Agilent
53131 A Universal Controller
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
What it is
The Agilent 53131A is a universal counter, also referred to as a frequency counter. The instrument is designed to measure frequency, period, time interval, pulse width, duty cycle, and other signal parameters. The 53131A is rated for a maximum frequency of 225 MHz on its direct input channels.[1][2]
What do the numbers mean?
Power & electrical1
- Frequency range
- 225 MHz (standard); up to 3.0, 5.0, or 12.4 GHz with optional Channel 3 (Option 030, 050, or 124)[1]
Optics & imaging2
Control & software1
Vintage & configurations
Documented models & variants
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| 53131A with Option 030 | — | — | Extends frequency capability to 3.0 GHz via Channel 3 | manualslib.com[1] |
| 53131A with Option 050 | — | — | Extends frequency capability to 5.0 GHz via Channel 3 | manualslib.com[1] |
| 53131A with Option 124 | — | — | Extends frequency capability to 12.4 GHz via Channel 3 | manualslib.com[1] |
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
- Frequency range225 MHz (standard); up to 3.0, 5.0, or 12.4 GHz with optional Channel 3 (Option 030, 050, or 124)[1]
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
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Frequently asked questions
Does the 53131A have a prescaler option to measure higher frequencies?
The 53131A can be equipped with an optional prescaler to extend its frequency measurement range beyond 225 MHz. One common aftermarket prescaler option covers up to 3 GHz.[3]
Not publicly documented
The following facts about the 53131 A Universal Controller 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 53131 A Universal Controller are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the 53131 A Universal Controller 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 53131 A Universal Controller are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 53131 A Universal Controller is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the 53131 A Universal Controller are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (4)Every fact above is drawn from these public sources
- [1]manualslib.com — manualslib.commanualslib.com
- [2]HP 53131A/132A 225 MHZ PROGRAMMING MANUAL Pdf Download | ManualsLib — manualslib.commanualslib.com
- [3]Restoration of an Agilent 53131A Frequency Counter - Nashua Area Radio Society — n1fd.orgn1fd.org
- [4]Equipment inventory listing
Last updated Aug 20, 2026.
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