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3 Spectrum Analyzer Mode

3.10 TOI Measurement

When in Clear/Write, if a measurement-related instrument setting is changed when

the instrument is sweeping, a new sweep is initiated but the trace is not cleared.

While the sweep always uses the peak detector, in zero-span measurement the

average detector is used, and the metrics are calculated using the average of the

zero-span data.

Max Hold

The instrument maintains and displays a max hold trace, which represents the

maximum data value on a point-by-point basis of the new trace data and previous

trace data. Details of the count limiting behavior may be found under "Avg/Hold

Num" on page 1828 in Meas Setup.

Pressing Max Hold, or sending :TRAC:TYPE MAXH, sets the trace type to Max Hold,

causes the trace to be cleared, and causes the Max Hold sequence to be (re)started,

even if you are already in Max Hold. The max hold trace uses peak detection; in

zero-span measurement the metrics are calculated using the peak value of the

zero-span data.

Restarting the Max Hold sequence means:

–

The average/hold count k is set to 1, so that the next time the max hold trace is

displayed it simply represents one trace of new data

–

A new sweep is initiated

Clear and Write | Restart Averaging | Restart Max/Min Hold

Starts the trace writing, as though the "Trace Type" on page 1927 had just been

selected. The effect is exactly the same as reselecting the current Trace Type again

– the control is provided because it may not be obvious that reselecting the same

selection from a radio button menu will take any action.

This control displays different labels, depending on the selected Trace Type:

–

Clear/Write: Clear and Write

–

Trace Average: Restart Averaging

–

Max Hold: Restart Max Hold

–

Min Hold: Restart Min Hold

Spectrum Analyzer Mode User's &Programmer's Reference 1847

Keysight x-series User Manual

Other manuals for Keysight x-series