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• 1. How the Pre-Scan measurement is performed in detail
• 2. How the Scan measurement is performed in detail
• 3. How the Multi-Scan measurement is performed in detail
• 4. How the Immunity-Scan measurement is performed in detail

1. How the Pre-Scan measurement is performed in detail

• The Scanner moves to the first measuring position.
• The spectrum analyzer is reset
• Basic settings are transferred to the spectrum analyzer
• The spectrum analyzer is set to max hold mode.
  (Max hold means that the highest amplitude at each frequency is kept.)
• The spectrum analyzer takes a number of sweeps.
• The Scanner moves to the next measuring position.
• Steps 5 to 6 are repeated until all measuring positions are measured.
• The frequency and amplitude of all peaks are acquired.
  (The spectrum analyzer decides what is a peak and what is not.)
• The trace is acquired.
• The Scanner moves to its starting position.

2. How the Scan measurement is performed in detail

• The spectrum analyzer is reset.
• The Scanner moves to the first measuring position.
• Basic settings are transferred to the spectrum analyzer.
• The spectrum analyzer zooms in on the first selected frequency.
• The spectrum analyzer is set to max hold mode.
  (Max hold means that the highest amplitude at each frequency is kept.)
• The spectrum analyzer takes a number of sweeps.
• The frequency and amplitude of the highest peak is acquired.
• Max hold mode is cleared.
• The spectrum analyzer zooms in on the next selected frequency.
• Steps 5 to 9 are repeated until all frequencies are measured.
• The Scanner moves to the next measuring position.
• Steps 5 to 11 are repeated until all measuring positions and frequencies are measured.
• The Scanner moves to its starting position.

3. How the Multi-Scan measurement is performed in detail

Basically, a Multi-Scan measurement is a series of Pre-Scan measurements, one in every measuring position.

From these Pre-Scan measurements field plots similar to Scan measurements, are generated. So when viewing the result from a Multi-Scan measurement any frequency can be chosen to look at in detail.

• The spectrum analyzer is reset
• The Scanner moves to the first measuring position.
• Basic settings are transferred to the spectrum analyzer
• The spectrum analyzer is set to max hold mode.
  (Max hold means that the highest amplitude at each frequency is kept.)
• The spectrum analyzer takes a number of sweeps.
• The trace data is transferred to the software.
• Max hold mode is cleared.
• The Scanner moves to the next measuring position.
• Steps 4 to 8 are repeated until all measuring positions are measured.
• The Scanner moves to its starting position.

4. How the Immunity-Scan measurement is performed in detail

An Immunity-Scan is, very much lika a Multi-Scan measurement, only we measure immunity and not emission.

• The signal generator (SG) and the Error Detection Device (EDD) is reset
• Basic settings are transferred to the SG and the EDD
• The Scanner moves to the first measuring position.
• The lowest frequency and amplitude is sent to the SG.
• Wait for a while (dwell time) to let the DUT react.
• Measure DUT failure using the EDD and the Detection sequence.
• If the DUT does not fail we increase the amplitude and measure again for DUT failure until the DUT fails or we reach the highest amplitude setting.
• Store frequency and amplitude data.
• Set the next frequency and redo from (5) until we have measured all frequencies.
• The Scanner moves to the next measuring position.
• Steps 4 to 10 are repeated until all measuring positions are measured.
• The Scanner moves to its starting position.