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Posts Tagged ‘radio frequency’

VHF Frequency Counter with PC Interface

Wednesday, September 7th, 2016

Scott has published a new build: This is the general idea behind how this frequency counter works. It’s so simple! It’s entirely digital, and needs very few passive components. sn74lv8154 is configured in 32-bit mode (by chaining together its two 16-bit counters, see the datasheet for details) and acts as...

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Posted in RF | No Comments »

Breadboard line driver module

Tuesday, August 23rd, 2016

Scott from SWHarden has published a new build: Line driver chips are one of my go-tos for quickly amplifying digital signals because they’re so fast to drop in a breadboard and they provide a strong output with very high impedance inputs and need no external components. Individual buffer of the...

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Posted in DIY, RF | No Comments »

14 GHz Ku Band Block UpConverter

Thursday, December 3rd, 2015

Sebastian (a.k.a KF5OBS) writes,  "A quick look at what it takes to make a Block UpConverter (BUC) for the 14 GHz Ku-Band satellite uplink band work. A BUC is used in professional Broadcast TV environments to convert a video signal from a L-Band intermediate frequency to the 14 GHz range...

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Posted in RF | No Comments »

Measuring filter response using a noise source

Thursday, January 30th, 2014

KF5OBS writes: If you own a spectrum analyzer with tracking generator or, even better, a good vector network analyzer, measuring the frequency response of a filter is fairly easy. But there is one old approach using a noise source that can turn any oscilloscope with a FFT spectrum view into...

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Posted in measurement | 2 Comments »

App note: RF Layout with Microstrip

Saturday, May 11th, 2013

Here’s an application note from Atmel on microstrip layout techniques to get optimal RF performance from wireless ICs (PDF!) : Poor layout can seriously degrade wireless performance. This application note outlines practical microstrip layout techniques to connect wireless microcontrollers with baluns and antennas. Unbalanced and balanced (differential) microstrip techniques are...

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Posted in app notes | 1 Comment »

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