FieldFox Handheld Analyzers
4/6.5/9/14/18/26.5/32/44/50 GHz
This configuration guide describes configurations, options and accessories
for the FieldFox A-Series family of portable analyzers. This guide should be
used in conjunction with the technical overview and data sheet for a
complete description of the analyzers. The table on Page 3 titled “FieldFox
A-Series Family and Options” shows a comparison of the functions available
in the FieldFox A-Series family of analyzers.
Included accessories
The following accessories
are included with every
FieldFox
Note: Combination analyzer (combo) = Cable and antenna tester (CAT) +
Vector network analyzer (VNA) + Spectrum analyzer (SA)
• AC/DC adapter
• Battery
• Soft carrying case
• LAN cable
• Quick Reference Guide
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Table of Contents
FieldFox A-Series Family and Options ......................................................................................................... 3
FieldFox RF and Microwave (Combination) Analyzers ................................................................................. 4
Analyzer models ........................................................................................................................................ 4
Analyzer options ........................................................................................................................................ 5
FieldFox RF and Microwave (Combination) Analyzer FAQs ........................................................................ 7
ERTA System Typical Configuration ........................................................................................................... 10
FAQs – Applicable to All FieldFox RF and Microwave Analyzers
FieldFox Microwave Vector Network Analyzers .......................................................................................... 13
Analyzer models ...................................................................................................................................... 13
Analyzer options ...................................................................................................................................... 13
FieldFox Microwave Vector Network Analyzer FAQs ................................................................................. 14
FieldFox Microwave Spectrum Analyzers ................................................................................................... 15
Analyzer models ...................................................................................................................................... 15
Analyzer options ...................................................................................................................................... 15
FieldFox Spectrum Analyzer FAQs ............................................................................................................. 16
Upgrades ..................................................................................................................................................... 17
FieldFox microwave (combination) analyzer upgrades N9913AU, N9914AU, N9915AU,
N9916AU, N9917AU, N9918AU, N9950AU, N9951AU, N9952AU ........................................................ 17
......................................................... 11
FieldFox signal analyzer upgrades N9935AU, N9936AU, N9937AU, N9938AU, N9960AU,
N9961AU, N9962AU ............................................................................................................................... 18
FieldFox VNA upgrades N9925AU, N9926AU, N9927AU, N9928AU .................................................... 19
FieldFox RF and microwave analyzers hardware upgrades ................................................................... 19
Documentation ............................................................................................................................................ 20
Calibration Kits ............................................................................................................................................ 20
Accessories ................................................................................................................................................. 22
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FieldFox A-Series Family and Options
CAT/vector network analysis
010
VNA time domain
√ √ —
√ on N991xA
(Not on N995xA)
210
VNA transmission/reflection
√
Base model 1
—
211
VNA full 2-port S-parameters
√ √ —
212
1-port mixed-mode S-parameters
√ √ —
215
TDR cable measurements
√ √ —
305
Cable and antenna analyzer
Base model 1
√
— 2
308
Vector voltmeter
√ √ —
320
Reflection meas. (RL, VSWR and scalar meas.)
— 3
— 3
√
√ on N991xA
N995xA)
209
Extended range transmission analysis (ERTA)
√ — √
220
Tracking generator
— 4 — √
233
Spectrum analyzer
√
—
Base model 1
235
Pre-amplifier √ —
√
236
Interference analyzer and spectrogram
√ — √
238
Spectrum analyzer time gating
√ — √
312
Channel scanner
√ — √
350
Real-time spectrum analyzer (RTSA)
√ (Not on N9912A)
—
√
351
I/Q Analyzer (IQA)
√ (Not on N9912A)
—
√
352
Indoor and outdoor mapping
√ (Not on N9912A)
—
√
353
IQ streaming
√ (Not on N9912A)
—
√
355
Analog demodulation
√ — √
356
Noise figure (NF)
√ (Not on N9912A)
—
√
358
EMF measurements
√ (Not on N9912A)
—
√
360
Phased array antenna support
√ (N995xA only)
—
√ (N996xA only)
370
Over-the-Air (OTA) LTE FDD
√ (Not on N9912A)
—
√
371
Over-the-Air (OTA) LTE TDD
√ (Not on N9912A)
—
√
377
Over-the-Air (OTA) 5GTF
√ (Not on N9912A)
—
√
Option Description
112 QuickCal
V5K VNA 5kHz start frequency
Spectrum analysis
Combination
Analyzers N991xA,
N995xA
(Not on N9912A nor
Vector Network
Analyzers N992xA
√ —
— —
Spectrum Analyzers
N993xA, N996xA
1. Base model means that the functionality listed is the primary function of that instrument. For example, on the N991xA or
N995xA combo analyzers, cable and antenna analysis is the standard function included with every N991xA or N995xA.
2. Option 305 is not available on the N993xA or N996xA. However, a subset of cable and antenna analyzer measurements, return
loss and VSWR, is available as Option 320.
3. Option 320 is not applicable to N991xA, N995xA, or N992xA. The reflection measurements of return loss and VSWR are
included with every N991xA, N995xA, and N992xA. So, there is no need for an Option 320 on these analyzers.
4. On the N991xA or N995xA analyzers, order Options 233 and 210 to obtain a tracking generator with the spectrum analyzer.
Option 220 is not available on the N991xA or N995xA analyzers. Option 233 provides the spectrum analyzer capability and
Option 210 the “tracking” capability.
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Combination
Power measurements
208
USB power sensor meas. versus frequency
√ √ √
302
USB power sensor support
√ √ √
310
Built-in power meter
√ √ √
330
Pulse meas. with USB peak power sensor
√ √ √
030
Remote control capability
√ √ √
307
GPS receiver √ √
√
309
DC bias variable-voltage source
√ (Not on N9912A)
√
√
—
Frequency extender support 1
√ (Not on N9912A)
—
√
89601B
PathWave VSA (89600 VSA) software
√ (Not on N9912A)
—
√
N6820ES
Surveyor 4D software
√ (Not on N9912A)
—
√
N9913A
4 GHz FieldFox RF analyzer
30 kHz to 4 GHz
100 kHz to 4 GHz
Type-N (f)
N9914A
6.5 GHz FieldFox RF analyzer
30 kHz to 6.5 GHz
100 kHz to 6.5 GHz
Type-N (f)
N9915A
9 GHz FieldFox microwave analyzer
30 kHz to 9 GHz
100 kHz to 9 GHz
Type-N (f)
N9916A
14 GHz FieldFox microwave analyzer
30 kHz to 14 GHz
100 kHz to 14 GHz
Type-N (f)
N9917A
18 GHz FieldFox microwave analyzer
30 kHz to 18 GHz
100 kHz to 18 GHz
Type-N (f)
N9918A
26.5 GHz FieldFox microwave analyzer
30 kHz to 26.5 GHz
100 kHz to 26.5 GHz
3.5 mm (m)
N9950A
32 GHz FieldFox microwave analyzer
300 kHz to 32 GHz
9 kHz to 32 GHz
NMD 2.4 mm (m)
N9951A
44 GHz FieldFox microwave analyzer
300 kHz to 44 GHz
9 kHz to 44 GHz
NMD 2.4 mm (m)
N9952A
50 GHz FieldFox microwave analyzer
300 kHz to 50 GHz
9 kHz to 50 GHz
NMD 2.4 mm (m)
Option Description
System features
Windows based software
1. Frequency extenders are not currently supported on models N9913A, N9914A and N9915/35A since the starting LO
frequency of these mixers is higher than 9 GHz and the LO is provided to the mixer from FieldFox Port 1. For a list
of supported OML frequency extenders, see Accessories page 23.
Analyzers
N995xA
N991xA,
Vector Network
Analyzers N992xA
Spectrum Analyzers
N993xA, N996xA
FieldFox RF and Microwave (Combination) Analyzers
Analyzer models
Step 1. Select the model that provides the desired frequency range.
Model Description
1. Useable to 5 kHz.
CAT and VNA
frequency
SA frequency 1 Test port connectors
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Analyzer options
010
VNA time domain
Requires 210, recommend 211. See page 7, FAQ #7
112
QuickCal
Not available for N995xA models. See page 7, FAQ #9
Recommend ordering a cal kit. See page 6, FAQ #4 and page 7,
FAQ #6
211
VNA full 2-port S-parameters
Requires 210, recommend ordering a cal kit. See page 6, FAQ #5
212
1-port mixed-mode S-parameters
Requires 210 and 211
215
TDR cable measurements
—
210 and 211 required to obtain full VVM functionality. See page 7,
FAQ #8
V5K
VNA 5kHz start frequency
Not available for N9912A nor N995xA
Requires 233 and 210. Recommend 307. Requires two FieldFox
units. See page 8, FAQ # 10. See page 10 for typical configuration.
233
Spectrum analyzer
—
235
Pre-amplifier
Requires 233
236
Interference analyzer and spectrogram
Requires 233
238
Spectrum analyzer time gating
Requires 233
312
Channel scanner
Requires 233
350
Real-time spectrum analyzer (RTSA) 1
Requires 233, Recommend 235. See page 8, FAQ #12
351
I/Q Analyzer (IQA) 1
Requires 233
Requires 233, 307, and at least one of 312, 360, 370, 371 or 377.
See page 9, FAQ #17
353
IQ streaming
1
Requires 233, 351
355
Analog demodulation
Requires 233
Requires 233, 235, 309 and accessory item N9910X-713 BNC to
noise source requirements.
358
EMF measurements
Requires 233. Also requires triaxial antenna. See page 9, FAQ #18
Requires 233. Also requires phased arrayed antenna. See page 9,
FAQ #16
370
Over-the-Air (OTA) LTE FDD 1
Requires 233, 307. Recommend 235.
371
Over-the-Air (OTA) LTE TDD 1
Requires 233, 307. Recommend 235.
377
Over-the-Air (OTA) 5GTF 1
Requires 233, 307. Recommend 235. See page 9, FAQ #19
Step 2. Select optional measurement capabilities.
Any of these options can easily be added as a software upgrade in the future. Exception: Option 112 is
only applicable to N991xA models. It is not applicable to N995xA models.
Option Description Prerequisite options/notes
CAT/vector network analysis
210 VNA transmission/reflection
308 Vector voltmeter
Spectrum analysis
209 Extended range transmission analysis (ERTA)
352 Indoor and outdoor mapping
356 Noise Figure (NF) 1
360 Phased array antenna support
1. Requires CPU2 fast processor. See page 9, FAQ #13.
SMB cable. See page 9, FAQ #15 for external preamplifier and
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Option Description Prerequisite options/notes
208
USB power sensor meas. versus frequency
Requires 302
302
USB power sensor support
Need to order USB power sensor 2
310
Built-in power meter
No power sensor required. See page 11, FAQ #1
Need to order USB peak power sensor. See page 12, FAQs #7 and
#8
030
Remote control capability
Requires an iOS device
307
GPS receiver
Need to order GPS antenna, N9910X-825. See page 12, FAQ #3
309
DC bias variable-voltage source
Recommend N9910X-713 cable, see page 12, FAQ #4
Requires 233. Optional 350, 351, 360, 370, 371, 377, PathWave
VSA software. See Accessories, page 23
89601B
PathWave VSA (89600 VSA) software
Requires 233 and CPU2 processor. See page 9, FAQ #13
N6820ES
Surveyor 4D software 1
Requires 233, 235 and 307, see page 10, FAQ #20
Power measurements
330 Pulse meas. with USB peak power sensor
System features
— Frequency extender support
Windows based software
1. Requires CPU2 fast processor. See page 9, FAQ #13.
2. List of compatible sensors available from www.keysight.com/find/fieldfoxsupport.
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FieldFox RF and Microwave (Combination) Analyzer FAQs
The base model includes the cable and antenna analyzer
Measurements: DTF (dB, linear, VSWR), return loss and DTF, return loss (dB), and 1-port cable loss
Calibrations: CalReady, OSL, and response cal
Note: 2-port insertion loss is NOT included with the base model, if 2-port insertion loss is needed, order
Option 210
Note: Base analyzer does not have phase information, for S11 or S21 phase, order Option 210
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
Tracking generator (TG)/Independent source:
• TG tracking mode (traditional TG operation, swept SA coupled to swept source) - (requires Option 210)
3. What is included with
236?
Interference analyzer and spectrogram
Option 210 adds a VNA with transmission/reflection (T/R) capability
Measurements: S21, S11, magnitude and phase
Additionally, in the CAT mode, you can measure 2-port insertion loss
Calibrations: CalReady, OSL, response, and enhanced response cal
If you need all four S-parameters, order Options 210 and 211
If you need 2-port cal, order Options 210 and 211
Adds tracking mode to the tracking generator/independent source included with Option 233, spectrum
analyzer
5. What is included with
Option 211 adds full 2-port S-parameter capability to the VNA mode
Measurements: All four S-parameters (S11, S21, S22, S12), magnitude and phase
Calibrations: CalReady, OSL, response, enhanced response, and full 2-port cal
6. Can I measure group delay
analyzers?
S11/S21 in time domain, if Option 210 is ordered. To get time domain data for all four S-parameters and
full 2-port cal, order Option 211.
View both time and frequency domain data at the same time
Low-pass, impulse, and band-pass modes
Minimum, medium, and maximum window
Gating
With Option 308: 1-port cable trimming
With Options 308 and 210: 1-port cable trimming, 2-port transmission
With Options 308, 210, and 211: 1-port cable trimming, 2-port transmission, A/B and B/A
Note: A/B and B/A measurements require an external source
Option 112 (QuickCal), is not available for N995xA analyzers. It is available for N991xA analyzers.
QuickCal is included with Option 112.
• 1-port, enhanced response, and 2-port QuickCal with a full 2-port analyzer (one that has Option 211)
Question Answer
1. What is included with a
base N991xA/N995xA
analyzer?
2. What is included with
N991xA/N995xA Option
233?
• TG CW mode (source CW frequency can be set independent of SA frequency) - included
• TG CW coupled mode (source CW frequency is auto coupled to SA’s center frequency) - included
N991xA/N995xA Option
4. What is included with
N991xA/N995xA Option
210?
N991xA/N995xA Option
211?
on N991xA/ N995xA
7. What is included with
N991xA/N995xA Option
010?
8. What is included with
N991xA/N995xA Option
308?
Trace playback and recording
If you have phase measurement capability, then you can measure group delay. Option 210 is required for
any phase measurement capability. So, if you do not have Option 210, you cannot measure group delay.
• 1-port QuickCal with a base analyzer
9. What is included with
N991xA Option 112?
• 1-port and enhanced response QuickCal with a T/R analyzer (one that has Option 210)
QuickCal is most accurate for DUTs with 7/16 and Type-N connectors and measurement uncertainties
are provided for frequencies ≤ 18 GHz. Reduced accuracy for DUTs with 3.5 mm (m), SMA (m), or other
male coaxial connectors; performance is unspecified. QuickCal is not recommended for DUTs with
3.5 mm (f), SMA (f), or other similar female connectors. QuickCal is not applicable to waveguide.
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Question Answer
Extended Range Transmission Analysis (ERTA) or Option 209 is a scalar measurement system
used in an ERTA pair, the ERTA system frequency range is limited to the lowest of the pair.
Required hardware
A. Two (2) FieldFox units. FieldFox units can be any of these models:
• ERTA cannot use N9912A, N9923A, N9925A, N9926A, N9927A or N9928A
The two FieldFox units used in ERTA do not have to be the same model.
ERTA requires the following options on Combo FieldFox models (N9913A, N9914A, N9915A,
• Option 233, spectrum analyzer
With either the Combo or SA FieldFox units, the following options are highly recommended:
frequency accuracy and permitting the use of a narrower RBW
B. Power splitter, two-resistor model, Keysight 11667A, 11667B, or 11667C. Other power splitters
11667A, 11667B, or 11667C. Three-resistor power splitters are not recommended.
C. N9910X-712, Trigger/Reference-in cable, SMA (m) to BNC(f), 1 m, quantity two
D. N9910X-713, Trigger/Reference-out cable, SMB (m) to BNC (m), 1 m, quantity two
E. LAN connection – For ERTA, the two FieldFox units communicate via a LAN connection. For a
area network.
F. N9910X-825, GPS Antenna
FieldFox analog demodulation has two parts: (1) Tune and listen, and (2) AM/FM metrics. Tune and
demodulated baseband signal waveform, carrier power, frequency deviation, SINAD and more.
Real-time spectrum analyzer (RTSA) or Option 350 provides real-time measurements on a
include a frequency-mask trigger (FMT).
All N995xA and N996xA analyzers include CPU2. On other FieldFox models, if the serial number
N9910HU-100/200/300/400 to have CPU2.
based on the use of two (2) FieldFox units. One FieldFox acts as the source and reference receiver,
while the second FieldFox acts as the measurement receiver. When different frequency models are
• FieldFox microwave combination analyzers: N9913A, N9914A, N9915A, N9916A, N9917A,
N9918A, N9950A, N9951A, N9952A
• FieldFox microwave spectrum analyzers: N9935A, N9936A, N9937A, N9938A, N9960A,
N9961A, N9962A
N9916A, N9917A, N9918A, N9950A, N9951A, N9952A):
• Option 210, VNA transmission/reflection
ERTA requires the following options on SA FieldFox models (N9935A, N9936A, N9937A, N9938A,
N9960A, N9961A, N9962A)
10. What are the requirements for
Option 209?
• Option 220, tracking generator
Both FieldFox units (the one used as the source, and the other used as the receiver) must have the
options listed above. The ERTA option (209) cannot be installed unless 210 and 233 are present on
a combo analyzer; or 220 is present on a SA analyzer.
• Option 235, preamplifier – this option increases the measurement dynamic range by increasing
the received signal power
• Option 307, GPS receiver – this option increases the dynamic range by increasing the
can be used but the specifications listed are based on the match and tracking performance of
direct connection, a cross-over LAN cable is required. Alternately, both analyzers can be on a local
Recommended accessory
11. What is included with Option
355?
12. What is included with Option
350?
13. How do I determine if my
FieldFox has CPU2 fast
processor?
listen is available with the purchase of the spectrum analyzer option 233. AM/FM metrics becomes
available when Option 355 is purchased. AM/FM metrics provides the user with RF spectrum view,
FieldFox. The FieldFox must be equipped with spectrum analysis capability. The preamplifier option is
recommended, as elusive signals often have low power levels. The maximum real-time bandwidth
for option 350 is 10 MHz. RTSA includes trace recording and playback capabilities. It does not
starts with MY5607/SG5607/US5607, then it has CPU2. If the serial number prefix is different, then
the analyzer firmware needs to be checked to see if the instrument has been upgraded with
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Question Answer
Spectrum Analyzer mode (Option 233) does not include Trace Recording and Playback by default.
be purchased.
RTSA
Record and playback spectrum traces
Yes
Yes
Save trace data with GPS time stamp over time
Yes
Yes
Record and playback spectrogram data
Yes
No 1
Requires spectrum analyzer mode (Option 233 on combination models), internal preamplifier
DC bias variable voltage source to noise source connection.
Requires spectrum analyzer mode (Option 233 on combination models). Also requires phased array
N995xA and N996xA models, since phased array antenna operates at 28 GHz.
FieldFox’s mapping function is available in the following modes: Channel Scanner (312), Phased-
match the current GPS coordinates.
Requires triaxial antenna, not sold or provided by Keysight. Supported antenna is AGOS advanced
are supported with spectrum analyzer mode (Option 233 on combination models).
Recommend 32, 44 or 50 GHz FieldFox model (N995xA and N996xA) to support 5GTF FR2
interface is 2.92 mm (f).
Surveyor 4D software connected to FieldFox spectrum analyzer mode offers a versatile, truly
(N6820ES-USD). Requires Surveyor 4D software version 4.3 or later (May 2019).
To obtain this capability in SA mode, Option 236 Interference Analyzer and Spectrogram needs to
RTSA mode (Option 350) does include Trace Recording and Playback by default in RTSA mode.
Purchasing RTSA mode (Option 350) does not enable Trace Recording and Playback in SA mode
14. Is Spectrum Analyzer Trace
(Option 233).
Recording and Playback
standard or an option?
Trace record/playback features
(Option 235) and DC bias variable voltage source (Option 309) as well as CPU2 processor. An
15. What are the requirements for
Noise figure (NF) Option 356?
external noise source is also required and FieldFox supports Keysight noise source models
346A/B/C/K40/K01. Also recommended to improve accuracy is an external preamplifier Keysight
models U7227A/C/F or U7228A/C/F. Requires accessory item N9910X-713 BNC to SMB cable for
SA mode
SA and Interference Analyzer
Options 233 and 236
mode
RTSA
Option 350
16. What is required for phased
array antenna support (Option
360)?
17. What is included with indoor
and outdoor mapping (Option
352)?
18. What is required for EMF
measurements (Option 358)?
19. What is required for 5GTF
over-the-air (OTA)
measurements (Option 377)?
20. What is required for N6820ES
Surveyor 4D software?
antenna, can be ordered as Keysight 85571A-028 or directly from Anokiwave as AWMF-0129.
Recommend GPS receiver (Option 307) and internal preamplifier (Option 235). Supported only on
Array Antenna (360), OTA LTE FDD/TDD (370/371), and OTA 5GTF (377). Mapping is currently not
available in SA or RTSA modes. Outdoor mapping requires the availability of GPS (Option 307).
Maps can be saved to the FieldFox internal memory, SD card or USB drive. Using a direct wired LAN
connection, FieldFox will automatically access OSM once location coordinates (latitude and
longitude) and zoom levels have been entered the Map Explorer menu. If using the l
Support Tool
, OSM map files can be downloaded to a .zip file and imported to FieldFox internal
FieldFox Map
memory. If the FieldFox GPS receiver is enabled and OSM maps have been previously saved to
FieldFox with those GPS coordinates, FieldFox can automatically load the corresponding map to
technologies Triaxial Isotropic Antenna model SDIA-6000 30 MHz to 6 GHz. EMF measurements
frequency of 28 GHz. Requires spectrum analyzer mode (Option 233 on combination models). Also
recommend GPS receiver (Option 307) and internal preamplifier (Option 235). FieldFox models
26.5 GHz and below will require external mixer to down convert millimeter wave frequency to
intermediate frequency (IF). For Keysight direct sales, mixer is orderable as Keysight model
N9910XM28-H2A for 3.5 mm test ports or N9910XM28-H2N for Type-N test ports. For indirect
sales, the mixer is orderable as OML Inc. model M28H2ADC-K, please see website
www.omlinc.com for more information or contact a Keysight representative. OML mixer RF input
portable spectrum monitoring system that covers VLF to 50 GHz, including 5G millimeter wave
bands. The software runs on an external PC or tablet. FieldFox required options include spectrum
analyzer mode (Option 233 on combination models), preamplifier (Option 235) and built-in GPS
receiver (Option 307). Core Surveyor 4D software for Windows (Option N6820ES-114) is required
to run the Surveyor 4D software. Other Surveyor 4D software optional licenses that are supported
include basic modulation recognition application (N6820ES-MR1) and universal signal detection
1. RTSA trace recordings can be recalled and played back in SA mode Spectrogram. This has the added benefit that the
measurements are shown ‘slower’, making it easier for the human eye to decipher the signal content.
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