SMIQ Noise Generator and Distortion Simulator
1125.5555.03 2.389 E-9
Step-by-step instruction to enter a new distortion characteristic via IEC/IEEE bus:
1. Enter the name of a new characteristic
IEC/IEEE-bus command
:SOUR:DIST:DATA:SEL "TWTA1"
The characteristic is listed under a freely selectable
name (max. 8 characters) in the select menu that
comprises different characteristics.
2. Enter the data field for input values
(x-axis) of AM/AM conversion in dB
IEC/IEEE-bus command
:SOUR:DIST:DATA:AMB -23.5,-21.5,
-19.5,-17.5,-15.5,-13.5,-12.5,-11.5,
-10.5,-9.5,-8.5,-8,-7.5,-7,-6.5,-6,
-5.5,-5,-4.5,-4,-3.5,-3,-2.5,-2,-1.5,
-1,-0.5,0
3. Enter the data field for output values
(y-axis) of AM/AM conversion in dB
IEC/IEEE-bus command
:SOUR:DIST:DATA:AM -12.9,-10.9,-9,
-7.1,-5.4,-3.9,-3.2,-2.6,-2.2,-1.7,
-1.4,-1.2,-1,-0.8,-0.7,-0.5,-0.3,
-0.2,-0.1,0,0,-0.1,-0.1,-0.2,-0.4,
-0.5,-0.7,-0.8
4. Enter the data field for input values
(x-axis) of AM/PM conversion in dB
IEC/IEEE-bus command
:SOUR:DIST:DATA:PMB -23.5,-18.5,
-15.5,-12.5,-9.5,-6.5,-3.5,0
5. Enter the data field for output values
(y-axis) of AM/PM conversion in degrees
IEC/IEEE-bus command
:SOUR:DIST:DATA:PM 0,-2.1,-5,-11.6,
-17.7,-24.4,-31.9,-48.6
6. Enter the level correction
IEC/IEEE-bus command
:SOUR:DIST:DATA:LEV:CORR -3.12
7. Data transmission to the module
IEC/IEEE-bus command
:SOUR:DIST:REC
Note: The values of the above example correspond to the TWTA characteristic that is supplied.
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