GW Instek GSP-930 User Manual - Manual (Page 76)

GSP-930 User Manual
74
Trace Math
Description Performs trace math from two traces (TR1, TR2)
and stores the result in the currently selected
trace. It also performs trace shift.
Math functions Power Diff Subtracts the TR1 amplitude
data from the TR2 amplitude
data. The TR1 data TR2 data
are converted to watts. The
result is converted back to
dBm.
Log Diff Subtracts the TR1 amplitude
data from the TR2 amplitude
data and then adds a
logarithmic reference. Both the
TR1 and TR2 data is in dBm.
The resultant trace of the
subtraction is in dB. When the
result is added to a logarithmic
reference the resulting data is
in dBm.
LOG Offset Adds a reference to the TR1
trance
Operation 1. Press
Trace
> More[F1]>Trace Math[F1].
2. Press TR1[F1] and select the first trace source:
TR1: Trace 2, Trace 3, Trace 4
3. Press TR2[F2] and select the second trace
source:
TR2: Trace 2, Trace 3, Trace 4