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Chapter 6 215
Analog Measurements - Screens and Control Fields
Control Fields for Analog Measurements
Sensitivity (spectrum analyzer)
This area performs two functions:
• The lower field selects the vertical resolution of the display. You can
choose from 1 dB, 2 dB, or 10 dB per graticule.
• The upper field selects Normal or High sensitivity for the RF input.
The High setting adds about 6 dB of sensitivity to the ANT IN port
(when the Input Atten field is set to 0 dB) for looking at very low
level signals. However, this setting can cause measurements to be
uncalibrated (indicated by a message on the screen). High sensitivity
can also cause high-level AM signals to be distorted.
Screens on which this field is displayed
SPEC ANL: auxiliary controls menu
Settling
This field selects the settling time for making AF measurements. Lower
frequency signals require additional settling time (Slow). Higher
frequency measurements require less settling time (Fast).
Operating Considerations
Use Slow for ≤200 Hz signals. Use Fast for >200 Hz signals.
If the signal being measured is a composite of different frequencies
above and below 200 Hz, select the appropriate filtering to analyze the
desired signal component.
Screens on which this field is displayed
AF ANALZYER