80 Chapter 2
Front-Panel Key Reference
Det/Demod
Sample Sample detection is used primarily to display noise or
noise-like signals. This detection should not be used to
make the most accurate amplitude measurement of non
noise-like signals. In sample mode, the instantaneous
signal value at the present display point is placed in
memory. When
Sample detection is selected, Samp
appears in the upper-left corner of the display.
Key Access:
Det/Demod, Detector Auto Man
Negative Peak
Negative peak detection functions the same as peak
detection, but selects the minimum video signal value.
This detection should not be used to make the most
accurate amplitude measurements of signals. When
Negative Peak is selected, NPk appears in the upper-left
corner of the screen.
Key Access:
Det/Demod, Detector Auto Man
EMI Detector
Accesses the Detector menu keys which allow you to select Quasi-Peak
or EMI Average detection. It also allows you to restore settings for
reference level and scale type after a Quasi-Peak or EMI Average
measurement. The
QP/Avg xGain and View keys are active when either
Quasi Peak or EMI Average is selected.
Key Access:
Det/Demod
Quasi Peak Enables quasi-peak detection which weights the
peak-detected amplitude using specific charge,
discharge, and meter time constants as described in
CISPR Publication 16. The effect of this detector
depends on the characteristics and repetition rate of
the input signal.
When the detector is selected, the analyzer is placed in
linear amplitude detection mode and the appropriate
detector is turned on. The system settings are
optimized to accurately measure the amplitude.
When quasi-peak is selected, QPeak appears in the
upper-left corner of the screen and quasi-peak is turned
on in the EMI Detector menu.
Key Access:
Det/Demod, EMI Detector
EMI Average
Turns EMI average detector On or Off. When the
detector is selected, the analyzer is placed in linear
amplitude detection mode and the appropriate detector
is turned on. The system settings are optimized to
accurately measure the amplitude.
Key Access:
Det/Demod, EMI Detector
Off
Turns EMI detectors On or Off.
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