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Chapter 21, Spectrum Analyzer Screen
Field Descriptions
Spectrum Analyzer Auxiliary Menu Fields
Figure 132 Spectrum Analyzer Auxiliary Functions
Input Atten
Input attenuation sets the amount of input attenuation for the RF IN/OUT and
ANT IN ports. This field performs two functions:
• The upper field determines if the instrument sets the attenuation (Auto), or if you want
to set the value (Hold).
• The lower field displays the present attenuation value and is used to set the desired at-
tenuation level when the upper area is set to Hold.
Operating Considerations
Maximum signal levels at each port are printed on the front panel.
Setting the upper field to
Hold prevents the RF autoranging process from
interrupting Spectrum Analyzer operation when a signal is first measured. This
can be helpful when you need to see the signal the instant the source is input, but
requires you to set the needed amount of input attenuation.
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