q
VBW Manual — Sets the video bandwidth manually, independent of the
RBW.
q
Back — Returns to the previous menu level.
q
Trace — Activates a menu of trace related functions. Use the corresponding
soft key to select the desired trace function.
q
Max Hold — Displays and holds the maximum responses of the input sig
-
nal.
q
Average (2-25) — Sets the number of the sweeps to be averaged. The
number of the sweeps can be adjusted from 2 to 25 using the Up/Down
arrow key, or entered directly with the keypad number keys. Select
OFF,
or enter 1 to turn off averaging. Press ENTER to accept the selected
value.
This feature uses a measurement routine that averages samples over a
user-defined number of successive sweeps. The averaging is done on a
point-by-point basis. Each displayed point reflects the current measure
-
ment associated with that point averaged with the measurements associ
-
ated with that point from previous sweeps. This feature can be used to
minimize the impact of transients on the displayed signal and noise.
q
Min Hold — Displays and holds the minimum responses of the input sig
-
nal over multiple sweeps. This feature is useful for detecting small, dis-
crete, stable signals in the presence of noise.
q
Trace Math — Pressing the Trace Math key in Transmission Measure-
ment mode activates a menu of trace-related functions. Use the corre-
sponding softkey to select the desired trace function.
NOTE: For this function, Trace A is always the runtime trace, and Trace B is al-
ways a saved trace. With the standard monochrome display, Trace A is dis-
played as a black trace and Trace B is displayed as a gray trace. With the
Option 3 color display, Trace A is displayed as a yellow trace, and Trace B is
displayed as a magenta trace. Some adjustment of the display contrast (see
page 2-7) may be required for optimal viewing. Refer to page 3-14 for informa
-
tion on saving and recalling traces.
q
Recall Trace ® B — Recalls a stored trace into the Trace B buffer.
q
View B /Clear B — Overlays a stored trace over the current trace. If
there is no trace in the Trace B buffer, the Recall Trace list will dis
-
play. Select a trace from the menu of saved traces to recall to the
Trace B buffer. Pressing the soft key again turns off the trace overlay.
q
A ® B — Moves the currently displayed trace into the Trace B
buffer.
q
A-B ® A — Subtracts Trace B from Trace A and displays the result
as Trace A.
q
A+B ® A — Adds Trace B to Trace A and displays the result as
Trace A.
q
Calibrate TM — Calibrates the Spectrum Master for transmission measure
-
ments.
2-40
Chapter 2 Functions and Operations
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