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Agilent

11848 A Phase Noise Interface

Agilent 11848 A Phase Noise Interface family
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The Agilent 11848 A Phase Noise Interface is a phase-noise interface for the 3048A system. The Agilent 11848 A Phase Noise Interface supports measurements of carriers from 5 MHz to 1.6 GHz. The Agilent 11848 A Phase Noise Interface with Option 201 extends the input to 18 GHz without the use of a downconverter.[1][2]

Agilent11848 A Phase Noise Interface
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What it is

The Agilent 11848A Phase Noise Interface is an interface component for the 3048A system used in phase-noise measurements of carrier signals.[1][2]

How it works

The 11848A includes an optional high-frequency phase detector that extends the interface input range to eighteen gigahertz without external down conversion by the system.[2]

Where it fits in the process flow

The interface works with the 3048A system for carrier measurements from five megahertz to one point six gigahertz, and the optional phase detector extends that coverage to eighteen gigahertz.[1][2]

Applications

The 11848A is used for phase-noise measurement of carrier signals in an instrumentation system.[1][2]

The optional phase detector supports higher-frequency carrier measurements when direct system demodulation is not sufficient.[2]

Why won't it start?

Documented failure modes, common issues, and field considerations.

  • Agilent no longer sells or supports this product.

What do the numbers mean?

Power & electrical2

Carrier frequency range
5 MHz to 1.6 GHz[1]
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Frequency range
5 MHz to 18 GHz[2]
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Wafer handling1

Option 201 input range
1.6 to 18 GHz carrier frequency specifications are valid with this option[2]
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Optics & imaging1

External phase detector option
Option 201 adds a 1.2 to 18 GHz phase detector[2]
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Control & software3

Equipment type
Phase Noise Interface[4]
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Model
11848 A Phase Noise Interface[4]
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Product type
Phase Noise Interface[4]
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Configuration & options9

Model
11848 A[4]
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System association
3048A system[1]
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Option 201
Extends the input to 18 GHz without the use of a downconverter[1]
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Option 301
Included in the service manual title block[3]
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OEM
Agilent[4]
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System association
HP 3048A phase noise measurement system[2]
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Measurement capability
Phase noise and AM noise measurements[2]
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Built-in sources
Built-in sources for functional checks of signal handling circuits[2]
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Support status
Agilent no longer sells or supports this product[3]
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Vintage & configurations

  1. 1990-06OEM support ended[3]

    The service manual states that Agilent no longer sells or supports this product.

Documented models & variants

DesignationGenerationVintageChangesSource
11848A with Option 201——Adds a 1.2 to 18 GHz phase detector and extends the carrier-frequency range from 1.6 to 18 GHz.hparchive.com[2]
11848A Option 201——Adds a 1.2 to 18 GHz phase detector and extends the input to the interface to 18 GHz without the use of a downconverter.hparchive.com[2]
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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.

  • Carrier frequency range5 MHz to 1.6 GHz[1]
  • Frequency range5 MHz to 18 GHz[2]

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

What system is the 11848A part of?

The 11848A is part of the 3048A system.[2][1]

What does option 201 add?

Option 201 adds a high-frequency phase detector.[2]

What carrier-frequency range does option 201 support?

Option 201 extends the input to 18 GHz without external downconversion.[2][1]

What measurement role does the 11848A serve?

The 11848A is a phase noise interface for carrier measurements in the 3048A system.[2][1]

Not publicly documented

The following facts about the 11848 A Phase Noise Interface are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.

  • The control-system platform and OS era of the 11848 A Phase Noise Interface are not on record.

    Answerable by: an engineer who operated it or OEM installation records

  • The process node or technology generation of the 11848 A Phase Noise Interface is not on record.

    Answerable by: an OEM datasheet or a fab qualification report

  • No publicly documented compatible parts, consumables, or accessories for the 11848 A Phase Noise Interface are on record.

    Answerable by: an OEM parts catalog or a service engineer

  • No publicly hosted manuals, SOPs, or datasheets for the 11848 A Phase Noise Interface are on record.

    Answerable by: university cleanroom staff or an OEM application specialist

Sources & citations

Sources (4)Every fact above is drawn from these public sources
  1. [1]4gte.com — 4gte.com4gte.com
  2. [2]hparchive.com — hparchive.comhparchive.com
  3. [3]hparchive.com — hparchive.comhparchive.com
  4. [4]Equipment inventory listing
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Last updated Oct 4, 2026.

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