Signal Generator Settings
R&S
®
SGT100A
138
User Manual 1176.8674.02 ─ 07
"High Quality"
With "Source > Internal Baseband", enable an optimization by com-
pensation for I/Q skew and frequency response correction. The set-
ting times, however, increase.
Use this mode to generate an extremely flat signal. For information
on the I/Q modulation performance, see the data sheet.
Remote command:
[:SOURce<hw>]:BB:IMPairment:OPTimization:MODE
Crest Factor
Available only for "Source > Analog Wideband I/Q Input"
Sets the crest factor of the external analog signal.
The crest factor gives the difference in level between the peak envelope power (PEP)
and average power value (RMS) in dB.
This value is necessary to allow the correct output power to be generated at the RF
output. When the set output power is generated, the R&S
SGT uses this value to com-
pensate the average power which is lower compared to the peak power.
The maximum input voltage at the I/Q input is equated to the peak power and is used
as the "reference" for setting the level of the output signal. Since the signal does not
usually supply the peak power at a constant level and instead supplies a lower average
power, the crest factor specifies how many dB have to be added internally so that the
correct output power is achieved.
Remote command:
7.3.3.2
Analog Impairments
► To access this dialog, select:
a) "SGMA-GUI > Instrument Name > IQ Mod > Analog Impairments"
b) "SGMA-GUI > Instrument Name > Impairments >Analog Impairments"
I/Q Modulation and Impairment Settings
