R&S ESU Series Operating Manual page 279

R&S ESU
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:
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:
Limit - Select upper/lower limit
A limit line can be defined as either an upper or lower limit. In receiver mode, only
the upper limit line is used.
Remote command:
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:
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:
R e f - 2 0 d B m
C e n t e r
4.248
CALC:LIM3:CONT:MODE ABS
CALC:LIM3:UPP:MODE ABS
CALC:LIM3:LOW:MODE ABS
CALC:LIM3:UNIT DBM
-- (defined by key words :UPPer or :LOWer)
CALC:LIM3:UPP:MARG 10dB
CALC:LIM3:LOW:MARG 10dB
R B W 3 0 0 H z
V B W 3 k H z
S W T 1 0 0 m s
A t t 1 0 d B
2 0 0 M H z
1 0 k H z /
M a r k e r [ T 1 ]
- 2 8 . 4 d B m
2 0 0 . 0 1 0 0 M H z
r e s u l t i n g l i m i t
a b s o l u t e t h r e s h o l d
r e l a t i v e l i m i t l i n e
S p a n 1 0 0 k H z
Operating Manual 1302.6163.12 - 03
Instrument Functions
Basic Settings