Rohde & Schwarz SME02 - Level Offset; Interrupt-Free Level Setting; Fig. 2-19 Example of a Circuit with Level Offset

SME RF Level
1038.6002.02 2.45 E-13
2.5.1 Level Offset
The SME offers the possibility of entering the offset (OFFSET) of a possibly series-connected
attenuator/amplification element in the LEVEL-LEVEL menu. The indication/input value in the LEVEL
header field considers this input (see below) and represents the level value of the signal at the output of
the series-connected instrument (cf. Fig. 2-19).
The entry values AMPLITUDE and OFFSET in the menu LEVEL or LEVEL in the header line are related
to the RF output level as follows:
LEVEL - OFFSET = output level (= AMPLITUDE)
An offset entry causes no modification of the RF output frequency but only a modification of the display
value in the LEVEL field in the header line, ie LEVEL in the header line indicates the offset-associated
level and AMPLITUDE in the menu LEVEL the RF output level. The status line indicates LEV-OFFST.
The offset is to be entered in dB.
The offset setting also remains effective in the ATTENUATOR MODE FIXED operating mode and with
level sweep.
×Ø
SME
Input value
OFFSET
(LEVEL menu)
RF output signal
(AMPLITUDE in the LEVEL menu)
Attenuation/
Amplification
LEVEL in the header field
Fig. 2-19 Example of a circuit with level offset
2.5.2 Interrupt-free Level Setting
In the ATTENUATOR MODE FIXED operating mode, level settings are carried out without interruption.
An electronic attenuation setting is used instead of the interrupting attenuator.
If the normal variation range of 23 dB is violated, the level under/overrange warning is displayed. In
these ranges, level accuracy and spectral purity are no longer guaranteed.