Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

ESIB
Analyzer - Level Display/RF Input
Display Units
Generally, a spectrum analyzer measures the signal voltage at the RF input. The level display is
calibrated in terms of therms values of an unmodulated sine wave. In the initial state, the level is
displayed at a power of 1 milliwatt (= dBm). As the input impedance is known to be 50Ω or 75Ω,
conversion to other units is possible. The units dBm, dBµV, dBµA, dBpW, V, A and W are directly
convertible and can be selected in the REF UNIT menu.
Units dB../MHz have a special status. They are applicable for broadband pulse signals. The measured
pulse voltage or the pulse current is referred to 1 MHz bandwidth. This conversion is not useful for
narrowband or sinewave signals.
If the antenna coded connector on the front panel is used, the coded unit there determines the possible
display units. Connecting to the coded connector deactivates the settings of the UNIT menu.
By certain codings it is nevertheless possible to select a conversion of the unit in the menu. The
dependencies between the unit of the antenna coded connector or the unit of the transducer and the
unit which is to be selected for the display are given in the softkey description.
The default coding defined by the connector can be switched off using the PROBE CODE ON/OFF
softkey. In this case, the unit can be set with the corresponding unit softkeys (dBm, dBµV, ... ) even if a
coded connector is plugged in. The coded entries in the connector are then ignored.
Note:
The units dBµV/m and dBµA/m can only be set via the unit of a transducer or via the unit of the
coded connector.
LEVEL REF UNIT submenu:
UNIT
UNIT
dBm
dBmV
dBµV
dBµA
The UNIT softkey opens a sub-menu in which the desired
units for the level axis can be selected and the coding of the
antenna coded connector can be switched on and off.
The selected units are valid for both displays when two
measurement windows are displayed.
The unit softkeys are mutually exclusive selection switches.
Only one of these switches may be active at any one time.
dBpW
dB* / MHz
VOLT
AMPERE
WATT
PROBE CODE
ON / OFF
1088.7531.12 4.167 E-15