Display Line; Noise Marker - Agilent Technologies FieldFox N9913A User Manual

Display Line

A display line is a simple, horizontal line that can be placed at any amplitude
level on the SA screen. Use a display line as mental guide for visual feedback. A
display line is similar to a Limit Line, except that no PASS/FAIL testing occurs.
A display line is easier to create than a Limit Line. Learn about Limit Lines on
page 158.
How to create and move a Display Line
 Press Limit __8
 Then
 Then enter a Y-axis value using the ▲|▼ arrows or the rotary knob, then press

Noise Marker

For comparison purposes, electronic noise measurements are often displayed as
though the measurement was made in a 1 Hz Res BW. However, making an actual
measurement at a 1 Hz Res BW is impossible, and at 10 Hz, extremely slow.
A Noise Marker, unique to SA Mode, mathematically calculates the noise
measurement as though it were made using a 1 Hz bandwidth.
SA (Spectrum Analyzer) Mode
Negative Peak [NPk] Displays the minimum value of all the measurements
o
in each bucket.
Sample [Smp] Displays the center measurement of all the measurements in
o
each bucket. This setting gives a good representation of the random noise in
each bucket. However, it does not ensure that all signals are represented.
Average [#RMS] Displays the Root Mean Squared (RMS) average power of
o
all the measurements in each bucket. This is the preferred method when
making power measurements. Learn more on page 157.
Display Line OFF ON
Enter. Or enter a value using the numeric keypad and press a suffix key or
press Enter.
Display line with annotation
103