Technical Overview: Keysight/Agilent N9912A 4/6 GHz RF Fieldfox

Technical Overview: Keysight/Agilent N9912A 4/6 GHz RF Fieldfox
Keysight Technologies
N9912A 4/6 GHz RF Analyzer FieldFox
Technical Overview
Boost Your Readiness
Every piece of gear in your kit had to prove its worth. Measuring up and earning
a spot is the driving idea behind the Keysight Technology, Inc. FieldFox RF
analyzers. It starts with adaptability: every operating mode is flexible enough
to meet the needs of novices and experts alike. To accelerate your work,
each mode has a task-driven interface that saves time in the field. Best of all,
FieldFox is designed to withstand your toughest working conditions.
Step up to FieldFox – and achieve more in the field.
World’s Most Integrated Handheld RF Analyzer
Key measurements
Cable and antenna test, distance-to-fault, return loss, cable loss
Vector network analysis with Smith chart display and time domain
Vector voltmeter
Spectrum analyzer, CHP, ACPR, OBW
Interference analyzer, spectrogram, waterfall, record and playback
Independent source, CW and tracking
Power meter (USB), channel power meter (built-in), and pulse
Key differentiators
Integrated QuickCal calibrates without a calibration kit
Immediate measurements with CalReady
50 percent faster than traditional
handheld instruments
Superior dynamic range (96 dB) and sensitivity (-148 dBm) in the spectrum
analysis mode
Cable and antenna analyzer
Vector network analyzer
2 MHz to 4/6 GHz
Spectrum analyzer
100 kHz* to 4/6 GHz
*Useable to 5 kHz
Signal source
2 MHz to 4/6 GHz
Pick up FieldFox for its ergonomics
7.4” W
188 mm
Connector covers
help keep dust out
Anti-glare 6.5 inch
LCD display with
LED backlight
Convenient side
strap makes it
easy to hold
and carry
11.5” H
292 mm
Task-driven keys
are grouped to
easily and
naturally perform
standard ield
Portrait design and
large buttons for
easy operation —
even with gloves on
Dedicated marker keys for quick
marker function access
Backlit keypad
…and depend on its durability and convenience
2.8” D
72 mm
RF Out
External reference
and external trigger
Connector bay protects
RF connectors
Easily accessible
battery compartment
Spacious connector design makes
connections fast and simple
SD lash card slot for
additional data storage
LAN port for data transfer,
SCPI programming and
remote control from iPad
shoulder strap clips
Simplify interference
analysis with AM/FM
tune and listen
USB ports for data transfer, GPS
receiver, and USB power sensors
Gasketed doors protect
ports from moisture
Key Measurements
Cable and antenna analyzer
Fifty to sixty percent of cell site
problems are caused by faulty cables,
connectors, and antennas. Degraded
feed lines cause poor coverage, unnecessary handovers, paging failures,
and access failures on uplink. To avoid
service quality problems, it is critical
to keep cell sites’ cable and antenna
systems in good condition.
Use FieldFox to make return loss,
VSWR, insertion loss/transmission,
one-port cable loss, and distance-tofault (DTF) measurements. You can test
antennas, cables, filters, and amplifiers with a single instrument.
Insertion loss display
View and control the RL
and DTF displays independently
Return loss and DTF
FieldFox can make both return loss
and distance-to-fault measurements
at the same time. This helps you
correlate overall system degradation
with specific faults in the cable and
antenna system.
The built-in cable editor allows you
to edit existing cable types on-site,
and save them as new cable types
with user defined names.
Measurements in the ield without the need to manually calibrate
Each instrument is CalReady at the
RF Out port, immediately following
power-on or preset. This means it’s
already calibrated and ready to make
measurements such as one-port cable
loss, VSWR, return loss, and DTF
measurements at the test port.
Industry’s irst and only
The industry’s first and only builtin calibration system allows you to
calibrate the cable/antenna tester
without carrying a calibration kit into
the field. As with any test instrument,
when you add an additional device
to the test port, such as a jumper
cable or attenuator, you need to
calibrate using a calibration kit (cal
kit). QuickCal eliminates the hassle
of carrying and using a cal kit, plus
provides worry-free accuracy every
Broadband calibration
FieldFox allows you to make
broadband calibrations, which means
the instrument is calibrated over
the maximum frequency span. After
a broadband calibration, you can
change the frequency range or number
of points without recalibrating the
Calibration Wizard
Built-in spectrum analyzer
Interference is a major source of cell site problems. Interference can be internal or external, and uplink or downlink. Downlink interference reduces coverage, while uplink interference causes access failure. Inter-ference has a direct
impact on the quality of service of wireless communication services.
FieldFox has an optional built-in spectrum analyzer that covers frequency ranges from 5 kHz to 6 GHz. It provides a fast spectrum scan to detect interference
and RF burst capture to measure intermittent signals. It displays four traces at
the same time, and you can choose different detector modes.
Field strength measurements
RF spectrum monitoring aided by spectrogram
Field strength characterization is a common test performed by operators in
the field. To make accurate measurements, the gain and loss of the antenna
and cables need to be accounted for. With FieldFox, antenna factors and
cable loss data can be loaded using either the front panel or the Data Link
Interference analyzer
FieldFox interference analyzer is designed for identifying interference signals
quickly in the field. It has the best dynamic range on the market (96 dB) with
very fast sweep times under narrow resolution bandwidths (RBWs).
FieldFox provides a spectrogram and waterfall display to detect intermittent interference signals or monitor signals of interest for longer periods of time. Signal
traces can be recorded into internal memory or external flash memory devices,
the saved traces can be played back for offline processing.
FieldFox also allows you to listen to demodulated AM/FM signals to identify
signal types.
Select one of the pre-loaded radio frequency standards, or create your
own custom standard
Use the spectrum analyzer’s audio signal strength indicator to locate
signals when walking around
Independent signal source and tracking generator
FieldFox has a built-in independent signal source, with a frequency range of
2 MHz to 4/6 GHz. The signal source and spectrum analyzer can be on at the
same time. The signal source can be tuned to any frequency, independent of
the spectrum analyzer frequency.
The signal source can be used to create a test signal to measure coverage, antenna isolation, antenna direction alignment, frequency offset device verification, and long cable loss measurement.
FieldFox’s source can generate both a CW signal and a swept frequency
signal, similar to a traditional tracking generator. This feature is standard on
FieldFox RF analyzers with spectrum analyzer Options 230 or 231.
FieldFox’s independent CW signal source, coupled,
viewed in “Night Vision” display mode
Channel power meter
With Option 311, FieldFox is able to make channel power measurements (CPMs)
easily, without the need for an external USB power sensor. Users can set the
center frequency directly or select from a list of pre-defined radio standards
such as GSM or LTE. Additionally, with CPM, the channel bandwidth can be
controlled, thereby reducing errors caused by out-of-band signals.
Limit lines simplify testing
Limit lines or masks can be used for quick pass/fail testing of devices or frequency spectrums. FieldFox allows you to define fixed and relative limit lines,
for both the RF spectrum traces and S-parameters. Additionally, with a single
key press, you can build a limit line table from a current trace, and add offsets or
margins to simplify your testing process.
Channel power measurements are easily displayed on a large analog
display, viewed in “Outdoor Sun” display mode
Use limit lines or masks to perform spectrum conformance tests
Network analyzer time domain
With the time domain Option, FieldFox computes the inverse Fourier transform
of the frequency-domain data to display reflection or transmission coefficients
versus time. Time domain gating can be used to remove unwanted responses
such as connector mismatch or cable discontinuities, and the results can be
displayed in either time or frequency domain. FieldFox’s time domain function
supports both low pass mode and band pass mode, enabling users to measure
both broadband and frequency-selective devices.
Network analysis
S11, S11 phase, Smith chart and polar display are available with Option 303
(Network analysis capability). To obtain S21or insertion loss/gain, users need to
order Option 110 (transmission measurement), in addition to Option 303.
For in-fixture measurements, use FieldFox’s port extension or electrical delay
capability to easily extend the reference plane to the device interface to
provide accurate measurements. You can use the electrical delay capability
to measure deviation from linear phase by removing the linear portion of the
phase delay.
If you need to measure the magnitude and phase of all four S-parameters, consider the N9923A FieldFox RF VNA. Please refer to Keysight FieldFox RF Vector
Network Analyzer, literature part number 5990-5087EN.
Use time domain gating to remove unwanted responses. Before gating: Traces 1 and 3,
After gating: Traces 2 and 4.
The marker bandwidth/Q factor function simplifies filter testing and tuning.
Device input impedance displayed on a Smith chart
Power meter with USB power sensor
FieldFox can connect with the Keysight USB power sensors to make average
power measurements up to 40 GHz. Using USB peak power sensors, users can
measure both the average and the peak power of a modulated signal.
Pulse measurements
FieldFox’s pulse measurement option allows users to efficiently characterize
pulsed-RF signals such as those used in radar and electronic warfare systems,
leveraging Keysight’s USB peak power sensors (available in 18 and 40 GHz
models). Measurements include peak power, peak to average ratio, and pulse
Pulse measurement
Transmission measurement
FieldFox provides a 2-port transmission measurement that measures insertion
loss, amplifier gain, filter passband, and loss. It also makes a S21 scalar
measurement if Option 303 is enabled.
Vector voltmeter
Using FieldFox’s vector voltmeter (VVM), the phase shift and electrical length
of a device can be measured.
By utilizing the “Zero” function, the phase and electrical length of one device
can be measured relative to a “golden device”. View results on the large
display which can be seen as far as ten feet away.
VVM applications:
– Cable trimming of phase matched cables
– Verifying the isolation of 2-port components
– Radio navigation – VHF omnidirectional radio
range (VOR) and instrumentation landing
system (ILS)
FieldFox offers much of the VVM functionality of the popular Keysight 8508A,
in a handheld portable form factor, and without the need for the source/
bridge/accessories required with the 8508A.
Transmission measurement
Feature and Beneit Summary
Comprehensive measurement capabilities
Cable and antenna test
– Return loss, VSWR
– Distance-to-fault
Return loss/VSWR measurements allow you to evaluate the
impedance matching performance of the feed line across the
frequency range of interest.
Distance-to-fault measurements help you identify the faults
along a feed line. Use these measurements to precisely pinpoint
the location of damaged or degraded antennas, connectors,
ampliiers, ilters, and duplexers, etc.
Perform and view return loss and distance-to-fault
measurements at the same time
FieldFox provides up to 1001 data-point resolution to help accurately locate faults and extend measurement distance.
Transmission test
– Cable loss
– Insertion loss
– Ampliier gain
Transmission test is used to accurately measure cable loss,
insertion loss (ilters), and ampliier gain (tower mounted
ampliier). FieldFox offers two-port transmission magnitude
measurements with up to 72 dB dynamic range.
One-port cable loss
For already-installed cables, FieldFox accurately measures
cable loss via the RF Out port. The instrument measures actual
cable loss, without the need for additional computation.
CalReady at test port
Each instrument is calibrated at the RF Out port. When you
power up the instrument, it is ready to make measurements
such as one-port cable loss, VSWR, return loss, and DTF at the
test port.
The industry’s-irst and only built-in calibration system allows
you to calibrate the cable and antenna tester without carrying
a calibration kit with you all the time. It provides worry-free
accuracy and excellent repeatability.
Open-short-load (OSL) is standard in FieldFox. There are four
calibration kits deined in the instrument.
Spectrum analysis
The built-in spectrum analyzer allows you to scan up to 6 GHz
and detect internal and external interference. FieldFox can detect signals as low as -148 dBm up to 6 GHz, with phase noise
of -88 dBc at 10 kHz, and a third order intercept (TOI) better
than +18 dBm.
Limit lines
Use limit lines or masks for pass/fail testing. You can set up
both ixed and relative limit lines, or build a limit line table from
a current trace.
Interference analyzer
Spectrogram and waterfall displays allow you to detect and
monitor intermittent interference signals. The interested signals
can be recorded and played back.
Field strength
Antenna factors and cable loss data can be loaded using either
the front panel or the Data Link software. Field strength can be
displayed in dBuV/m, dBuA/m, dBG or dBpT.
Enables operators to ind exact locations and time/location
stamp their measurement reports. The GPS information can be
displayed on the screen and saved as part of the image, data or
recorded signal.
Locate interference signals
Waterfall display
Comprehensive measurement capabilities continued
Channel power measurement
Independent signal
Provides a test signal to measure coverage, antenna isolation, long
cable loss, frequency offset, and align antenna direction.
Power suite
Built-in spectrum analyzer provides one-button power suite measurements such as; channel power, ACPR and OBW for LTE, WiMAX,
WCDMA, TD-SCDMA, cdma2000 and GSM measurements.
Custom radio
Use one of the pre-loaded radio standards such as GSM 1900 or
WCDMA 850, or create your own custom radio standard using a
csv ile.
AM/FM tune and
The built-in spectrum analyzer can demodulate AM/FM modulated signals and play the audio via speaker or headset. This
feature is very useful to identify types of signals.
Channel power meter
Channel power meter measurements provide absolute power
measurements over a deined frequency bandwidth, without the
need for an external power sensor.
Power meter
Makes accurate true average power measurements without
bringing a power meter along. The state-of-the-art Keysight USB
power sensors provide measurements up to 24 GHz.
Pulse characterization
Using USB peak sensors and FieldFox, you can measure peak
power, peak to average ratio, and pulse proile parameters such
as rise time, fall time and pulse repetition frequency.
Smith chart
Smith charts can be used to display impedance matching characteristics in cable and antenna systems.
Vector voltmeter
The large vector voltmeter display makes it easy to match two or
more device’s electric length and ensure signals that travel on
different devices have the same delay.
Electrical delay
Using the electrical delay function, you can remove the linear
portion of the phase shift and view the deviation from linear
Port extension
Allows you to extend the reference plan after calibration. This
feature is useful for measurements such as in-ixture test, where
calibrating at the DUT or reference plane is cumbersome.
Network analyzer time
Using the time domain feature, you can display relection or
transmission coeficients versus time. Time domain gating can
be used to remove unwanted responses such as connector
mismatch or cable discontinuities.
Make accurate true average power measurements
without bringing along a power meter
Keysight’s FieldFox pulse measurements simplify
radar field testing.
Field-proof usability
Transflective display makes it easy to read measurements in direct sunlight
Translective display and
backlit keys
The display is designed for easy viewing in indoor and outdoor settings and
in direct sunlight and darkness. Access different display modes via softkeys.
Task-driven key design
Front-panel keys are grouped to easily and naturally perform standard ield
Speaker and
headphone jack
Used for demodulated audio signal capability.
Provides task-driven user interface to simplify the measurements.
Rugged design
Water-resistant chassis,
keypad and case design
The case is made from polycarbonates that withstand wide temperature
ranges and salty, humid environments.
RF connector
A specially designed connector bay protects the RF connectors from damage during drops or other external impacts.
Dust-free design
With no vents or fans in the case, FieldFox resists dust for better equipment
Meets tough environmental standard
Meets MIL-PRF-28800F Class 2 speciication.
Gasketed doors
Protects instrument interface from moisture.
Modern connectivity
Water resistant chassis withstands wide temperature
ranges and humid environments
USB 2.0 ports
Two USB 2.0 ports; can be used for data transfer, GPS receiver and USB
power sensor support.
LAN port
Used for SCPI programming, Data Link connection, and remote control via
iOS device.
SD lash card slot
Use as a data storage device.
FieldFox Data Link software
Transfer data remotely from the instrument to a PC for backofice applications such as baseline analysis and report generation.
Remote control
Remotely monitor and control FieldFox using an iOS device such as iPad or
iPhone, via a LAN network connection.
A condensed version of the specifications is provided here. See the User’s Guide for the complete version;
Speciication (spec.):
Warranted performance. Specifications include guardbands to account for the expected statistical performance
distribution, measurement uncertainties, and changes in
performance due to environmental conditions. The following conditions must be met:
Typical (typ.):
Expected performance of an average unit over a 20 °C to 30 °C
temperature range, unless otherwise indicated; does not include
guardbands. It is not covered by the product warranty. The
FieldFox must be within its calibration cycle.
– FieldFox has been turned on at least 10 minutes (unless
otherwise stated)
– FieldFox is within its calibration cycle
– Storage or operation at 25 °C ±5 °C range (unless otherwise stated)
Nominal (nom.):
A general, descriptive term or design parameter. It is not tested,
and not covered by the product warranty.
Cable and antenna analyzer (Option 104 or 106)
Frequency range
Option 104
2 MHz1 to 4 GHz
Option 106
2 MHz2 to 6 GHz
Frequency reference
Aging rate
±2 ppm
±1 ppm/yr
Temperature stability ±1 ppm over -10 to
55 ºC
Frequency resolution
2 MHz to 1.6 GHz
2.5 kHz
> 1.6 GHz to 3.2 GHz
5 kHz
> 3.2 GHz to 6 GHz
10 kHz
Measurement speed
Return loss
1.5 ms/point (nominal)
1.75 GHz to 3.85 GHz, 1001 points, Cal
2.4 ms/point (nominal)
0 to 500 ft, 601 points, Cal ON
Data points
101, 201, 401, 601, 801, 1001 (up to 10,001
using SCPI)
> 42 dB
QuickCal (Option 111)
> 42 dB (typical)3
Source match
> 36 dB
QuickCal (Option 111)
≥ 35 dB (typical) 3
Relection tracking
± 0.06 dB
QuickCal (Option 111)
± 0.15 dB (typical) 3
1. Spectrum analyzer (Option 230) start frequency is 100 kHz, usable to 5 kHz.
2. Spectrum analyzer (Option 231) start frequency is 100 kHz, usable to 5 kHz.
3. Requires 90 minute warm up
Dynamic range
Relection (RF Out port)
2 MHz to 4 GHz
60 dB (typical)
> 4 GHz to 6 GHz
55 dB (typical)
Transmission measurement (Option 110)
2 MHz to 2 GHz
72 dB (typical)
> 2 GHz to 3 GHz
67 dB (typical)
> 3 GHz to 5 GHz
58 dB (typical)
> 5 GHz to 6 GHz
49 dB (typical)
Output power range
High power
2 MHz to 4 GHz
< +8 dBm, +6 dBm (nominal)
> 4 GHz to 6 GHz
< +7 dBm, +2 dBm (nominal)
Low power
2 MHz to 4 GHz
< -23 dBm, -25 dBm (nominal)
> 4 GHz to 6 GHz
< -24 dBm, -29 dBm (nominal)
Immunity to interference
+16 dBm (nominal)
Maximum input level (RF Out port)
+23 dBm
Maximum input DC voltage (RF Out port)
±50 VDC
Cable and antenna measurements
Return loss
Display range
0 to 100 dB
0.01 dB
Display range
0 to 100
Distance to fault (DTF)
Range = (number of points - 1)/ (span*2) x Vf (velocity factor in cable) x c (light speed)
Resolution = range/(number of points - 1)
Number of points: 101, 201, 401, 601, 801, 1601, 4001, 10,001 (custom number of points
can be set using SCPI)
Distance-to-fault display: return loss, VSWR, relection coeficient
Cable loss (1-port)
Terminated cable under test with short
Insertion loss (2-ports)
Requires Option 110
Transmission measurement (Option 110)
Frequency range
Option 104
2 MHz to 4 GHz
Option 106
2 MHz to 6 GHz
Dynamic range
2 MHz to 2 GHz
72 dB (typical)
2 GHz to 3 GHz
67 dB (typical)
> 3 GHz to 5 GHz
58 dB (typical)
> 5 GHz to 6 GHz
49 dB (typical)
Network analysis (Option 303)
Vector measurement, S11 magnitude and S11 phase. Speciication is listed under Cable
and antenna analyzer section (S11/Return loss).
Scalar measurement, S21 magnitude. Speciication is listed under transmission measurement. S21 requires Option 110 transmission measurement.
Relected power
Source power
Log, linear, phase, VSWR, Smith chart, polar, group delay, unwrapped phase
Calibration types
Mechanical cal
IF bandwidth selections
300 Hz, 1 kHz, 3 kHz, 10 kHz and 30 kHz
Data points
101, 201, 401, 601, 801, 1001, 1601, 4001, 10,001 (custom number of points can be set using SCPI)
Vector network analyzer time domain (Option 010)
Using time domain, data from transmission or reflection measurements in the frequency domain are converted to the
time domain. The time-domain response shows the measured parameter value versus time.
Time stimulus modes
Low-pass step
This stimulus, similar to a traditional time domain relectometer (TDR) stimulus waveform,
is used to measure low-pass devices. The frequency-domain data should extend from DC
(extrapolated value) to a higher value.
Low-pass impulse
This stimulus is also used to measure low-pass devices.
Bandpass impulse
The bandpass impulse stimulates a pulsed RF signal and is used to measure the timedomain response of band-limited devices.
The windowing function can be used to ilter the frequency-domain data and thereby reduce overshoot and ringing in the time-domain
The gating function can be used to selectively remove relection or transmission time-domain responses. In converting back to the frequency domain the effects of the responses outside the gate are removed.
Spectrum analyzer (Option 230 or 231)
Frequency range
Option 104
100 kHz to 4 GHz, usable to 5 kHz
Option 106
100 kHz to 6 GHz, usable to 5 kHz, tunable to 6.1 GHz
Frequency reference
±2 ppm
Frequency aging
±1 ppm/yr
Frequency reference
Temperature stability
±1 ppm over -10 to 55 °C
Frequency readout accuracy
± (readout frequency x frequency reference accuracy + RBW centering + 0.5 x horizontal resolution)
Frequency span
0 Hz (zero span), 10 Hz to maximum frequency
Span accuracy
±(2 x RBW centering + horizontal resolution)
Span resolution
1 Hz
Resolution bandwidth (RBW)
Range (-3 dB bandwidth)
Zero span
300 Hz to 1 MHz in 1-3-10 sequence; 2 MHz
Non-zero span
10 Hz to 300 kHz in 1/1.5/2/3/5/7.5/10 sequence; 1 MHz, 2 MHz
1 kHz to 1 MHz: ±5% (nominal)
10 Hz to 100 KHz non-zero span: ±1% (nominal)
2 MHz: ±10% (nominal)
300 Hz zero span: ±10% (nominal)
Selectivity (-60 dB/ -3 dB)
4:1 (nominal)
Video bandwidth (VBW)
1 Hz to 2 MHz in 1/1.5/2/3/5/7.5/10 sequence
Noise sidebands, CF = 1 GHz
10 kHz offset: -88 dBc/Hz ( typical)
30 kHz offset: -89 dBc/Hz, (typical)
100 kHz offset:
1 MHz offset: -115 dBc/Hz, (typical)
Sweep acquisition, span > 0 Hz
1 to 5000, number of data acquisitions per trace point; value is normalized to the minimum
required to achieve amplitude accuracy with CW signals
Measured value representing time required to tune
Trace updates
Span = 20 MHz, RBW = 3 kHz: 1.5 updates/second
Span = 100 MHz, RBW auto coupled: 7 updates/second
Span = 6 GHz, RBW auto coupled: 1 update/second
Trace points
101, 201, 401, 601, 801, 1001 points, default is 401
Measurement range
Displayed average noise level (DANL) to +20 dBm
Input attenuator range
0 to 31 dB, 1 dB steps
Maximum DC voltage at RF In port
±50 VDC
Maximum input power at RF In port
+27 dBm (0.5 W)
Displayed average noise level (DANL)
10 Hz RBW, 10 Hz VBW, 50 ohm termination input, 0 dB attenuation, average detector
Preampliier OFF
20 to 30 °C
10 MHz to 2.4 GHz
-130 dBm (typical)
> 2.4 GHz to 5.0 GHz
-125 dBm (typical)
> 5.0 GHz to 6.0 GHz
-119 dBm (typical)
Preampliier ON (Option 235)
20 to 30 °C
-148 dBm (typical)
10 MHz to 2.4 GHz
> 2.4 GHz to 5.0 GHz
-145 dBm (typical)
> 5.0 GHz to 6.0 GHz
-138 dBm (typical)
-10 to 55 °C
10 MHz to 2.4 GHz
< -141 dBm
> 2.4 GHz to 5 GHz
< -138 dBm
> 5 GHz to 6 GHz
Total absolute amplitude accuracy
< -130 dBm
Peak detector, 10 dB attenuation, preampliier off, RBW < 2 MHz, input signal 0 dBm to -50 dBm, all settings auto-coupled
20 to 30 ºC
2 MHz to 10 MHz
±1.8 dB
±0.60 dB (typical)
> 10 MHz to 3.0 GHz
±1.5 dB
±0.50 dB (typical)
> 3.0 GHz to 5.0 GHz
±1.9 dB
±0.60 dB (typical)
> 5.0 GHz to 6.0 GHz
±2.1 dB
±0.60 dB (typical)
Second harmonic distortion (SHI)
-30 dBm signal at input mixer
2 MHz to 1.35 GHz
< -70 dBc, +40 dBm SHI (nominal)
1.35 GHz to 3.0 GHz
< -80 dBc, +50 dBm SHI (nominal)
1. Requires 90 minute warm up
Third order intermodulation distortion (TOI)
Two -30 dBm tones at input mixer, > 100 kHz tone separation
< -96 dBc, +18 dBm TOI (nominal)
Residual responses
Input terminated, 0 dB attenuation, preampliier off, RBW ≤ 1 kHz, VBW auto-coupled
20 MHz to 3 GHz
-90 dBm (nominal)
> 3 GHz to 6 GHz
-85 dBm (nominal)
Spurious responses
Input mixer level -30 dBm
RFsig = RFtune + 417 MHz
-70 dBc (nominal)
RFsig = RFtune + 1.716 GHz
-80 dBc (nominal)
Input mixer level -10 dBm, irst IF image response
RFsig = RFtune – 2 x 0.8346 GHz,
for RFtune 5.7 to 6.0 GHz
-50 dBc (nominal)
-80 dBc (nominal)
-60 dBc (nominal) when battery charging, 260 kHz offset
Preampliier (Option 235 requires Option 230 or 231)
Option 230
100 kHz to 4 GHz
Option 231
100 kHz to 6 GHz
22 dB (nominal)
Reference level
-170 dBm to +30 dBm
0.1 dB
0 dB (no error)
4 traces, data/max/average/min
Normal, positive peak, negative peak, sample, average
Marker types
Normal, noise marker, band/interval marker, frequency counter marker
Number of markers or delta markers
Marker functions
Peak, next peak, peak left, peak right, marker to center, minimum search
1.5:1 (50 ohm)
Independent signal source or tracking generator
The independent source or tracking generator is included with either spectrum analyzer option 230 or 231. The source
can be used in continuous wave (CW) or stimulus/response (S/R) mode. In CW mode, the source frequency is independent of the receiver frequency. The source can be tuned to a frequency that is different from the receiver. In stimulus/
response mode, the source operates the same as a traditional tracking generator - the receiver tracks the source.
Frequency range
2 MHz to 4 GHz (Option 230) or 2 MHz to 6 GHz (Option 231)
High power
2 MHz to 4 GHz < +8 dBm, +6 dBm (nominal)
>4 GHz to 6 GHz <+7 dBm, +2 dBm (nominal)
Low power
2 MHz to 4 GHz <-23 dBm, -25 dBm (nominal)
>4 GHz to 6 GHz < -24 dBm, -29 dBm (nominal)
0 to 31 dB
Continuous wave, stimulus / response
External, video trigger, FFT gating with video (IF envelope) trigger
Channel power meter (Option 311)
Channel power meter is a built-in power measurement that does not require an external power sensor. Users can set the
center frequency and channel bandwidth. The results are shown on a large analog display.
Frequency range
100 kHz to 4/6 GHz
Power accuracy1
Frequency range
2 MHz to 10 MHz
±1.8 dB
±0.60 dB
> 10 MHz to 3.0 GHz
±1.5 dB
±0.50 dB
> 3.0 GHz to 5.0 GHz
±1.9 dB
±0.60 dB
> 5.0 GHz to 6.0 GHz
±2.1 dB
±0.60 dB
Power meter measurement with USB sensor (Option 302)
Support for Keysight USB average and peak power sensors. Frequency and power range dependent on sensor.
List of supported sensors:
Pulse measurements with USB peak power sensor (Option 330)
FieldFox’s pulse measurement option can be used to characterize RF pulses such as those used in radar and electronic
warfare systems. Measurements are made using FieldFox and Keysight’s UBS peak power sensors.
Performance specifications such as frequency, dynamic range and minimum pulse width depend on the peak power sensor. Supported peak power sensors:
Remote control capability with iPad or iPhone (Option 030)
Users can now remotely monitor and control their FieldFox using their iOS device such as an iPad, iPhone, or iPod
Touch. FieldFox’s Remote Viewer iOS app emulates the front panel of the unit, so users can simply press any FieldFox
key right from their iOS device, including the hardkeys or softkeys.
With this technology, FieldFox can now be placed in areas where users do not wish to stay long due to extremely harsh or
unsafe conditions. Additionally, if one technician or engineer has trouble making a measurement or determining the source of a
problem, another can step in to remotely troubleshoot and solve the problem, which helps minimize rework and multiple trips.
1. Speciication requires 90 minute warm-up
When the application is launched, users can access the FieldFox demo videos and technical literature such as user
guides, application notes, and datasheets. Accessing this information via the FieldFox app helps engineers and technicians in the field quickly find the data they need to resolve issues as they arise. Such capabilities also make the app
ideal for training and educational purposes.
The iOS device and FieldFox communicate via a WLAN or broadband data connection. Without Option 030, users can
remotely view the live display screen of their FieldFox, but cannot control the instrument.
General speciications
Connector type
Type-N (female)
Input impedance
50 ohm
External reference
Input type
BNC female
Reference frequency
10 MHz
Required level
-5 dBm to 10 dBm
6.5” translective, color VGA LED backlit 640 x 480 with anti-glare coating
Built-in speaker
Headphone jack
Built-in headphone jack
2 x USB 2.0; 1 x mini USB; 1 x LAN
Latitude, longitude, elevation and accurate time are provided. The GPS information can be displayed on the screen, and saved as part of
the image, data, or recording ile. The GPS capability is standard with all N9912A FieldFox RF analyzers. An external USB GPS receiver is
required. Keysight recommends the Microsoft Streets & Trips, or Microsoft AutoRoute with GPS locator.
Internal storage
Minimum 16 MB, up to 1000 traces
External storage
1 x micro SD slot and 2 x USB 2.0
Complies with European EMC Directive 2004/108/EC
– IEC/EN 61326-2-1)
– CISPR Pub 11 Group 1, Class A
– ICES/NMB-001
– IEC/EN 61000-4-2, functional up to 20 kV test
Complies with European Low Voltage Directive 2006/95/EC
• IEC/EN 61010-1 2nd Edition
• Canada: CSA C22.2 No. 61010-1-04
• USA: UL 61010-1 2nd Edition
General speciications continued
Meets MIL-PRF-28800F Class 2 speciication
95% at 40 °C
-10 ºC to +55 ºC
-51 ºC to 71 ºC
6.2 lbs / 2.8 kg including battery
Dimensions (H x W x D)
11.5” x 7.4” x 2.8” (292 x 188 x 72 mm)
Power supply
External DC input: 15 to 19 VDC
External AC power adapter
100 to 250 VAC, 50 to 60 Hz; 1.25 to 0.56 A
15 VDC, 4 A
Power consumption
12 W
6 cell Lithium Ion, 10.8 V, 4.6 A-h
Battery operating time
4 hours
English, Chinese, French, Spanish, Japanese, Russian, German, Italian, and Turkish
Coniguration Information
N9912A FieldFox RF analyzer
FieldFox RF Analyzer base functions:
One port cable and antenna analyzer (4 GHz), broadband calibration, CalReady, standard
mechanical cal kit support. Measurements include: return loss, distance-to-fault (DTF),
one port cable loss and VSWR.
Standard accessories included N9912A:
AC/DC adapter; battery; soft carrying case comes with backpack and shoulder straps;
Quick Reference Guide; User’s Guide
N9912A FieldFox Options
Option 104
4 GHz cable and antenna analyzer
Option 106
6 GHz cable and antenna analyzer
Qption 110
Transmission measurement
Option 111
Option 230
4 GHz spectrum analyzer (requires Option 104)
Option 231
6 GHz spectrum analyzer (requires Option 106)
Option 235
Preampliier for spectrum analyzer (requires Option 230 or 231)
Option 236
Interference analyzer
Option 302
External USB power sensor support
Option 303
Network analysis capability
Option 308
Vector voltmeter
Option 010
Network analyzer time domain
Option 311
Channel power meter
Option 030
Remote control capability (from iOS device)
Option 330
Pulse measurements (requires USB peak power sensor)
N9912A upgrades
The following upgrades are available for the N9912A FieldFox RF Analyzer. More information regarding upgrades is available at:
Product number before upgrade
Required Options before upgrade
Add transmission measurement capability
Allows use of second port in NA and CAT
Add QuickCal
Add 4 GHz spectrum analyzer
4 GHz unit only, Option 104
Add 6 GHz spectrum analyzer
6 GHz unit only, Option 106
May only be installed on 4 GHz instrument.
May only be installed on 6 GHz instrument.
Add preampliier to spectrum analyzer
Spectrum analyzer Option, 230 or 231
Add interference analyzer
Spectrum analyzer Option, 230 or 231
Add external USB power sensor support
Add network analyzer capability; one port
For second port, add Option 110.
Vector voltmeter
Add network analyzer time domain
Network analyzer Option 303
Add channel power meter
Add remote control capability
Add pulse measurements (requires USB peak
power sensor)
Coniguration Information continued
N9910X RF/MW handheld analyzer accessories
T-calibration kit, DC to 6 GHz, Type-N (m)
T-calibration kit, DC to 6 GHz, Type-N (f)
T-calibration kit, DC to 6 GHz, 7/16 DIN (m)
T-calibration kit, DC to 6 GHz, 7/16 DIN (f)
4-in-1 OSLT mechanical calibration kit, DC to 9 GHz, Type-N (m), 50 ohm
4-in-1 OSLT mechanical calibration kit, DC to 9 GHz, Type-N (f), 50 ohm
Rugged phase-stable cable, Type-N (m) to Type-N (m), 5 ft
Rugged phase-stable cable, Type-N (m) to Type-N (f), 5 ft
Rugged phase-stable cable, Type-N (m) to Type-N (m), 12 ft
Rugged phase-stable cable, Type-N (m) to Type-N (f), 12 ft
Rugged phase-stable cable, Type-N (m) to 7/16 (m), 5 ft
Rugged phase-stable cable, Type-N (m) to 7/16 (m), 12 ft
Rugged phase-stable cable, Type-N (m) to Type-N (f), 3.28 ft
Rugged phase-stable cable, Type-N (m) to Type-N (m), 3.28 ft
Antenna, directional, multiband, 800 to 2500 MHz, 10 dBi
Antenna, telescopic whip, 70 MHz to 1 GHz
Coaxial adapter, Type-N (m) to 7/16 DIN (f)
Adapter kit: Type-N (f) to 7/16 DIN (f), Type-N (f) to 7/16 DIN (m), Type-N (f) to Type-N (f)
Coaxial adapter, Type-N (m) 50 ohm to Type-N (f) 75 ohm (Recommend quantity 2 for
75 ohm measurements)
Fixed attenuator, 40 dB, 100 W, DC to 3 GHz, Type-N (m) to Type-N (f)
Fixed attenuator, 40 dB, 50 W, DC to 8.5 GHz, Type-N (m) to Type-N (f)
Extra battery
External battery charger
AC/DC adapter
External bias-tee, 2.5 MHz to 6 GHz, 1 W, 0.5 A
DC car charger and adapter
Extra soft carrying case with backpack and shoulder strap
Hard transit case
For more information go to:
Coniguration Information continued
Antenna, N9910X-821
Directional antenna, N9910X-820
Bias-tees, N9910X-874
Phase stable cable, N9910X-810
100 Watt attenuator, N9910X-860
DC car charger and adapter,
Adapter kit, N9910X-845
T-Cal kits
Soft carrying case with backpack and shoulder straps
included with a standard N9912A. For an extra soft
carrying case order N9910X-880
Hard transit case, N9910X-881
AC/DC adapter,
FieldFox its inside hard transit case
External battery charger,
29 | Keysight | FieldFox N9912A 4/6 GHz RF Analyzer - Technical Overview
A personalized view into the information most relevant to you.
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of ownership. The only test and measurement company with three-year
warranty standard on all instruments, worldwide.
Keysight Assurance Plans
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instruments are operating to specification so you can rely on accurate
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DEKRA Certified ISO 9001:2008
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For more information on Keysight
Technologies’ products, applications or
services, please contact your local Keysight
office. The complete list is available at:
United States
(877) 894 4414
55 11 3351 7010
001 800 254 2440
(800) 829 4444
Asia Paciic
Hong Kong
Other AP Countries
1 800 629 485
800 810 0189
800 938 693
1 800 112 929
0120 (421) 345
080 769 0800
1 800 888 848
1 800 375 8100
0800 047 866
(65) 6375 8100
Europe & Middle East
United Kingdom
0800 001122
0800 58580
0800 523252
0805 980333
0800 6270999
1800 832700
1 809 343051
800 599100
+32 800 58580
0800 0233200
8800 5009286
0800 000154
0200 882255
0800 805353
Opt. 1 (DE)
Opt. 2 (FR)
Opt. 3 (IT)
0800 0260637
For other unlisted countries:
This information is subject to change without notice.
© Keysight Technologies, 2008 - 2014
Published in USA, July 31, 2014
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