ISO/IEC 17025 Accredited · Trusted by Engineers Worldwide · Serving 11 Industries
+1 530-268-1860 contact@microprecision.com
ISO/IEC 17025 Accredited · Trusted by Engineers Worldwide · Serving 11 Industries
+1 530-268-1860 contact@microprecision.com
Browse 18 used spectrum analyzers and signal analyzers from Keysight, Anritsu, and Rohde & Schwarz. CXA, EXA, MXA, PXA, and UXA series signal analyzers covering 3 Hz to 44 GHz — built for spectrum analysis, EMI pre-compliance testing, and modulation characterization. All units tested and verified. ISO/IEC 17025 accredited calibration available.
Image | Name | Price |
|---|---|---|
 | Anritsu MP1570A communication analyzer with modular design, BER, jitter, and signal quality testing — ideal for telecom transmission systems. | $795.00 |
 | The Anritsu MS2725C Spectrum Master is a compact, high-performance analyzer designed for field use up to 32 GHz. Ideal for telecom, aerospace, and defense, it features advanced tools like peak… | $14,995.00 |
 | IFR A-8000 Spectrum Analyzer covers 10 kHz to 2.6 GHz, offering fast sweeps, high resolution, and advanced measurement functions for precise signal analysis. | $2,495.00 |
 | Keysight 8592A Portable Spectrum Analyzer, 50kHz–22GHz, high accuracy, lightweight, ideal for telecom, aerospace, and field testing. | $1,495.00 |
 | Keysight E4443A Spectrum Analyzer, 3 Hz to 6.7 GHz, -148 dBm DANL. High precision, fast sweep time, ideal for wireless, aerospace, and defense. | $9,995.00 |
 | Keysight N8973A Noise Figure Analyzer, 10 MHz to 3 GHz, with 0 to 30 dB noise figure range, built-in noise source, and automatic calibration. | $4,495.00 |
 | Keysight N9000B CXA signal analyzer, 9 kHz–3 GHz range, multi-touch, low noise, high accuracy, ideal for telecom and aerospace testing. | $15,995.00 |
 | Keysight N9010A EXA signal analyzer, 10 Hz–3.6 GHz, high dynamic range, fast sweep, modulation analysis for telecom and aerospace.
| $7,995.00 |
 | Keysight N9010B Signal Analyzer, 10 Hz to 26.5 GHz, 160 MHz bandwidth, real-time spectrum analysis, and phase noise measurement. | $51,250.00 |
 | Keysight N9020A Signal Analyzer, 10 Hz to 3.6 GHz, real-time spectrum, modulation analysis, and high dynamic range for precise signal testing. | $7,595.00 |
Buying Guide
Frequency range, key specs, and analyzer types — what matters before you buy.
A traditional spectrum analyzer measures signal power versus frequency — ideal for identifying spurious signals, harmonics, and occupied bandwidth. A signal analyzer (CXA, EXA, MXA, PXA, UXA) adds vector signal analysis: it demodulates digitally modulated signals, measures EVM, and supports 5G NR, LTE, Wi-Fi, and other wireless standards. If your work involves digital modulation characterization, a signal analyzer is the right choice over a basic spectrum analyzer.
Low-frequency applications (audio, power electronics) need coverage from a few Hz or kHz. Most RF lab work requires coverage to at least 3 GHz for sub-6 GHz wireless. Microwave applications including 5G mmWave, satellite, and defense radar demand analyzers covering 26.5 GHz to 44 GHz. Always choose an analyzer with a frequency range that extends beyond your highest signal of interest to maintain calibrated accuracy at the band edge.
Phase noise determines the analyzer's ability to resolve closely-spaced signals — critical for oscillator characterization and adjacent channel measurements. DANL (Displayed Average Noise Level) defines the minimum detectable signal power: lower DANL means weaker signals can be measured. Resolution bandwidth (RBW) sets frequency selectivity — narrower RBW separates adjacent signals more clearly at the cost of slower sweep speed. For EMI pre-compliance testing, low DANL and narrow RBW are both essential.
Keysight's X-Series spans from entry-level to flagship: the CXA (N9000B) is a cost-effective essential-class analyzer. The EXA (N9010A/B) adds more measurement options. The MXA (N9020A/B) delivers mid-range performance with wide analysis bandwidth. The PXA (N9030A) targets high-performance characterization. The UXA (N9040B) is the top-tier platform with the lowest phase noise and DANL for demanding defense and 5G applications. All share a common interface and software compatibility.
All Micro Precision spectrum analyzers are sold tested and verified operational before shipment. ISO/IEC 17025 accredited calibration is available from our A2LA-recognized laboratory, providing documented measurement traceability for aerospace, defense, telecommunications, and production test programs. Each instrument is verified against key performance specifications — including DANL, phase noise, and frequency accuracy — before leaving our facility, with calibration certificates meeting MIL-STD-45662 and ISO 9001 quality requirements.
FAQ
A spectrum analyzer measures the power of signals across a frequency range, displaying power (dBm) versus frequency on screen. It is used to identify spurious emissions, harmonics, and interference, characterize transmitter output, measure occupied bandwidth, and perform EMI pre-compliance testing. In RF and microwave labs, spectrum analyzers are one of the most fundamental pieces of test equipment for troubleshooting and verifying wireless devices and systems.
A spectrum analyzer measures power versus frequency in a swept or real-time mode. A signal analyzer adds vector signal analysis capability — it can demodulate AM, FM, and digitally modulated signals (QAM, OFDM, 5G NR, LTE, Wi-Fi) and measure parameters like EVM and adjacent channel power ratio (ACPR). Keysight's X-Series instruments (CXA, EXA, MXA, PXA, UXA) are all signal analyzers. For modern wireless work, a signal analyzer is generally the better investment over a traditional swept spectrum analyzer.
DANL stands for Displayed Average Noise Level — the minimum signal power level the analyzer can detect, expressed in dBm/Hz. It represents the analyzer's own internal noise floor. A lower DANL (more negative dBm value) means the analyzer can measure weaker signals. For example, a DANL of –155 dBm/Hz is significantly more sensitive than –145 dBm/Hz. DANL is a key spec when measuring low-level signals, emissions from low-power devices, or during receiver sensitivity testing.
Resolution bandwidth (RBW) is the minimum frequency separation at which two signals can be individually resolved on the display. A narrow RBW (1 Hz or 10 Hz) separates closely-spaced signals clearly but requires a slower sweep. A wider RBW (1 MHz) sweeps faster but cannot resolve signals close in frequency. For EMI pre-compliance testing, standards specify particular RBW settings — typically 9 kHz, 120 kHz, or 1 MHz depending on frequency range — to ensure consistent, repeatable measurements.
Yes. Micro Precision Test Equipment offers ISO/IEC 17025 accredited calibration for spectrum analyzers and signal analyzers. Our A2LA-recognized laboratory verifies key performance specifications including DANL, frequency accuracy, and phase noise, issuing calibration certificates that meet traceability requirements for aerospace, defense, and production test programs. Calibration is available at checkout or by request for any unit in our inventory.