Keysight N9938B – FieldFox Handheld Microwave Signal Analyzer (26.5 GHz)

• Frequency range: 9 kHz – 26.5 GHz (useable to 5 kHz)
• Type-N (f) ports are standard – order option 100 for 3.5mm ports (required if ordering option 320 / reflection measurements)
• Make accurate spectrum analyzer measurements (± 0.3 dB) without warmup
• Expand functionality with optional pre-amplifier, tracking generator, power sensor support, built-in power meter, and more
• Carry one lightweight unit at 7.4 lb

The Keysight N9938B is a FieldFox handheld signal analyzer. The standard model has a frequency range of 9 kHz – 26.5 GHz (useable to 5 kHz) and the following functionalities:

• Basic spectrum analysis, four traces, different detector types, radio standard selection, limit lines
• Channel power, occupied bandwidth, adjacent channel power, spectrum emission mask
• AM/FM tune and listen, field strength measurements, antenna factors, frequency counter marker

On the N9938B, Type-N (f) ports are standard – order option 100 for 3.5mm ports (required if ordering option 320 / reflection measurements).

In microwave, radar, satellite communications, and commercial microwave backhaul, you may be responsible for hardware installation and maintenance as well as over-the-air signal quality. This could require regular monitoring for unexpected signals and performing signal surveillance.

FieldFox’s spectrum analyzer will excel in a dynamic spectral environment. You may face measurement challenges such as the need to detect a low-level signal under strong signal conditions (requiring high dynamic range), or close-in small interference signals (requiring excellent phase noise).

FieldFox’s superior dynamic range (TOI +15 dBm), close-in phase noise (-117 dBc/Hz at 10 kHz offset), and fast sweep time make these challenging tasks easier. FieldFox’s spectrum analyzer also provides a full power measurement suite and complete trace and state control.

For information on the other analyzer models in the Field Fox series, please see the selection information further below on this page.

Information on options

Field Fox “B” series signal analyzers are easily customized to your specific application with over twenty software options. For detailed information regarding options, please view this document beginning on page 11.

Further information on software features can also be viewed in the FieldFox software guide.

Options can be added to your order from the accessories section on the left side of this page.

Available options include:

• Pre-amplifier and tracking generator
• Over-the-Air (OTA) LTE FDD, LTD TDD, 5G TF, 5G NR
• Extended range transmission analysis (ERTA)
• Interference analysis and spectrogram
• Power sensor support
• I/Q analysis and streaming

Many models to choose from

The Keysight FieldFox series contains a large number of models, separated into two groups, the A series, and the B series.

Between the two series, there are over 40 FieldFox models to choose from. The documents below provide detailed information on both product capabilities, as well as available options for each. Each bullet in the list below will open a document in a new window. The FieldFox offers a variety of bandwidth ranges and is easily customizable to your specific application via software options.

Please note, that option part numbers are specific to each analyzer and can be viewed in the accessories section on the left side of their respective pages. For example, option 010 for an N9913B and N9915B would be N9913B-010 and N9915B-010.

• FieldFox A and B series comparison
• FieldFox A series data sheet
• FieldFox B series data sheet
• FieldFox A series technical overview
• FieldFox B series technical overview
• FieldFox A series configuration guide
• FieldFox B series configuration guide