Agilent Technologies HP8648A Uživatelský manuál stáhnout pdf (Strana 196)

Using the Spectrum Analyzer

195

Measurements Using the Auxiliary Control Fields:

•From Controls select Off to update the display after each sweep, or Pk

Hold to retain the highest input value for each point in successive sweeps.

• Input Atten sets the input attenuator to Automatic or Hold. If Hold is

selected, a specific level can also be selected.

•From Sensitivity select Normal for normal input sensitivity, or High for

increased input sensitivity (<1 µV) to locate low level signals. Sensitivity

also is used to set the vertical scale (dB/Div).

NOTE: Using High Sensitivity may cause erroneous amplitude or AM side-band

amplitude measurements.

•From Normalize

− select Save B to save the current trace (can only be performed when

A Only is selected).

− select to display a continuously updated screen (normal operation).

− select to display the difference between the trace saved (using Save

B) and the current trace.

Marker Indicators:

•Marker Freq MHz changes the units that the marker frequency is

displayed in.

•Marker Lvl dBm changes the units that the marker amplitude is

displayed in.

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Agilent Technologies HP8648A Uživatelský manuál Strana 196