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Category: SDR

PowerPole Color Conventions

October 5, 2019 n8ur Leave a comment

A lot of us use Anderson PowerPole connectors for DC power distribution. There’s a nearly universal standard to use red…

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Posted in: General, Ham Radio, SDR, Test and Lab Equipment, Time and Frequency Filed under: Cabling, DC Power, PowerPole, Wiring

Peak vs. Average Power in Complex Waveforms (and Gnuradio)

March 14, 2019 n8ur Leave a comment

One of my Gnuradio projects is a tool that records IQ data covering 375 kHz — which is enough to…

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Posted in: Ham Radio, SDR Filed under: FieldFox, Gnuradio, HamSci, USRP

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

February 6, 2019 n8ur 2 Comments

I’ve noticed that my SDR setup, an Apache Labs Anan-7000DLE transceiver used with the PowerSDR software, seems to rest the…

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Posted in: Ham Radio, SDR Filed under: 7000DLE, Anan, IC-7300, Icom, PowerSDR, SDR

Add streaming audio to OP25 RPi scanner

March 18, 2018 n8ur 5 Comments

Thanks to Graham Norbury, here is how to set up a Raspberry Pi OP25 scanner to stream audio to an…

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Posted in: Rapsberry Pi, SDR Filed under: OP25, RTL-SDR, Scanner

Thoughts on a Wideband SDR Recording Tool

February 16, 2018 n8ur 1 Comment

As part of the HamSci Solar Eclipse experiment, I recorded wideband data from my SDRs on the theory that capturing…

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Posted in: Ham Radio, Red Pitaya, SDR, Solar Eclipse, TAPR Projects

Update on Update on P25 Scanner

February 12, 2018 n8ur 31 Comments

Since my updated post on building a P25 trunking scanner with a Raspberry Pi and an RTL-SDR dongle, I’ve created…

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Posted in: SDR Filed under: OP25, P25, Raspberry Pi, SDR

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

January 24, 2018 n8ur 1 Comment

In Part 1 I described some background about SDR dynamic range as an introduction to the measurements I did on…

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Posted in: Ham Radio, SDR, Test and Lab Equipment

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

n8ur 1 Comment

I’m using several USB “dongle” SDR sticks from RTL-SDR.com. These nifty $20 devices can receive from 100 kHz to above…

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Posted in: Ham Radio, SDR, Test and Lab Equipment Filed under: dongle, RTL-SDR, SDR

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

November 6, 2017 n8ur 8 Comments

Since I posted my original articles on configuring the Gnuradio-based op25 P25 trunking scanner, there’s been a lot of progress…

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Posted in: SDR Filed under: P25, Scanner, SDR, Trunking

Eclipse — 80M Waterfall

September 2, 2017 n8ur Leave a comment

Here’s a waterfall showing the 80M CW band from a bit after 1600 UTC (noon) and 2000 UTC (4:00PM EDT)…

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Posted in: Ham Radio, SDR, Solar Eclipse Filed under: Elipse, HPSDR

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