TSP #226 - Saker 50kV Common-Mode Fiber Isolated Active Probe (XFVP) Review, Teardown & Experiments
17.4K views
May 26, 2023 9:03 PM
In this episode Shahriar reviews the Saker fiber-optically isolated active voltage probe XFVP. The fully galvanically isolated probe can reject common-mode signals in the tens of thousands of volts range. Signals with fast rising common-mode can also be rejected thanks to its high bandwidth of beyond 250MHz. Information about the Saker probe can be found here:
https://saker-mv.com/fiber-isolated-voltage-probe/
This review is organized as follows:
00:00 – Introduction & optical probe overview, principle of operation, dividers and accessories
05:07 – Full teardown of the probe head, probe body and 500x attenuator box
09:28 – Differential probe versus an optically isolated probe architecture
11:22 – Excess noise, SNR, dynamic range, THD and auto-calibration experiments
18:13 – Measured bandwidth of probe, S-parameters, gain ripple, phase response and group delay
19:47 – Measuring a GaN switching behavior with 400V of common-mode signal swing
27:03 – Concluding remarks
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TNP #36 - Tektronix TCP0030 120MHz, 30A AC/DC Current Probe Teardown, & Failure Analysis
20.5K views
May 15, 2023 9:28 PM
In this episode Shahriar takes a look at a pair of Tektronix TCP0030 current probes which fail the degauss function. The principle theory of the probe is discussed as well as the teardown of the probe head.
The failure is traced to a disconnected Hall effect sensor inside the transformer assembly. Unfortunately the assembly is fully potted and cannot be disassembled without destroying the part. A destructive disassembly shows the unique and intricate design of the transformer module and ultra thin embedded Hall effect sensor. Although neither of the probes could be repaired, the teardown and analysis provides insight in to the probe operation and typical failure point.
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TNP #35 - InPhi 43Gb/s 8Vpp Differential Mach-Zehnder Driver ASIC & Module Teardown & Analysis
15.3K views
May 7, 2023 8:22 PM
In this episode Shahriar takes a look at a high-speed driver module intended for coherent applications. The Mach-Zehnder driver circuit can reach speeds of 43Gb/s and provide up to 8Vpp into a differential modulator. The ASIC is realized in an InP HBT process and manufactured more than 21 years ago! The teardown shows the interface design as well as detailed circuit analysis & ASIC architecture.
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TNP #34 - Zeiss Microscope Motorized XYZ Axis Stage Focus Stacking & Image Stitching Tutorial
19K views
May 6, 2023 3:22 PM
In this episode Shahriar continues his journey with upgrading the Zeiss microscope. The microscope is now entirely motorized including the XYZ axis. This, combined with a high-quality Nikon DLSR allows the creation of some extraordinary focus stacked imaged. The interface between the microscope & DSLR is handled through an LMScope adapter:
https://www.lmscope.com/en/produkte_en.html
The microscope is controlled via a custom GUI which manages all of the microscope functions as well as a fully automated focus stacking routine.
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TNP #33 - OmniChrome Helium-Cadmium (HeCd) 442nm Laser Teardown, Theory & Experiments
24.7K views
April 30, 2023 3:48 PM
In this episode Shahriar dives into the detailed operation of a HeCd laser system. The laser head sub-components and principle operation is discussed as well as the teardown of the power supply and its primary sections. Various spectral measurements are performed on the laser output as well as the non-coherent emissions from the main laser cavity.
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