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Ham Radio/SDR 7000DLE/Anan/IC-7300/Icom/PowerSDR/SDR February 6, 2019

Anan7000/HPSDR and Icom IC-7300 S-Meter Calibration

I've noticed that my SDR setup, an Apache Labs Anan-7000DLE transceiver used with the PowerSDR software, seems to rest the S-Meter at a quite high level when there is no signal present. This is unnerving when I try to compare…

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Rapsberry Pi/SDR OP25/RTL-SDR/Scanner March 18, 2018March 18, 2018

Add streaming audio to OP25 RPi scanner

Thanks to Graham Norbury, here is how to set up a Raspberry Pi OP25 scanner to stream audio to an icecast or other streaming server. I have updated my plug-and-play op25-rpi.img image at http://febo.com/os_images/ to include this capability (look for…

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Ham Radio/Red Pitaya/SDR/Solar Eclipse/TAPR Projects February 16, 2018February 18, 2018

Thoughts on a Wideband SDR Recording Tool

As part of the HamSci Solar Eclipse experiment, I recorded wideband data from my SDRs on the theory that capturing the data for later study might be more productive (and less stressful) than trying to do measurements in real time.…

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SDR OP25/P25/Raspberry Pi/SDR February 12, 2018

Update on Update on P25 Scanner

Since my updated post on building a P25 trunking scanner with a Raspberry Pi and an RTL-SDR dongle, I've created a copy-and-play image file that gets you up and running in minutes. I've put it (along with a couple of…

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Ham Radio/SDR/Test and Lab Equipment January 24, 2018

RTL-SDR.com Dongle Measurements (Part 2 — Results)

In Part 1 I described some background about SDR dynamic range as an introduction to the measurements I did on a RTL-SDR.com v3 USB "dongle" SDR. Now for the results. I wrote a Gnu Radio program to help measure the…

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Ham Radio/SDR/Test and Lab Equipment dongle/RTL-SDR/SDR January 24, 2018January 24, 2018

RTL-SDR.com Dongle Measurements (Part 1 — background)

I'm using several USB "dongle" SDR sticks from RTL-SDR.com. These nifty $20 devices can receive from 100 kHz to above 1700 MHz. They have a low noise amplifier in the front end that is adjustable from 0 to about 50…

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SDR P25/Scanner/SDR/Trunking November 6, 2017November 7, 2017

Update on P25 scanner — new version, and new installation instructions

Since I posted my original articles on configuring the Gnuradio-based op25 P25 trunking scanner, there's been a lot of progress in the code. In particular, there is a new fork that changes the program to a command-line version, which saves…

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Ham Radio/SDR/Solar Eclipse Elipse/HPSDR September 2, 2017September 2, 2017

Eclipse — 80M Waterfall

Here's a waterfall showing the 80M CW band from a bit after 1600 UTC (noon) and 2000 UTC (4:00PM EDT) on eclipse day. There was clearly enhanced propagation for about an hour, starting ~15 minutes before the local maximum (73%…

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Ham Radio/SDR/Solar Eclipse/Test and Lab Equipment/Time and Frequency Beaver Island/eclipse/SDR August 30, 2017August 31, 2017

More Solar Eclipse Analysis (HF Propagation)

I've continued processing the data generated from software-defined-radio recordings I made during the 2017 solar eclipse at my fairly isolated and low-RF-noise location on Beaver Island, Michigan (45 38 38 N, 85 29 24 W, grid square EN75gp). The nearest…

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SDR/Solar Eclipse/Test and Lab Equipment/Time and Frequency Beaver Island/eclipse/SDR August 27, 2017August 31, 2017

First data from Solar Eclipse 2017

I set up a smaller version of my mad-scientist stuff at our cottage on Beaver Island, Michigan (45 38 38 N, 85 29 24 W, grid square EN75gp), to record the RF spectrum before, during, and after the eclipse on…

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