Have you looked at the blitzortung.org system?
There may be some ideas to glean from that
On July 28, 2016 6:12:54 PM CDT, Jerome Blaha
wrote:
>Hi Guys,
>
>This is a little outside of time-nuts scope, but not by much. I'm
>interested in finding the time between two rising edges above a set
>th
You might be better off scanning than wide band. Even with a slow scanner you
can cover the entire RF range every few meters of car travel. But I would
sample as fast as you can. Hundreds of millions per second. This gives best
sensitivity and noise
Use gnu radio software and Their SDR radio
Hi Jerome,
This may or may not be of any help, but have you considered using several
RTL-SDR devices running at the same time? You'd need to use a common clock,
and probably a number of other enhancements. But, if you could pull it off,
you'd have a wideband RDF type of device. You'd probably
I have an Optoelectronics 3000A and as far as I know, the only thing
distinguishing this capability from any other frequency counter is
discrimination on the digital side which filters unstable counts. In
practice it operates like an FM receiver where the strongest signal
captures the input. If I
Hi Jerome:
Some time ago a company called Opto Electronics made a frequency counter with a small antenna that would count the
frequency of a nearby signal. They call these Near Field Receivers.
Some modern scanner radios incorporate some of these ideas.
http://www.prc68.com/I/BC125AT.html
--
Thank you all who responded including Bob, Attila, Vlad, Brooke, and Chris for
some great suggestions.
This is a fun side project of mine to passively detect RF emitters based upon
strongest nearby signal using ToA pulses from cheap log power sensors or
perhaps the Watson-Watt method. The hope
On Fri, 29 Jul 2016 09:23:02 -0700
Chris Albertson wrote:
> Sounds like you want to build something rather then use some
> instruments you can buy. I've thought a little about this too as I
> want to make a LIDAR to measure distance using a laser pulse. In my
> case I want both low cost and fo
Hi Jerome:
The Vietnam era Radar Warning Systems used 4 wide band antennas (nose, tail & wing tips) and displayed the bearing,
rough distance & threat type on a CRT.
Near the antenna was a crystal video receiver using a multi channel filter driving Schottky diode detectors. The output
from eac
Sounds like you want to build something rather then use some
instruments you can buy. I've thought a little about this too as I
want to make a LIDAR to measure distance using a laser pulse. In my
case I want both low cost and for the device to be very small and
light and run off a battery
I thi
May be some more accurate alternative to AD8302 could do that. AD8302
could measure Gain/Loss and Phase up to 2.7 GHz. I using one in my
project and its doing its job right (I think).
On 2016-07-28 19:12, Jerome Blaha wrote:
Hi Guys,
This is a little outside of time-nuts scope, but not by
On Thu, 28 Jul 2016 23:12:54 +
Jerome Blaha wrote:
> Hi Guys,
>
> This is a little outside of time-nuts scope, but not by much.
> I'm interested in finding the time between two rising edges above a set
> threshold with preferably nS or high ps timing accuracy. Can this be simply
> done wi
Taking a look for it also turned up a recent time-nuts thread
https://www.febo.com/pipermail/time-nuts/2016-May/097801.html
On Thursday, 28 July 2016, Scott Stobbe wrote:
> There was a pic app note on alternate uses for the cap sense block a while
> back, not sure it that it will push you into
Hi
If you have a need to do < 1 ns with a counter approach, the counter will need
to have a GHz clock in it. If you want to use an MCU counter, it will need to
have a GHz level clock routed to it. You are unlikely to find an MCU that will
do that. An FPGA can get you to 1.25 ns with direct coun
There was a pic app note on alternate uses for the cap sense block a while
back, not sure it that it will push you into the ps.
On Thursday, 28 July 2016, Jerome Blaha wrote:
> Hi Guys,
>
> This is a little outside of time-nuts scope, but not by much. I'm
> interested in finding the time betwee
Hi Guys,
This is a little outside of time-nuts scope, but not by much. I'm interested
in finding the time between two rising edges above a set threshold with
preferably nS or high ps timing accuracy. Can this be simply done with a few
programmed Microchip PICs or with a good short term OCXO c
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