Tektronix RSA5100A Series, Quick Start User Manual

Page: 77 / 84

Operation
6. Edit the contents of the table to match
the loss characteristics of the equipment
you are correcting for. Click
OK when
you are fi nished.
NOTE. You can enter either positive or
negative values into the table. But in contrast
to the External Gain value setting, positive
values represent a loss and negative values
represent a gain.
For detailed information on using the Table
Editor, select
Help > User Manual and look
in the Index for External Loss Tables .
7. You can change the title for each external
loss table. Select the title box and type
in a new title.
Note that the title is only a label. It is
not tied to the
fi le name of any table you
have loaded or saved.
8. Specify whether table corrections are
applied to
all acquired data or only to
traces in the Spectrum, Spectrogram,
Spurious and Amplitude vs Time
displays.
Corrections applied to data are
performed in real time using the digital
fi lter capabilities of the instrument. While
this has the advantage of correcting
the data for use in all measurements,
digital
fi ltering is limited in its ability to
apply corrections that change rapidly in
amplitude over small frequency ranges,
as may occur when switching between
two antennas. When this happens,
the
fi lters may result in an amplitude
correction that appears to ring in its
response, resulting in poorly corrected
data. For that reason, the RSA offers
trace-only correction for spectrograms,
spectrum, spurious, and amplitude vs.
time displays. These trace corrections
are similar to those applied in traditional
spectrum analyzers, and should be
used when discontinuities occur in the
amplitude/frequency correction table.
RSA6100A Series & RSA5100A Series Quick Start User Manual 61