Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

Level Display/RF Input - Analyzer
ESIB
dBm
dBmV
The dBm, dBµV, dBmV, dBµA, dBpW softkeys set the display units to the
corresponding logarithmic units. The dBm unit is the default unit in analyzer
mode.
The units dBm, dBµV, dBmV, dBµA cannot be selected when the coded
antenna connector or the used transducer defines a unit.
Only for coding dB, the conversion to the desired units is permitted.
dB µ V
IEC/IEEE-bus command
:CALCulate:UNIT:POWer DBM |DBMV |DBUV |DBUA |DBPW
dB µ A
dBpW
dB* / MHz
The dB*/MHz softkey activates/disactivates the display of results in units
relative to the bandwidth. Those units can be derived from the logarithmic
units dBµV, dBµV/m, dBµA and dBµA/m.
This leads to the following relative units:
dBmV ⇒ dBmV/MHz
dBµV ⇒ dBµV/MHz
dBµV/m ⇒ dBµV/mMHz
dBµA ⇒ dBµA/MHz
dBµA/m ⇒ dBµA/mMHz
Switching over is possible also if a coded antenna connector or a transducer
fixes the unit to be used.
Conversion to 1 MHz is via the pulse bandwidth of the selected resolution
bandwidth B imp according to the following equation (example for dBµV) :
P/(dBV/MHz) 20 log B imp
µ = ⋅ / MHz
+ P/(dBV) µ ,
1MHz
where P = display level
The dBµV/MHz unit can be combined with the following coded connector or
transducer units
dB (the unit dBµV/MHz remains )
µV/m (yields the display unit dBµV/mMHz)
analogous for dBµA/MHz:
dB and µA (the unit dBµA/MHz remains)
Other combinations are not allowed.
IEC/IEEE-bus command
:CALCulate:UNIT:POWer DBUV_MHZ|DBUA_MHZ|DBMV_MHZ
1088.7531.12 4.168 E-15