Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

Transmission measurement - Tracking generator
ESIB
If, after source calibration, a 10 dB attenuator is inserted into the signal
path between DUT and analyzer input, the measurement trace will be
moved down by 10 dB. Entering a REF VALUE of –10 dB then moves the
reference line down 10 dB. This means that the measured trace and the
reference trace coincide again.
After the reference line has been moved by entering a REF VALUE of –10
dB, deviations from the nominal power level can then be displayed with a
high resolution (e.g. 1 dB/div). The power is still displayed in absolute
values, which means that in the above example 1 dB below the nominal
power (reference line) is equivalent to an attenuation of 11 dB.
Fig. 4-25
Measurement of a 10dB attenuator pad with 1 dB / Div
IEC/IEEE bus command
:DISPlay[:WINDow]:TRACe:Y[:SCALe]:RVALue
RECALL
The RECALL softkey restores the instrument setting that were used during
calibration.
This can be useful if the device setting was changed after calibration (eg
center frequency setting, frequency deviation, reference level, etc. ).
The softkey is only offered if:
• the analyzer mode has been selected
• the memory contains a calibration data set.
IEC/IEEE bus command :[SENSe:]CORRection:RECall
1088.7531.12 4.270 E-15