'm keen to find out is which of the standard GPS diagnostic
software
On 12/12/2013 10:57 AM, Russ Ramirez wrote:
FYI, in case anyone should be interested. $20
http://www.goldmine-elec-products.com/prodinfo.asp?number=G19738
Motorola GCNT20A3A +25db Antenna.
For what it's worth, I purchased one of these and it eventually arrived
after a rather round-about
Hi Chris,
I see occasional references to Trimble Studio here.
What is it please?
For a list of features, see:
http://www.wavedigm.com/xe/studio
That page also has a Users Guide and the application itself.
regards Zim
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Hi folks,
This has probably been covered before, but I thought it worth knowing
I wanted to use my new laptop with my Trimble/Nortel GSP receiver.
As my laptop doesn't have an RS-232 port, I purchased a cheap USB to
RS-232 adaptor.
After a few false starts I found that the older Tboltmon
Sorry, that doesn't make much sense, does it...
I just realised that TrimbleStudio is not just USB.
It runs quiet happily with RS-232
. Zim
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Interesting discussion re getting the 1PPS into a PC to synchronise a
timing program.
I use WSPR for ham radio and was wondering how to do this.
Can you tell me which (Windows) time synch programs can use the 1PPS on
DCD of the RS232 interface please?
Next step would be to build a variable
Can you tell me which (Windows) time synch programs can use the 1PPS
on DCD of the RS232 interface please?
To answer my own question:
Here's one...
http://www.visualgps.net/NMEATime/default.htm
There are a few others listed at
http://www.gpskit.nl/links-en.htm
Zim
Unless you bring the 1pps in and synchronize with that, you are
probably better off just running NTP.
Yes, that is the idea.
I often don't have access to the Internet when running WSPR.
eg when operating portable in remote areas or marine.
Thanks . Zim
Hi Anders,
Have a look at my AD9910 quadrature DDS
http://members.wideband.net.au/gzimmer/QuadDDS/default.html
I used a Crystek 1GHz SAW oscillator
regards Zim
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Hi Dave,
Thanks for your post.
I'd like to see some of your LH traces if you don't mind...
Do you mean with the Lady Heather software?
I'll leave it running a while and collect some data.
Yes, I did hesitate running it on AC, but it draws little current and
does seem to be happy enough.
Hi Folks,
I though you might be interested in a couple of my recent projects...
I purchased a Trimble/Nortel 45000 GPS Locked Reference Oscillator board
on ebay
and used it to drive my Silicon Chip Magazine High Resolution Frequency
Counter.
Details at
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