User`s guide

Key Reference 5
N9340A User’s Guide 109
•Pos Peak
Obtains the maximum video signal between the last
display point and the present display point. This
value is stored in memory. It is used primarily
when measuring sinusoidal (spectral) components.
When Positive Peak is selected, “P” appears in the
upper- left corner.
Key access: [TRACE] > {More (1 of 2)} > {Pos Peak}
• Sample
Primarily used to display noise (or noise- like)
signals. It should not be used to measure the
accurate amplitude of
non- noise- like signals.
In sample mode, the instantaneous signal value at
the present display point is placed in memory.
When in Sample detector mode, an “S” appears in
the upper- left corner of the display.
Key access: [TRACE] > {More (1 of 2)} > {Detector} >
{Sample}
•Neg Peak
Similar to peak detector, but selects the minimum
video signal value. Not to be used to measure the
most accurate amplitude. When in Negative Peak
mode, an “N” also appears in the upper-left corner.
Key access: [TRACE] > {More (1 of 2)} > {Detector} >
{Neg Peak}
Average
Initiates a digital averaging routine that averages
the sweep trace points resulting in trace
“smoothing”. Increasing the average number will
further smooth the trace. For the information of
the type of averaging please refer to “Avg Type" on
page 90.