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Measurement Services

Spectrum Analyzer Calibration

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Spectrum analyzer calibration is the process of verifying and adjusting the accuracy of the unit’s measurements. Calibration ensures the device provides precise frequency and amplitude readings, which is critical in applications like telecommunications, electronics testing, and RF (radio frequency) analysis.

Importance of Spectrum Analyzer Calibration

  • Measurement Accuracy: Spectrum analyzers that are not calibrated can provide inaccurate results, leading to faulty designs or failed compliance tests.
  • Compliance with Standards: Calibration ensures that the device meets industry standards, such as ISO/IEC 17025.
  • Device Longevity: Regular calibration prevents performance degradation over time and maintains the analyzer’s reliability.

Steps Involved in Spectrum Analyzer Calibration

Initial Setup

  • Ensure the analyzer is operating under stable conditions (temperature, environment).
  • Connect calibration equipment like a signal generator, power meter, or standard signal source.

Frequency Accuracy

  • Use a reference signal of a known frequency from a signal generator.
  • Adjust the analyzer’s internal clock or local oscillator to minimize the frequency error.

Amplitude Accuracy

  • Connect a signal of known amplitude to verify the analyzer’s power reading.
  • Adjust the analyzer’s gain and attenuation settings to match the expected value.

Resolution Bandwidth (RBW) and Filter Accuracy

  • Check that the resolution bandwidth filters function as expected by measuring a signal with a known bandwidth.
  • Calibrate filter responses to ensure accurate spectral representation.

Noise Floor and Sensitivity

  • Measure and minimize the internal noise level of the analyzer.
  • Ensure that the device can detect low-level signals within its specifications.

Linearity Calibration

  • Test the analyzer’s response to a range of input levels to ensure that the amplitude response is linear across the dynamic range.

Calibration can be performed by McHale’s certified laboratory and we recommend periodical service based on usage and environmental conditions. Contact us today and we will take care of all your spectrum analyzer needs.