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Keysight N9000B/503 CXA Signal Analyzer, 3 GHz
The N9000B CXA Signal Analyzer is the entry-level member of the renowned X-Series family, delivering reliable and cost-effective signal characterization for industrial communications, RF design, and IoT applications. Designed for versatility, it supports a wide range of tasks—from engineering and manufacturing to education and repair services.
Built on Keysight’s proven measurement science, the CXA offers a solid foundation for general-purpose spectrum and signal analysis. Its flexible architecture allows users to scale capabilities as needed, protecting your investment while adapting to evolving test requirements. Whether you're analyzing analog or digital signals, measuring noise figure, or performing EMI emissions testing, the CXA can be upgraded with powerful X-Series applications via simple license-key upgrades.
Key Features and Specifications
9 kHz to 3.0 GHz frequency range (503 configuration)
10 MHz analysis bandwidth
Dual core 64-bit performance processor, 8 GB RAM, solid-state drive
±0.5 dB absolute amplitude accuracy
Enhanced phase noise
Up to +17 dBm third order intercept (TOI)
DANL @2 GHz, No Preamplifier -147 dBc/Hz
-163 dBm at 1 GHz, -147 dBm at 26.5 GHz displayed average noise level (DANL) with preamplifier
Wideband IF output, USB 3.0, 100Base-T LAN, GPIB
Programming language compatibility with ESA and other X-Series
Basic EMI pre-compliance measurement capability available
Standards-based PowerSuite
Supports BenchVue software (BV90001B)
Three-year warranty


Make Fast and Accurate Power Measurements
Wireless systems rely on accurate power readings of digitally modulated signals to function at peak capacity and deliver clear communication. The N9000B CXA and PowerSuite, standard in the X-Series, complete nine measurements swiftly.
PowerSuite includes:
Channel Power
Adjacent Channel Power (ACP)
Occupied Bandwidth (OBW)
Complementary Cumulative Distribution Function (CCDF)
Burst Power
Spurious Emissions
Spectrum Emission Mask (SEM)
Third Order Intercept (TOI)
Harmonic Distortion
Deliver Better Results with a Common Multi-touch Interface
With the N9000B CXA you can perform most operations in two steps or less using the streamlined, 10.6-inch multi-touch user interface. To ensure measurement integrity and repeatable results, the same proven algorithms are used in every X-Series signal analyzer.
Common Measurements Available From a CXA
If you're developing wireless, IoT, or medical devices, it's essential to test them against relevant wireless standards to ensure compliance with required specs.
The N9000B CXA serves as a general-purpose spectrum analyzer that enables you to evaluate key transmitter parameters. It helps verify aspects such as center frequency accuracy and drift, output power levels, occupied bandwidth, and the presence of in-band or out-of-band spurious emissions.
By integrating X-Series measurement applications, the CXA transforms into a powerful signal analyzer capable of characterizing modern narrowband wireless formats, such as LoRa, Bluetooth, Zigbee, NB-IoT, and various WLAN standards (802.11 a/b/g/j/p/n/af/ah), and more custom digital modulation signals.

Front Panel Tour
Fast select and set for desired measurements and modes
Tap to add more measurement windows
Functions to tune for the best view of spectrum (marker, peak search, resolution bandwidth/video bandwidth, trace)
Factory preset or User preset sets instrument parameters back
to a known desired statusSaves measurement screens into an external USB memory
Reinitiate a measurement without changing any parameters
Turn on/off for the control from the multi-touch display
Built-in Help document
Tap to access to file system and on-line Help
Measurement parameters, tap to edit

Rear Panel Tour
EXT REF IN
GPIB
USB 3.0 Type A
DisplayPort
USB 3.0 Type B
Thunderbolt 3
1G LAN
10G LAN
Removable Disk Drive
Line power input
Analog Out
TRIGGER 1 OUT
Sync
TRIGGER 1 IN
Noise Source Drive
+28 V (Pulsed)SNS Series Noise Source
10 MHz OUT

Design, Test and Deliver your Next Breakthrough with the X-Series
Engineering is all about connecting ideas and solving problems. This experience drives the X-Series signal analyzers: they are the benchmark for accessible performance that puts you closer to the answer by easily linking cause and effect. Across the full spectrum, from CXA to UXA, you’ll find the tools you need to design, test and deliver your next breakthrough. Reach for the X-Series and make an inspired connection.
Feature | N9040B/41B UXA | N9030B PXA | N9020B/21B MXA | N9010B EXA | N9000B CXA |
---|---|---|---|---|---|
Maximum Frequency | 110 GHz | 50 GHz | 50 GHz | 44 GHz | 26.5 GHz |
Maximum Internal Analysis Bandwidth | 1 GHz | 510 MHz | N9020B: 160 MHz N9021B: 510 MHz | 40 MHz | 25 MHz |
PowerSuite | Standard | Standard | Standard | Standard | Standard |
2 dB Step Attenuator | Standard | Standard | Standard | Optional | Optional |
Precision Frequency Reference | Standard | Standard | Optional | Optional | Optional |
Noise Floor Extension | Standard | Standard | Optional | Optional | N/A |
Fast Sweep | Standard | Standard | Optional | Optional | N/A |
External Mixing | Standard | Optional | Optional | Optional | N/A |
Microwave Preselector Bypass | Standard | Optional | Optional | Optional | N/A |
Fast Power | Optional | Optional | Optional | Optional | N/A |
Real-time Spectrum Analysis | Optional | Optional | Optional | N/A | N/A |
Low Noise Path | Standard | Optional | N/A | N/A | N/A |
Full Bypass Path | Optional | Optional | N/A | N/A | N/A |
BBIQ | N/A | Optional | Optional (N9020B only) | N/A | N/A |
Tracking Generator | N/A | N/A | N/A | N/A | Optional |
See and Understand More with Applications
The X-Series applications are proven, ready-to-use measurements for signal analysis. Capturing measurement expertise and delivering repeatable results, the applications let you see and understand the performance of your devices and designs:
Utilize applications that range from parametric to
standards-compliant wireless measurementsPhase noise, noise figure, pulse analysis, analog demodulation
LTE/LTE-Advanced, W-CDMA, and more
Get essential measurements and troubleshooting views that simplify
complex operationsBelieve cross-platform results from applications
that use the same algorithms in every X-Series modelShare your library of applications across several
N9000B CXA analyzers with transportable licenses

What's in the Box
N9000B/503 CXA Spectrum analyzer
2 side carrying straps,4 rear feet, 4 bottom feet with a tilt stand
User’s guide (embedded in the help system)
Power cord (dependent upon region of use)