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Key Function Descriptions
Key Descriptions
Detector
Typical Measurement
Mode
Positive
Good for making sure you do not miss any fast signal
Peak
peaks. Good for seeing signals that are very close to the
noise floor. Shows a noise floor that is slightly higher than
the actual noise floor.
Negative
Mostly used for troubleshooting the spectrum analyzer
Peak
and not for making measurements. Gives a good
representation of the modulation envelope for an AM
modulated signal.
Normal
Used for most normal operation. Good for viewing signals
and the noise floor at the same time. Does not miss any
signal peaks. May display signal peaks with a slight shift
in frequency. (Delayed by one display sample interval,
1/600 of the span.)
Sample
Good for making noise measurements. It's a more realistic
representation of noise than normal detection.
DETECTOR
Selects the negative-peak detector mode. Used to detect
NEG PEAK
the negative-peak noise level of a trace.
Front-panel key access:
DETECTOR
Sets the detector to normal mode; this is also the
NORMAL
default mode. In normal mode, the display simulates an
analog display by alternately displaying positive and
negative peaks when the presence of noise is detected,
and displaying positive peaks otherwise.
Front-panel key access:
232
TRACE
TRACE
Chapter 4
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