Rohde & Schwarz 1157.3458.02, Руководство по эксплуатации, Страница: 49 / 80

R&S FSH-K1 Command Description
1157.3564.12 43 E-8
LIMDEF (Define Limit Line)
This command defines a limit line.The list of parameters are the following:
<name>,<description>,<x-unit>,<x-scale>,<y-unit>,<x0>,<y0>[,...<xn>,<yn>]
The parameter <name> and <description> are strings. The parameters x-unit and y-unit are listed in the
tables below:
Parameter x-unit:
Value Unit
0 Hz
1 Seconds
2 Meter
The parameter x-scale defines whether the x values are absolute values or relative values according to
the center x value:
Value x-scale
0 Absolute
1 Relative
Parameter y-unit:
Value Unit
0 dB
1 dBm
2 dBµV
3 dBmV
4 dBµV/m
5 dBµA/m
6 VSWR
7 Rho
8 Volt
9 Watt
10 Volt/m
11 Watt/m
2
12 Seconds
13 Degrees
The following example defines the limit line “LIMIT”, with description “Max” in dBm on the frequency
axis (Hz) as an absolute limit line with 4 values (100MHz -30dBm, 200MHz -10dBm, 300MHz -10dBm,
400MHz -30dBm):
Example:
set<cr>
0<cr>
limdef,LIMIT,Max,0,0,1,100e6,-30,200e6,-10,300e6,
-10,400e6,-30<cr>
‘defines limit line “LIMIT”
0<cr>
‘responds parameter ok
Note: To replace an existing limit line in the instrument it has to be deleted first by using the LIMDEL
command described below.