Tag Archive for RF

Siglent SSA3032X 9kHz – 3.2GHz Spectrum Analyzer / TG Review, Teardown & Experiment

In this episode Shahriar presents a full teardown, analysis and review of the Siglent SSA3000X Series Spectrum Analyzer. Siglent’s SSA3000X family of spectrum analyzers offer a frequency range of 9 KHz to 2.1 GHz / 3.2 GHz. With their light weight, small size, and friendly user interface, the SSA3000s present a bright easy to read display, powerful and reliable automatic measurements, and plenty of impressive features. Applications are many, but include research and development, education, production, maintenance, and many more.

The review is organized as follows:

00:41 – Model comparison and overview.
03:56 – Full teardown and analysis of internal hardware.
17:38 – Initial performance assessment including tracking generator behavior.
29:50 – Antenna and diplexer measurements and characterization.
50:00 – Built-in applications overview and measurement personalities.
56:58 – PC interface software performance and overview.

Teardown & Repair of an Agilent 53152A 46GHz Microwave Frequency Counter

In this episode Shahriar investigates a faulty Agilent 53152A 46GHz frequency counter. The instrument does not power on and shows no sign of internal voltage presence. Teardown of the instrument reveals a large PCB where all analog and digital circuity is contained. The power supply module is a module components and upon measurements shows no activity.

The power supply is a simple switching architecture with functioning input rectifier and capacitor filter. By using an oscilloscope it is clear that the power supply PWM controller attempts to start. However, the main power supply pin shows unstable voltages indicating inadequate charge retention on the rectifying capacitor. Replacing the capacitor revives the startup condition and the power supply function returns. The PWM controller and main switching transistors are also replaced with new ones. After this repair the unit powers on and passes all self-tests. The unit can successfully measure signal frequencies and power.

Tutorial, Experiments & Teardown of a 77GHz Automotive FMCW Radar Module

In this episode Shahriar explores the principle operation of automotive FMCW radars. Thanks to a donated automotive radar module, various components of the system can be examined and explored. The PCB reveals three die-on-PCB ASICs responsible for generating and receiving 77GHz FMCW signals coupled to a 2D array of antennas. Several microwave components such as rat-race couplers and branchline couplers can also be observed. PCB rulers from SV1AFN Design Lab also show these microwave components at much lower frequencies. Two other ICs are used for ramp generation and PLL as well as a multi-input LNA/PGA/AAF with 12-bit ADC for IF processing. All components are examined under the microscope and the frequency of operation is calculated by measuring the branchline coupler’s dimensions.

Finally a simple Doppler effect radar is constructed by using a doubler, power divider, mixer and a pair of Vivaldi horn antennas. The Doppler effect can be observed by moving an object in front of the antenna pair.

Tektronix RSA607A Real-Time Spectrum Analyzer Review, Teardown & Experiments

In this episode Shahriar reviews the Tektronix RSA607A real-time spectrum analyzer which operates from 9kHz to 7.5GHz. The instrument has a 40MHz wide analysis window with a DANL of -160dBm. The built-in tracking generator is capable of measuring return loss, cable loss and DTF measurements without a need for an external coupler. This review is organized as follows:

01:03 – Model comparison and overview.
03:25 – Front & rear panel overview.
05:31 – Complete unit teardown & examination.
16:33 – Reverse engineering and experiments with a drone remote control transmitter.
39:27 – Characterizing and experimenting with an ISM band diplexer.
47:29 – Return loss measurements of a tunable band-pass filter.
53:23 – Concluding remarks.

Deepace KC901V 6.8GHz Handheld Network Analyzer Review, Teardown & Experiments

In this episode Shahriar reviews the Deepace KC901V 6.8GHz handheld network analyzer. This battery-powered instrument is an RF multi-instrument integrating VNA, spectrum analyzer, field strength meter, and a low-frequency signal generator. It can also perform signal port vector measurement and 2-ports simple vector network analyzing (S11, S21). The review is organized as follows:

01:24 – Instrument overview & block diagram.
05:36 – Full teardown along with RF and digital board analysis.
14:30 – Power on, calibration and S11 measurement of an antenna.
23:46 – Calibration for S21 and measurement of a tunable filter plus phase shifter.
32:23 – Distance to fault measurement of an SMA cable chain.
36:24 – Spectrum analyzer measurements and limitations.
43:16 – Signal generator measurements and issues.
48:20 – Other features and concluding remarks.
50:07 – Giveaway!

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