Agilent
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The HP 346A is designed especially for accurate characterization of input-impedance-sensitive devices. The HP 346A has a very small change in reflection coefficient of less than 0.01 from ON to OFF. The HP 346A has individually calibrated ENR values at specific frequencies. The HP 346A has low SWR to reduce a source of measurement uncertainty caused by reflections of test signals.[4][5]
Noise sources belong to the electrical and RF characterization layer of semiconductor and electronics work rather than to wafer fabrication process equipment. Noise sources are used after fabrication, during device evaluation, engineering characterization, bench measurement, and related laboratory or production test activity. Noise sources commonly interface with measurement instruments and fixtures around the device under test rather than with deposition, lithography, etch, or cleaning steps.
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The following facts about the 346 A Noise Source are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the 346 A Noise Source are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 346 A Noise Source are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the 346 A Noise Source are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the 346 A Noise Source are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 346 A Noise Source is not on record.
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Last updated Oct 19, 2026.
The Tenney TPS JR-A-F4T is a junior compact temperature test chamber with a 1.2 cubic foot chamber size and a temperature range of -68°C to +180°C.
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