What is a DC Block?
A DC block is a passive device that’s used to prevent DC from crossing across the points between which it is connected while allowing the flow of RF signals. It …
How to fix a broken HackRF
One of the most common reported issues is a significant drop in signal level both in the receiver as well as the transmitter of the HackRF. In this post we …
Chaining Software-defined Radio accessories with a Bias Tee
Introduction The use of a bias tee was discussed in a couple of blog posts previously. The primary use of a bias tee in an SDR is to power a …
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A Primer on RF Filters for Software-defined Radio
An RF filter is a hardware device that is used to limit signals in certain frequency bands while allowing signals of interest at other frequencies to pass through. Filters are …
Software-defined Radios and Bias Tees
We wrote about Bias Tees and their applications within the context of Software-defined Radios in a previous post. The primary use of a bias tee in SDR is to enable …
How Not to Break your Software-defined Radio (SDR) Hardware – Part 2
In Part 1 of this article, we covered RF-related precautions on the transmit and receive sections of a Software-defined Radio. In this article we will cover other precautions including Mechanical …
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How Not to Break your Software-defined Radio (SDR) Hardware – Part 1
Software-defined radio (SDR) can be easily damaged if proper care is not taken during use. In part one of this article series, let’s take a look at the most important …
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What is a Bias Tee?
A bias tee is one of the most useful Software-defined Radio (SDR) accessories you have likely never heard of. When receiving signals using a SDR, we have written about the …
What is Software-defined Radio used for?
Software-defined Radio technologies have become increasingly accessible these days with low-cost devices ranging in price between $20 and $300 and offering varying levels of performance. Here is a list describing …
Should I place a Low Noise Amplifier Before or After a Filter?
Most Software-defined Radios operate over a large frequency range. The RTL-SDR for instance can operate from 500 kHz to 1.7 GHz while the HackRF can operate from 1 MHz to …
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