Tips for preventing damage to the spectrum analyzer

Ensure proper grounding

1. Always use the three-phase AC power cord that comes with the analyzer.

2. Ground the instrument correctly to prevent static charge accumulation. The accumulation of a large amount of static charge may cause damage to the instrument and personal injury to the operator.

3. Do not use extension cables, power cables or autotransformers without unprotected grounding conductors to avoid damage to grounding protection.

4. Check the quality and polarity of the AC power supply; typically the required AC voltage is 100 V, 120 V, 220 V ±10% or 240 V + 5%/-10%. The expected ground wire resistance is < 1 Ω, the voltage between the neutral and ground lines is <1V, and an uninterruptible power supply [UPS] is installed if necessary.

Read warning labels and technical indicators

1. Do not exceed the value of the parameter provided in the Technical Indicators Guide or the value indicated on the yellow warning label on the Analyzer.

2. Please refer to the Technical Indicators Guide for the conditions required to achieve the listed technical indicators. Please note the information on settling time, instrument settings and calibration requirements.

3. For example, the yellow warning label on the front panel of the E4440A PSA indicates that the maximum RF input power is 30 dBm (1W) and 0 Vdc DC-coupled voltage.

Avoid inputting excessive power to the analyzer

1. Limit the signal level that will be measured using the spectrum analyzer to avoid front-end damage. Applying excessive power to the front end can cause damage to the front end components. The typical maximum RF input signal level is 30dBm (1W).

2. Turn off the DUT/source or reduce the power of the DUT/source before turning on or off the connected device or device under test. This helps prevent accidental voltage rises or falls and avoids affecting the analyzer's input or output. Use DC blockers, limiters or external attenuators as needed.