Agilent Technologies ESA Series User's/Programmer's Reference page 68

Front-Panel Key Reference
Det/Demod
Sample
Negative Peak
Selects and configures the specified type of EMI detection. Selecting
EMI Detector
either quasi-peak or EMI average runs an amplitude ranging process
that affects the reference level and attenuation settings. This optimizes
the available dynamic range for the measurement. It also gives you
access to the View and QP/Avg Gain functions.
Key Access:
The
NOTE
installed.
Quasi Peak
EMI Average
68
stores this value in memory. Peak detection is selected
at power on and by pressing
set to
Factory
detection is selected, Peak appears in the upper-left
corner of the display.
Key Access:
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
appears in the upper-left corner of the display.
Key Access:
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
corner of the screen.
Key Access:
Det/Demod
menu key only appears when the Option AYQ is
EMI Detector
The quasi-peak EMI detector weights the peak detected
amplitude using specific charge, discharge, and meter
time constants. The effect of this detector depends on
the characteristics and repetition rate of the input
signal. When the quasi-peak detector is selected, the
analyzer is forced to linear amplitude display using
sample detection.
Key Access:
The EMI average detector averages the peak detected
amplitude. When EMI average detection is selected, the
analyzer is forced to linear amplitude display using
Preset
and is set to
Power On
Det/Demod, Detector Auto Man
detection is selected, Samp
Sample
Det/Demod, Detector Auto Man
is selected, NPk appears in the upper-left
Det/Demod, Detector Auto Man
Det/Demod, EMI Detector
when is
Preset Type
. When
Preset Peak
Chapter 2