R&S ESU Series - Page 50

Operating Manual 1302.6163.12 - 03 4.19
R&S ESU Instrument Functions
Receiver Mode
Display Unit
dBµV|
dBm |
dBµA|
dBpW |
dBpT |
dBmV |
dB*/MHz
In the side menu, the desired units for the level axis can be selected: dBµV, dBm,
dBµA, dBpW, dBpT or dBmV. Default setting is dBµV.
In general, a receiver measures the signal voltage at the RF input. The level display
is calibrated in rms values of an unmodulated sinewave signal.
Via the known input resistance of 50 Ω a conversion can be made to other units. The
units dBµV, dBm, dBµA, dBpW, dBpT and dBmV are directly convertible.
The dB*/MHz softkey activates/deactivates the display of results in units relative to
the bandwidth. These units are derived from the logarithmic units dBµV, dBµV/m,
dBµA and dBµA/m:
Switching over is possible also if 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):
with P = display level; other combinations are not allowed.
Remote command: CALC:UNIT:POW | DBUV_MHZ | DBUA_MHZ |
DBMV_MHZ
RF INPUT
AC | DC
The RF INPUT AC/DC softkey switches between AC and DC coupling of the instru-
ment input. The state of the input coupling is displayed with an enhancement label
on the right side of the diagram.
Unit Relative unit
dBµV dBµV/MHz
dBµV/m dBµV/mMHz
dBµA dBµA/MHz
dBµA/m dBµA/mMHz
dBpW dBpW/MHz
dBpT dBpT/MHz
dBmV dBmV/MHz