Your browser limits use of the Used Keysight Equipment website.
Please consider switching to a current version of Chrome, Firefox, Edge or IE11 to use this site.

Do you need help?

Contact us with any question regarding your used Keysight equipment purchase!


Product selection and configuration assistance

General technical question

Availabilty, warranty extensions, calibration plans, additional software options, education discounts etc.

Question about this offer

Please call an expert at:

1 800 829-4444
Press #, then 2

7am – 5pm MT, Mon– Fri

or find your Local Keysight Contacts

Check Shipping

Find out if this unit can be shipped to your country

ID: P08-100247

Keysight N5511A-540

Phase Noise Test System / 50 kHz to 40 GHz

ID: P08-100247
Keysight N5511A-540 50 kHz to 40 GHz
Keysight N5511A-540 50 kHz to 40 GHz
Keysight N5511A-540 50 kHz to 40 GHz
Keysight N5511A-540 50 kHz to 40 GHz
Keysight N5511A-540 50 kHz to 40 GHz
Keysight N5511A-540 50 kHz to 40 GHz

Keysight N5511A-540

Phase Noise Test System / 50 kHz to 40 GHz

Refurbished, like New
Like New Warranty
Accessories Included
KeysightCare available

List Price USD 170,404.00 Save 50%
USD 85,202.00 Excl. taxes.
Not combinable with other discounts.

$20,142 value now $6,848
For professional and industrial use only.
Ships from Malaysia.
Ships to United States within 8 weeks.
Request Quote

Keysight N5511A-540 50 kHz to 40 GHz
Keysight Premium Used
Keysight N5511A-540
Phase Noise Test System / 50 kHz to 40 GHz
Configuration: 601, CH2, W10
Customization available
Shipping: Limited countries only
Warranty: Like New Warranty
Accessories Standard accessories included

Cannot ship to:

European Union

Unit only ships within China.

Unit ships worldwide.

Special Deal
Keysight N5511A-540 50 kHz to 40 GHz

Keysight Premium Used

Keysight  N5511A-540


USD 85,202.00 Save 50%

Installed Options

54040 GHz max carrier frequency
CH22-Channel with cross-correlation

Addable Options

Request a customized version of this model by requesting a Custom Quote

Product Specifications

Designed for Phase Noise Test System Power Users

The Keysight N5511A phase noise test system (PNTS) lets you measure at the limits of physics with readings down to kT (-177 dBm/Hz). The N5511A PNTS is a replacement for the gold-standard Keysight E5500 phase noise measurement system and is designed to meet the needs of phase noise power users.

Phase noise is unwanted phase modulation noise that emerges from nearly all radio frequency (RF) and microwave devices including oscillators, mixers, frequency dividers, frequency multipliers and amplifiers. PNTS is designed for phase noise “power users” whose needs are consistently unmet by existing commercial phase noise test instrumentation such as “one-box” integrated test solutions. These individuals are typically phase noise experts that would like to fully characterize the phase noise (as well as AM noise and baseband noise) emerging from their radio frequency and microwave devices. Power users, including professionals responsible for developing high-performance aerospace and defense applications as well as characterizing cutting-edge devices for 5G and other wireless communication systems, need to perpetually validate and improve the phase noise performance of their design

Frequency range

  • Use of external phase detectors allows measurements of millimeter-wave singals to beyond 100 GHz
  • Wide carrier offset range capability, from 0.01 Hz to 160 MHz internally (more than ten decades)

Noise measurement functions

  • Absolute and residual phase noise using the phase detector (quadrature) method in both single-channel and two-channel configurations. Two-channels enables use of cross-spectral averaging (cross-correlation) for improving sensitivity down to “kT,” the thermal phase noise floor (-177 dBm/Hz)
  • Measurement of one-port devices (VCO’s, DRO’s, crystal oscillators, synthesizers, etc.) and two–port devices (amplifiers, frequency converters, frequency dividers, etc.), plus CW, pulsed and spurious signals
  • Noise floor (sensitivity) better than -200 dBc/Hz (with +23 dBm and higher input RF signal, using cross-correlation)
  • AM noise on RF carriers from 50 kHz to 40 GHz
  • Baseband noise measurement from 0.01 Hz to 160 MHz
  • Pulsed RF measurements using built-in internal or customer-supplied external PRF filters

Additional capabilities and benefits

  • Designed for phase noise “Power Users” whose needs are consistently unmet by existing commercial phase noise test instrumentation
  • Multi-segment, fast real-time hardware cross-correlation using a Field Programmable Gate Array (FPGA)
  • Replacement for Keysight E5505A with a familiar user interface that is fully SCPI backwards compatible
  • Use of any frequency-tunable source as an external reference which can enable improved sensitivity for single-channel measurements and dramatically reduced cross-correlation time for dual-channel measurements
  • Flexible configurations are possible for a variety of phase noise measurement techniques, including PLL/reference source, residual and FM discriminator methods
  • “Future Proof” with PXIe: add additional pre-qualified modules to complete your test system (e.g. network analyzers, etc.)
  • Open architecture combines standard instruments, phase noise components, and PC software in a flexible manner, allowing reuse of instrumentation assets (proprietary closed architectures are less flexible because the embedded reference sources and analyzers can limit phase noise measurement performance)
  • N5510A software enables many standalone instruments to work together within a system
  • Access to external power splitter gives user ability to add external attenuators, amplifiers, and other test setup accessories independently to each channel and suppress any additive noise from these devices via the cross-correlation process


Standard accessories included.

For additional accessories, please search Keysight Accessories

Ready To Get Started?

What You Get

  • Keysight N5511A-540 Other
  • Fresh Calibration
  • Like-New standard accessories
  • Like-New Warranty
  • Agreed-On configuration

What You Can Add

  • Extended Warranty
  • KeysightCare Assured / Extended
  • Calibration Plan
  • Software (depending on model)

Still not sure about your purchase?

Feel free to ask any additional questions you may have. We're here to help!

Contact Us


What are the main differences between Keysight New, Keysight Premium Used & Keysight Used equipment?

  Keysight New Keysight Premium Used Keysight Used
Savings None Up to 70% Up to 90%
Condition New Like New Working Condition ¹
Firmware Latest Updated As is
Calibration Full Full As listed
Accessories New New As listed
Warranty 1 to 5 Years ² Like New 90 Days Warranty
Customization Possible Possible Limited

Learn more about Keysight Premium Used Here

Can I configure a unit to meet my personal needs?

Customization is generally possible with our Keysight Premium Used equipment. The majority of our Keysight Premium Used equipment can be configured just the way you need it. Options can be added at additional cost.
Customizing Keysight Premium Used equipment might change the delivery and lead time of the item.

Some Keysight Used products cannot be customized. Use the contact option on the product page to check with the our eStore team.

What accessories are included?

Keysight Premium Used equipment typically comes with the same accessories and warranty as new products.

Can you include other accessories?

We currently only offer those accessories which are part of the listing. Other accessories can be purchased separately at extra cost with your purchase of a Keysight Used or Keysight Premium Used unit.

Please mention in the comment field which additional accessories or support you are interested in.

For seperate or post-purchase ordering, please contact your local Keysight office or Keysight Partner here. Or check our online store if available for your region here.

Get an Account and Keep Track of Models, Prices, and Availability

Sign up now

and Non-profit Customers Can Save Extra

Learn more