Архив за 27.08.2018

Comment on KerberosSDR Running RF Direction Finding on a Tinkerboard by Timmy

There is an onboard 4 port USB hub chip.

Similar, but with a common clock shared between all tuners and the RTL2832u (ADC->USB)

I agree with that the 4 USB ports and the Ethernet port on the left hand side of the image is from the TinkerBoard, I’m about 99.99% sure that it is not a hat board. At the bottom of the board near the middle is a micro-USB cable.leaving the KerberosSDR it goes out of frame and is plugged into the TinkerBoard (bottom left of the image).

Comment on KerberosSDR Running RF Direction Finding on a Tinkerboard by LamaBleu

Hi Timmy.
Yes 4 SDR’s on one board but using the same USB port to communicate with host computer ?
Watching the picture, even searching and google, I’m not 100% sure to understand. Looks like a SDRx from outernet with 4 tuners.
I think the USB ports shown are from a TinkerBoard connected to the KerberosSDR acting as a hat ??

Comment on KerberosSDR Running RF Direction Finding on a Tinkerboard by Timmy

If you look at the image of the PCB above there are four metal shields, under each one of those cans is a R820T2 tuner and, outside and below are four RTL2832u USB 2.0 interface chips (which provide the ADC). That is basically the guts of four RTL-SDR devices. There are other parts like four LDO voltage regulators, a Zener diode avalanche white noise generator that can be switched in as a signal source for synchronisation, and a four port USB hub.

So anyhow at the end of the day the KerberosSDR can be treated exactly like four standard RTL-SDR sticks, with a nice clean power from four individual Low Drop Out linear regulators.

I do not see any reason at all why a single KerberosSDR can not offer excellent performance for trunk scanning apps like unitracker if treated as one, two, three or four individual RTL-SDR devices. But the photo is not clear enough photo to tell if there is a Bias-T, on any port, I suspect that there is not because the power budget is already pretty tight, but it depends on how the device is powered and how many GPIO pins are spare, but my gut feeling is that there is no Bias-T, which is not a big deal, but I could be wrong.

Comment on KerberosSDR Preview: A 4x Coherent RTL-SDR for Direction Finding, Passive Radar and more by John Scherer

This would be a fun application! Reminded me of a paper I saw some time back about passive radar imaging of meteor trails. I had to go dig it up!

https://www.haystack.mit.edu/edu/reu/2013/files/2013_SohbatzadehPresentation.pdf

And This one on Hackaday: https://hackaday.com/2015/06/05/building-your-own-sdr-based-passive-radar-on-a-shoestring/

Comment on KerberosSDR Preview: A 4x Coherent RTL-SDR for Direction Finding, Passive Radar and more by John Scherer

This would be a fun application! Reminded me of a paper I saw some time back about passive radar imaging of meteor trails. I had to go dig it up!

https://www.haystack.mit.edu/edu/reu/2013/files/2013_SohbatzadehPresentation.pdf

Comment on KerberosSDR Running RF Direction Finding on a Tinkerboard by John Scherer

While maybe not quite as fun as passive radar, would it be a fair assumption that this might also work with trunk scanning apps like unitracker?

Other SDR Devices • Remote VLF receiver with soundcard and pc

Hi, i have a good but obsolete Sound Blaster Audigy SB0090 24bit (PCI) and i would like to make a VLF receiver installing it on an old pc running Windows XP to receive from remote.
What is the software needed?
Will Spy Server run on XP? and will it work with a sound card?
What solution do you suggest?

Statistics: Posted by m_a_x — Mon Aug 27, 2018 6:21 pm


Comment on An Opensource Mini-Whip Antenna and Upconverter Design for RTL-SDRs by John

The J310 is getting a bit expensive these days, I have tried a 2N5486 which works just the same and is much cheaper ($0.98)

Moxon Pair Antenna for VHF satelite reception

submitted by /u/machsFuel
[link] [comments]

Comment on KerberosSDR Running RF Direction Finding on a Tinkerboard by Tetra

is a web interface for controlling the complete kerberosSDR possible ?

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