HP 8566B Spectrum Analyzer “YTO unlock” repair

Kerry Wong did a repair of an HP 8566B Spectrum Analyzer “YTO unlock” and documented the repair process on his blog: While I was making a video on how to use HP 8671A as the frequency reference for an improved version of my simple DIY tracking generator for my HP 8566B spectrum analyzer, my spectrum […]

Teardown, repair and analysis of an Agilent E4443A 3Hz – 6.7GHz PSA series Spectrum Analyzer

Teardown, repair and analysis of an Agilent E4443A 3Hz – 6.7GHz PSA series Spectrum Analyzer from The Signal Path: In this episode Shahriar repairs an Agilent PSA Series Spectrum Analyzer. The instrument generates many errors during self-alignment and produces no measurements below 3.2GHz. The block diagram of the unit is thoroughly presented and various possible […]

Teardown and experiments with a Doppler microwave transceiver

Kerry Wong did a teardown of Microsemi’s C900502 X-band planar transceiver: I got a couple of Microsemi’s C900502 10.525 GHz X-band Doppler radar motion sensors a while ago. This batch was made in UK and had “UK patents 2243495 and/or 2253108 apply” printed on the case. I have seen a teardown of an HB100 Doppler […]

Teardown, experiments and calibration of an Ist-Rees laser spectrum analyzer

Ist-Rees laser spectrum analyzer teardown from The Signal Path: In this short episode Shahriar takes a close look at an Ist-Rees laser spectrum analyzer. This simple instrument is based on a continuously rotating diffraction mirror to detect various wavelengths. A trigger signal is used to denote the beginning of the scan and the front-panel display shows […]

Software Spectrum Analyzer for the Rigol 1000 series oscilloscopes

rheslip writes: I came up with this idea after seeing Farhan Ashar’s spectrum analyzer design which uses some of the same bits and pieces I used in the Simple Scalar Network Analyzer. Farhan’s is a classic heterodyne SA design – the addition of mixers and filters in front of the power detector makes the analyzer […]

Specan, a reboot of the W7ZOI/K7TAU spectrum analyzer

Ashhar Farhan blogged about his spectrum analyzer build: The Specan is actually a very simple but robustly built receiver. it is, in essence, a double conversion superhet receiver with 112 Mhz and 12 Mhz Intermediate frequencies. The first mixer uses an Si570 as the local oscillator. The second oscillator is a crystal controlled at 100 […]

Tektronix RSA306 IF frequency verification

KF5OBS writes: After posting the teardown video of the Tektronix RSA306 USB 3.0 Spectrum Analyzer on my YouTube channel, someone asked me to verify that the IF sampled by the Linear Technology 14-Bit / 125 Msps ADC is really at 140 MHz. Using the Tektronix MDO4104B-6 and a passive RF probe, I gladly did so.

Modularized homebrew spectrum analyzer

Mathias Weyland writes, I’m building a homebrew spectrum analyzer (based on an existing project) and while doing so, I used the Open Bench Logic Sniffer to test my logic board. I have documented my attempts here; the Logic Analyzer part starts around minute 21. The video makes most sense in conjunction with the second video, […]

RTL-SDR wide spectrum analyzer

Claudio Giuliani has designed an RTL-SDR based wide spectrum analyzer. The code is available on AlterVista. Software prerequisites are a Linux box (no Windows/OSX version) with Gnuradio and rtl_sdr utilities installed. The spectrum analyzer program is a frontend GUI of rtl_power for spectrum visualization and control and is coded in Basic for Gambas (a sort […]

Measuring filter response using a noise source

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 a useful tool for determining […]

RTL-SDR spectrum analyzer on the Beaglebone

Alexandru Csete, amateur radio operator OZ9AEC, has developed this spectrum analyzer running on a Beaglebone dev board. He calls the project the rtlizer, designed to be a simple real-time spectrum analyzer that uses an RTL2832U DVB-T receiver (RTL-SDR USB stick) and runs on a Beaglebone, or any other device with librtlsdr and Gtk+ installed. You […]

TI debuts sub-GHz CC430 based spectrum analyzer

video platformvideo managementvideo solutionsvideo player TI has introduced a sub-GHz spectrum analyzer using the SA430 chip. Known as the MSP-SA430-SUB1GHZ, the CC430 microcontroller that the SA430 is based on is a highly integrated system-on-chip featuring an on-board sub-GHz radio chip based on the CC1101. As TI describes it: The MSP-SA430-SUB1GHZ Spectrum Analyzer is a CC430-based […]

Arduino realtime audio spectrum analyzer

Paul Bishop has posted source code and the schematic for an audio spectrum analyzer based on the Atmega328/Arduino. The design takes input from a simple electret microphone, amplifies it through a transistor fed into the Arduino’s ADC input pin. The Arduino outputs video of  a 64 band audio spectrum analyzer through two external resistors which […]