Archive for September 20, 2017

Teardown & Repair of a SRS DS345 30MHz Synthesized Function Generator

In this episode Shahriar investigates a peculiar problem with a SRS DS345 function generator. The instrument does not appear to produce the correct output signal frequency. After some investigation it becomes clear that a few of the display digits are not active which hide the actual frequency settings. The problem is traced to a broken resistor on the display driver. The schematic of the instrument shows that the resistor is responsible for strobing the affected seven-segment digit. After the repair, the instrument’s performance is verified including the OCXO accuracy.

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.

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