R&S ESU Series Operating Manual page 355

R&S ESU
Fig. 4.23 Normalized measurement, shifted with REF VALUE POSITION 50%
Remote command:
REF VALUE The REF VALUE softkey activates the input of a value which is assigned to the ref-
erence line.
With default settings the reference line corresponds to a difference of 0 dB between
the currently measured trace and the reference trace. Setting the REF VALUE to a
different value helps to compensate for changes to the level conditions in the signal
path after the calibration data have been recorded. If e.g. after a source calibration a
10 dB attenuation is inserted into the signal path between DUT and R&S ESU input,
the measurement trace will be moved by 10 dB down. Entering a REF VALUE of –
10 dB will then result in the reference line for difference calculation being moved by
10 dB down as well. This means that the measured trace will be placed on it, as dis-
played in
REF VALUE always refers to the active window.
4.324
DISP:WIND:TRAC:Y:RPOS 10PCT
Fig. 4.24.
Instrument Functions
Tracking Generator – Option R&S FSU-B9
Operating Manual 1302.6163.12 - 03