TSP #212 – Siglent SNA5000A 8.5GHz 4-Port Vector Network Analyzer Review, Teardown & Experiments (I)

In this episode (Part 1) Shahriar presents a detailed review of the Siglent SNA5000A series vector network analyzer. The Siglent SNA VNA has a frequency range of 9 kHz to 8.5 GHz, with 2- and 4-port models available. Designed to give you instant insight into scattering, differential, and time-domain measurements. Siglent VNAs enables measurements of the Q-factor, bandwidth, and insertion loss filters and feature impedance conversion, movement of measurement plane, limit testing, ripple test, fixture simulation, and adapter removal/insertion adjustments. There are five sweep types: Linear-Frequency, Log-Frequency, Power-Sweep, CW-Time, and Segment-Sweep mode. SNA5000A VNAs also support scattering-parameter correction of SOLT, SOLR, TRL, Response, and Enhanced Response for increased flexibility in R&D and manufacturing applications:


This (Part 1) of the review is organized as follows:

00:00 – Introductions.
01:02 – Instrument overview, design, user & RF interfaces.
04:27 – Detailed teardown, architecture, RF design & VNA board reverse engineering.
18-21 – Calibration, E-Cal compatibility, built-in procedures, initial GUI overview.
22:12 – High rejection filter characterization, pushing the dynamic range limit, port-to-port isolation, IF BW, filtering & averaging.
28:28 – Characterizing active devices, measurement topology, differential & common-mode responses, power control, waveform comparison, phase & magnitude response.
39:07 – Sweep types, power sweep, compression measurements, non-linear DUT characteristics, impedance & Smith charts.
44:12 – VNA as RF synthesizer, CW generation, tone purity & power accuracy.
45:26 – Concluding remarks.


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