Rohde & Schwarz R&S FSP Series, Operating Manual

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R&S FSP Instrument Functions
Basic Settings
4.154 Operating Manual 1164.4556.12 - 06
Margin - Setting a margin.
The margin is defined as the signal-level distance to the limit line. When the limit line
is defined as an upper limit, the margin means that the level is below the limit line.
When the limit line is defined as a lower limit, the margin means that the level is
above the limit line. The default setting is 0 dB (i.e. no margin).
Remote command:
CALC:LIM3:UPP:MARG 10dB
CALC:LIM3:LOW:MARG 10dB
Threshold – Selection of the threshold value with relative Y scaling
With relative Y scaling, an absolute threshold value can be defined which lowers the
relative limit values. The function is useful especially for mobile radio applications
provided the limit values are defined in relation to the carrier power as long as they
are above an absolute limit value.
Example:
The preset value is at -200 dBm. The field is displayed if the value RELATIVE is
entered in the field Y-SCALING.
Remote command:
CALC:LIM3:UPP:THR -30 dBm
or
CALC:LIM3:LOW:THR -30 dBm
Comment - Enter comments
Comments are arbitrary, however, they must be less than 41 characters long.
Remote command:
CALC:LIM3:COMM "Upper limit"
VALUES The VALUES softkey activates the entry of the data points in the table columns
Time / Frequency and Limit/dB . Which table columns appear depends upon the
Domain selection in the table heading.
The desired frequency/time data points are entered in ascending order (two
repeated frequencies/time values are permitted).
Remote command:
CALC:LIM3:CONT:DATA 1MHz,3MHz,30MHz
CALC:LIM3:UPP:DATA -10,0,0
CALC:LIM3:LOW:DATA -30,-40,-40
RBW 300 Hz
VBW 3 kHz
SWT 100 ms
Marker [T1]
-28.4 dBm
200.0100 MHz
10 kHz/
Ref -20 dBm
Att 10 dB
Center 200 MHz
Span 100 kHz
relative limit line
absolute threshold
resulting limit