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Keysight

N 8975 A

Keysight N 8975 A family
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The Keysight N 8975 A is a noise figure analyzer. The Keysight N 8975 A has a frequency range of 10 MHz to 26.5 GHz. The Keysight N 8975 A supports simultaneous noise figure and gain measurements.[1][2][3]

KeysightN 8975 A
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What it is

The Keysight N8975A is a noise figure analyzer for RF and microwave measurements. The N8975A measures noise figure and gain, and it supports analysis of amplifiers and frequency-translating devices.[2][5][6]

The N8975A has a specified frequency range from 10 MHz to 26.5 GHz. The N8975A uses an APC 3.5 male RF input connector as standard.[1][2][3]

How it works

The N8975A supports simultaneous noise figure and gain measurements. The N8975A also supports external local-oscillator control through a dedicated second GPIB connection for frequency-translating devices.[2][5][1]

The N8975A provides selectable measurement bandwidths and graphical display formats for measured data. The N8975A also supports display and output of results in multiple formats, including graphical, tabular, and meter views.[1][2]

Where it fits in the process flow

The N8975A fits in RF receiver, amplifier, and converter characterization after device assembly and before final performance verification. The instrument supports measurement of devices that require noise figure and gain evaluation as part of development or production test.[2][5]

The N8975A is used with noise sources and can accept SNS series noise sources. The N8975A also supports amplifier and frequency-converting-device measurements that involve an external local oscillator.[2][3]

Applications

The N8975A is used for noise figure and gain characterization of amplifiers. The N8975A is also used for frequency-translating devices, including converters that require local-oscillator control.[2][5]

The N8975A is specified for RF and microwave work through 26.5 GHz. The N8975A supports measurements with compatible noise sources and supports output, printing, and saving of measurement results.[1][2]

What do the numbers mean?

Power & electrical3

Frequency range
10 MHz to 26.5 GHz[1]
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Measurement bandwidths (nominal)
4 MHz, 2 MHz, 1 MHz, 400 kHz, 200 kHz, 100 kHz[1]
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RF input connector
APC 3.5 (m), 50 Ω nominal[1]
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Dimensions & facilities2

Weight (typical, without options)
17.5 kg (38.61 lbs.)[1]
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Dimensions without handle
222 mm (H) x 410 mm (D) x 375 mm (W)[1]
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Configuration & options5

Manufacturer
Keysight[4]
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Model
N 8975 A[4]
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Instrument type
Noise figure analyzer[1]
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Display type
17 cm color LCD panel[1]
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Connectivity
GPIB IEEE-488, LO GPIB IEEE-488, RS-232, printer port, VGA output[1]
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What does it need to run?

Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.

  • Frequency range10 MHz to 26.5 GHz[1]
  • Measurement bandwidths (nominal)4 MHz, 2 MHz, 1 MHz, 400 kHz, 200 kHz, 100 kHz[1]
  • RF input connectorAPC 3.5 (m), 50 Ω nominal[1]

Where are the manuals?

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Not publicly documented

Field notes

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Frequently asked questions

What is the frequency range of the N8975A?

The N8975A has a specified frequency range from 10 MHz to 26.5 GHz.[1][2][3]

Can the N8975A measure noise figure and gain at the same time?

The N8975A supports simultaneous noise figure and gain measurements.[2][5]

What connector is standard on the RF input?

The N8975A uses an APC 3.5 male RF input connector as standard.[1][2]

Not publicly documented

The following facts about the N 8975 A 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 N 8975 A are on record.

    Answerable by: OEM historical records or a trade-press announcement

  • No publicly documented variants, configuration options, or revision breakpoints of the N 8975 A 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 N 8975 A 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 N 8975 A are on record.

    Answerable by: a field service engineer, process engineer, or maintenance technician

  • The process node or technology generation of the N 8975 A is not on record.

    Answerable by: an OEM datasheet or a fab qualification report

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Sources & citations

Sources (6)Every fact above is drawn from these public sources
  1. [1]testequipmenthq.com — testequipmenthq.comtestequipmenthq.com
  2. [2]Keysight Technologies N8975A | 10MHz-26.5GHz Noise Figure Analyzer — electrorent.comelectrorent.com
  3. [3]Keysight (Agilent) N8975A Noise [Source/Figure Meter] | Sale | Purchase | Buy | Rent | Lease — ntecusa.comntecusa.com
  4. [4]Equipment inventory listing
  5. [5]On Sale! Agilent N8975A Noise Figure Analyzer Model N-8975A Agilent — aaatesters.comaaatesters.com
  6. [6]Keysight N8975A Noise Figure Analyzer | Liberty Test Equipment — libertytest.comlibertytest.com
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Last updated Oct 6, 2026.

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