Rohde & Schwarz R&S FSP Series, Operating Manual

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Operating Manual 1164.4556.12 - 06 4.153
R&S FSP Instrument Functions
Basic Settings
Remote command:
CALC:LIM3:CONT:DOM FREQ
X-Axis - Select interpolation
Linear or logarithmic interpolation can be carried out between the frequency refer-
ence points of the table. The ENTER key toggles between LIN and LOG selection.
Remote command:
CALC:LIM3:CONT:SPAC LIN
CALC:LIM3:UPP:SPAC LIN
CALC:LIM3:LOW:SPAC LIN
Scaling - selection of absolute or relative scaling
The limit line can either be scaled in absolute (frequency or time) or relative units.
Any of the unit keys may be used to toggle between
ABSOLUTE and RELATIVE ,
the cursor must be positioned in the X Scaling
or the Y Scaling line.
The RELATIVE scaling is always suitable, if masks for bursts are to be defined in the
time domain, or if masks for modulated signals are required in the frequency
domain.
An X offset with half the sweep time may be entered in order to shift the mask in the
time domain into the center of screen.
Remote command:
CALC:LIM3:CONT:MODE ABS
CALC:LIM3:UPP:MODE ABS
CALC:LIM3:LOW:MODE ABS
Unit - Select the vertical scale units for the limit line
The selection of units takes place in a selection box. The default setting is dBm .
Remote command:
CALC:LIM3:UNIT DBM
Limit - Select upper/lower limit
A limit line can be defined as either an upper or lower limit.
Remote command:
--
(defined by key words :UPPer or :LOWer)
A change in domain (frequency/time) is only permitted when the data point table is
empty.
X-Scaling ABSOLUTE The frequencies or times are interpreted as absolute
physical units.
X-Scaling RELATIVE In the data point table, the frequencies are referred to the
currently set center frequency. In time domain mode, the
left boundary of the diagram constitutes the reference.
Y-Scaling ABSOLUTE The limit values refer to absolute levels or voltages.
Y-Scaling RELATIVE The limit values refer to the reference level (Ref Level) or,
in case a reference line is set, to the reference line.
Limit values with the unit dB are always relative values.