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 |
|---|---|---|
 | Keysight N9020A MXA signal analyzer, 10 Hz–13.6 GHz, wide dynamic range, fast measurement, low phase noise for telecom and aerospace. | $18,265.00 |
 | Keysight N9020B MXA Signal Analyzer offers precision measurement with 10 Hz to 26.5 GHz range, advanced analysis features, and high dynamic range. | $39,995.00 |
| | Keysight N9020B MXA Signal Analyzer 508, 10 Hz–3.6 GHz, high dynamic range, low phase noise, fast sweep, ideal for wireless and defense. | $28,350.00 |
| | Keysight N9020B Signal Analyzer, 10 Hz to 8.4 GHz, advanced technology, dynamic range, low phase noise, and fast sweep speeds for precise testing. | $29,995.00 |
 | Keysight N9030A Signal Analyzer offers 10 Hz to 3.6 GHz frequency range, high dynamic range, phase noise accuracy, and wideband signal analysis. | $25,995.00 |
| | The Keysight N9030A PXA Signal Analyzer offers a frequency range of 10 Hz to 3.6 GHz, with high dynamic range, phase noise accuracy, and advanced signal analysis features. | $47,995.00 |
 | The Keysight N9040B Signal Analyzer provides precise signal analysis with a frequency range of 10 Hz to 26.5 GHz, real-time analysis, and advanced measurement features. | $49,995.00 |
 | Rohde & Schwarz FSV40-N Spectrum Analyzer offers 9 kHz to 40 GHz range, excellent sensitivity, and high dynamic range for precise RF analysis. | $28,595.00 |
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.