Архив за 26.07.2018

GSM Heatmap Project

Following a GSM heatmap using SDR Project (https://www.reddit.com/r/RTLSDR/comments/2hbjyt/gsm_heatmap_using_rtlsdr/) and I'm having trouble with rtlsdr-scanner. I don't see the "enable GPS logging" as mentioned from their GPS guide (https://eartoearoak.com/news/rtlsdr-scanner-gps) and clicking on "export map" isn't an option. ANyone know why?

THanks!

submitted by /u/ponytailfairytale
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Comment on New SDR# Audio Waterfall Plugin by Alan

Uploaded latest build to https://bit.ly/2NNanod

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

Ok, here I am “publishing” a study anyone can reproduce.
Setup 1 is a vertical 24AWG wire going up along a 30ft fiberglass pole. There is a 8ft ground rod near the base of the pole. The wire and the ground are connected to a 1:1 transformer (4 turns bifillar on BN43-202 binocular ferrite core). The other side of the transformer is connected to coax going to the shack. The coax shield is also tied to the ground rod.
Setup 2 is a mini-whip mounted on top of the same pole. The coax from the mini-whip is connected at the base to the coax going to the shack, without the transformer, but with the shield grounded at the base to the same rod.
I claim that there is no observable difference in the S/N ratio of these 2 setups. Prove me wrong.
For completeness, setup 3: FT-817 radio on the asphalt shingle / wood frame house roof, 6m up, connected to a battery supplied mini-whip with a 1ft piece of coax. No connection to any kind of ground. This setup can only receive the strongest signals and is basically unusable. I claim (and mini-whip proponents don’t deny) that mini-whip REQUIRES a long vertical feedline grounded at the base to work at all.

Meteor M2 — 07/26/18

Meteor M2 - 07/26/18 submitted by /u/jeffreypkelly
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Comment on PlutoWeb: Custom firmware for the PlutoSDR that enables you to Run OpenWebRX, dump1090 etc directly on the device by Timmy

On paper it should be possible, but it would not my direction of choice. FYI: I don’t own a PlutoSDR.
1 install the Analog Devices windows IIO driver (PlutoSDR-M2k-USB-Drivers)
2 Install gnuradio on windows (can be done via the PothosSDR binaries for windows which include it with Soapy)
3 configure Soapy to see the PlutoSDR (SoapySDRUtil –find or SoapySDRUtil –probe=”driver=plutosdr”)
4 Use all the preexisting gnuradio “Digital Television/ATSC” blocks to do whatever you want with ATSC, but you will probably need a ts file (search for “transport stream test patterns” in your search engine of choice) for an easy beginning.

Hint: access it with soapy via: driver=plutosdr,hostname=192.168.2.1 or just driver=plutosdr if it is at the default IP address.

Comment on PlutoWeb: Custom firmware for the PlutoSDR that enables you to Run OpenWebRX, dump1090 etc directly on the device by unixpunk

There are resources online to help with flashing the pluto, that’s beyond the scope of the project and I suspect these comments. Flash all the files in order and you should be set then. You should still be able to get to DFU mode again by holding the reset button and applying power.

Comment on PlutoWeb: Custom firmware for the PlutoSDR that enables you to Run OpenWebRX, dump1090 etc directly on the device by Bernd

I flashed the image and now have a bootloop.
im on latest firmware.

Comment on SDRSharp Users Guide by HarveyL

Is there any way of invoking SDR# in ‘play’ mode?
I’m running it on a remote machine so am not on site to click the ‘play’ triangle. I’m clicking it under s/ware control, but that’s not ideal as the computer is sometimes busy with updates etc.

Comment on PlutoWeb: Custom firmware for the PlutoSDR that enables you to Run OpenWebRX, dump1090 etc directly on the device by unixpunk

Also, thanks @admin for the post! I’m looking to add a how-to of exactly how I cross-compiled software and built the firmware in a post to rfoverride.com soon as well. I’ll drop you a note then if you’re interested.

Comment on PlutoWeb: Custom firmware for the PlutoSDR that enables you to Run OpenWebRX, dump1090 etc directly on the device by unixpunk

It is based around and runs on Linux, however Twitch (aka ImDroided) created the webUI to aid those who do not know Linux, this way you don’t need to SSH in and use the settings.sh file to change things around. You can also edit the config.txt on the USB mass storage device to change settings. In addition, there are ways in Windows to flash the PlutoSDR with a new firmware, so you could flash it and never use Linux while still using the features on the firmware.

Hope that helps!

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