R&S SGT100A, User Manual

Page: 174 / 593

Signal Generator Settings
R&S
®
SGT100A
143 User Manual 1176.8674.02 ─ 07
Parameter Value
"State" Not affected by the "Set to Default"
"RF Envelope" Off
"I/Q Output Type" Single Ended
"I/Q Level Vp (EMF)" 1 V
"Bias (EMF)" 0 V
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:PRESet
on page 426
Save/Recall
Accesses the "Save/Recall" dialog, that is the standard instrument function for storing
and recalling the complete dialog-related settings in a file. The provided navigation
possibilities in the dialog are self-explanatory.
The filename and the directory, in which the settings are stored, are user-definable; the
file extension is however predefined.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:SETTing:CATalog?
on page 426
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:SETTing:STORe
on page 426
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:SETTing:LOAD
on page 427
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:SETTing:DELete
on page 427
RF Envelope
In instruments equipped with option R&S SGT-K540, enables the output of a control
signal that follows the RF envelope. This control signal is provided for power amplifiers
envelope tracking testing. The signal is output at the I/I BAR connectors.
The envelope tracking (ET) is a method used by the modern power amplifiers (PA) to
improve their efficiency, especially when amplifying high crest factor RF signals. With
envelope tracking, the PA estimates, i.e. "tracks", the RF signal and varies the supply
voltage at the end amplifying stage synchronous to the changes in the RF signal.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:STATe
I/Q Output Type
Selects the type of output signal.
The provided parameters in the "I/Q Analog Outputs" dialog depend on the selected
output mode.
"Differential"
●
If "RF Envelope > On"
The inverted envelope signal
Ē
is output at the I BAR connectors.
●
If "RF Envelope > Off"
The analog I/Q signal components are output at the I/Q BAR con-
nectors.
I/Q Analog Output Settings