https://xgytek.com/blog Technical articles and application notes on RF, power, semiconductor and automated test from XGY Tek. en Mon, 02 Nov 2026 00:00:00 GMT https://xgytek.com/blog/lvrt-hvrt-zvrt-explained https://xgytek.com/blog/lvrt-hvrt-zvrt-explained LVRT means staying online through voltage dips; HVRT and ZVRT extend it to swells and zero-voltage faults. Learn how grid codes define the curves and how testing works. Electrical Concepts and Key Parameters Fri, 07 Aug 2026 00:00:00 GMT https://xgytek.com/blog/why-medium-voltage-sst-is-difficult-to-test https://xgytek.com/blog/why-medium-voltage-sst-is-difficult-to-test An SST combines medium-voltage apparatus, high-power conversion, high-frequency isolation, grid interaction and multiple ports. See what a credible validation plan must cover. Application Test Guides Fri, 07 Aug 2026 00:00:00 GMT https://xgytek.com/blog/front-end-vs-back-end-isolation https://xgytek.com/blog/front-end-vs-back-end-isolation Transformer placement changes the source-to-DUT transfer path, grounding options, fault response, and evidence required for medium-voltage testing. Isolation, Grounding and Safety Wed, 05 Aug 2026 00:00:00 GMT https://xgytek.com/blog/how-to-write-an-rfq-medium-voltage-grid-simulator https://xgytek.com/blog/how-to-write-an-rfq-medium-voltage-grid-simulator The RFQ's quality determines the quote's quality. A seven-section skeleton — DUT, electrical envelope, events, interfaces, safety, evidence, commercial — plus the vendor questions to require answered and the classic mistakes. Selection and Planning Wed, 05 Aug 2026 00:00:00 GMT https://xgytek.com/blog/five-ways-to-test-mw-scale-power-electronics https://xgytek.com/blog/five-ways-to-test-mw-scale-power-electronics Compare megawatt power electronics test methods (utility connection, back-to-back, LV source plus transformer, PHIL and a full-power grid simulator) by voltage, power, event edge, RoCoF, harmonics and energy path. Application Test Guides Mon, 03 Aug 2026 00:00:00 GMT https://xgytek.com/blog/grid-code-compliance-testing-guide https://xgytek.com/blog/grid-code-compliance-testing-guide The standards landscape for grid-connected equipment — IEEE 1547/1547.1, UL 1741, IEC 62116, AS/NZS 4777.2 and AEMO requirements — what a campaign contains, and why capability is never certification. Application Test Guides Mon, 03 Aug 2026 00:00:00 GMT https://xgytek.com/blog/energy-storage-pcs-testing-checklist https://xgytek.com/blog/energy-storage-pcs-testing-checklist A BESS PCS test checklist for grid code compliance, charge and discharge performance, battery-side interface, protection and endurance, with the medium-voltage grid simulator envelope each test needs. Application Test Guides Wed, 29 Jul 2026 00:00:00 GMT https://xgytek.com/blog/how-to-choose-a-grid-simulator https://xgytek.com/blog/how-to-choose-a-grid-simulator Voltage class, real vs apparent power, quadrants, edge speed, per-phase independence, harmonics, frequency range, grounding, protection, automation — the ten specifications that decide fitness, and the questions that expose them. Selection and Planning Wed, 29 Jul 2026 00:00:00 GMT https://xgytek.com/blog/how-to-test-a-medium-voltage-sst-at-full-power https://xgytek.com/blog/how-to-test-a-medium-voltage-sst-at-full-power The complete SST test bench, block by block: programmable MV grid interface, regenerative DC load or battery emulator, measurement and safety layer — plus the test matrix and an RFQ checklist. Application Test Guides Mon, 27 Jul 2026 00:00:00 GMT https://xgytek.com/blog/what-is-a-grid-simulator https://xgytek.com/blog/what-is-a-grid-simulator A grid simulator is a programmable AC source that reproduces grid behaviour — sags, swells, harmonics, ride-through events — for lab testing. What it does, who needs one, and how to spec it. Grid Simulator Fundamentals Mon, 27 Jul 2026 00:00:00 GMT https://xgytek.com/blog/what-is-a-solid-state-transformer https://xgytek.com/blog/what-is-a-solid-state-transformer An engineering guide to solid-state transformer architecture, limits, and the role of a medium-voltage grid simulator in full-power SST validation. Technical Article Wed, 22 Jul 2026 00:00:00 GMT https://xgytek.com/blog/rf-test-equipment-rfq-checklist-global-buyers https://xgytek.com/blog/rf-test-equipment-rfq-checklist-global-buyers An RFQ template for RF test equipment with filled examples for a spectrum analyzer, signal generator, and vector network analyzer, written against published YSA-P400, YSG-400B, and YNA-720 limits. Procurement Checklist Sat, 11 Jul 2026 00:00:00 GMT https://xgytek.com/blog/semiconductor-test-fixture-validation-checklist https://xgytek.com/blog/semiconductor-test-fixture-validation-checklist How to validate a probe card or wafer-level test fixture: chuck flatness, probing resolution, RF probe pitch and insertion loss, calibration plane, temperature, and touchdown repeatability, with XMPS-208 and GPR figures. Procurement Checklist Thu, 09 Jul 2026 00:00:00 GMT https://xgytek.com/blog/source-measure-unit-selection-for-semiconductor-test https://xgytek.com/blog/source-measure-unit-selection-for-semiconductor-test How to choose a PXIe source measure unit for semiconductor test: voltage and current ranges, resolution, accuracy at the lowest range, channel count, and sampling for XMU-5421, XMU-5422, and XMU-5921, with a leakage example. Technical Article Tue, 07 Jul 2026 00:00:00 GMT https://xgytek.com/blog/manual-probe-station-wafer-level-test-checklist https://xgytek.com/blog/manual-probe-station-wafer-level-test-checklist What to check before buying a manual probe station for semiconductor wafer, RF probe, and device characterization workflows. Technical Article Tue, 30 Jun 2026 00:00:00 GMT https://xgytek.com/blog/regenerative-ac-dc-source-ev-power-test-planning https://xgytek.com/blog/regenerative-ac-dc-source-ev-power-test-planning A planning guide for regenerative AC/DC sources used in EV chargers, inverters, grid simulation, and power electronics validation. Technical Article Mon, 29 Jun 2026 00:00:00 GMT https://xgytek.com/blog/battery-test-system-quote-requirements https://xgytek.com/blog/battery-test-system-quote-requirements How to size battery cycler equipment from real operating points, with N351, N355 and N692 ratings, a worked energy and heat calculation, safety states and RFQ acceptance evidence. Procurement Checklist Sat, 27 Jun 2026 00:00:00 GMT https://xgytek.com/blog/phase-stable-rf-test-cable-buying-guide https://xgytek.com/blog/phase-stable-rf-test-cable-buying-guide How to compare phase-stable RF test cable specifications: phase stability, amplitude stability, loss, VSWR, and bend radius, with GL, PT, and VT series figures side by side. Technical Article Thu, 25 Jun 2026 00:00:00 GMT https://xgytek.com/blog/automated-test-rack-acceptance-plan https://xgytek.com/blog/automated-test-rack-acceptance-plan How to define acceptance criteria for Australian-made automated test racks, including measurements, safety, reports, FAT/SAT evidence, and export review. Technical Article Tue, 23 Jun 2026 00:00:00 GMT https://xgytek.com/blog/handheld-spectrum-analyzer-field-rf-troubleshooting-checklist https://xgytek.com/blog/handheld-spectrum-analyzer-field-rf-troubleshooting-checklist How to hunt RF interference with a handheld spectrum analyzer: field-kit figures for the YSA-P400 and XDA directional antennas, a YSA-P045 to P400 range comparison, and a staged localisation method. Technical Article Mon, 22 Jun 2026 00:00:00 GMT https://xgytek.com/blog/bidirectional-dc-power-supply-battery-cycling-selection https://xgytek.com/blog/bidirectional-dc-power-supply-battery-cycling-selection How to evaluate bidirectional DC power supplies for battery cycling, inverter validation, regenerative load testing, and EV bench workflows. Technical Article Sat, 20 Jun 2026 00:00:00 GMT https://xgytek.com/blog/emc-pre-compliance-lisn-spectrum-analyzer-setup https://xgytek.com/blog/emc-pre-compliance-lisn-spectrum-analyzer-setup How to choose and set up a LISN for EMC pre-compliance testing: EM5040 E/A/B/C ratings compared, why the spectrum analyzer needs a limiter, corrections, settings and repeatable reporting. Technical Article Thu, 18 Jun 2026 00:00:00 GMT