Signal Generator Settings
R&S
®
SGT100A
168
User Manual 1176.8674.02 ─ 07
2. Enable "RF Envelope > On".
3. Enable "Envelope Voltage Adaptation > Auto Power/Normalization".
4. Select "I/Q Analog Settings > Shaping".
With the provided settings, you can configure the shape of the RF envelope signal.
The instrument applies the settings and calculates the shaping function. A diagram
visualizes the resulting envelope shape, as function of the selected supply voltage
V
cc
and PEP
in
value limits, the calculated pre-gain and the estimated operating
point of the PA.
Figure 7-15: Understanding the displayed information ("Envelope Voltage Adaptation > Auto
Power", "Shaping > Detroughing")
1a, 1b = Indicates the values of
2a
= Values smaller than PEP
in
Min are clipped
2b
= Values greater than PEP
in
Max are clipped
3
= Operating point; corresponds to the RF RMS power level
3a
= Current RF RMS power level; an enabled "RF Level > Level Offset" is considered
3b
= Current V
CC
4
= Crest factor of the generated signal
5a, 5b = The values correspond to the PEP of the generated RF signal and the V
CC
; shaded area indi-
cates the calculated
6
= Current envelope shape, defined by the detroughing function and detroughing factor
See also:
●
"Converting Shaping Functions and Understanding the Displayed Values"
Generation of Envelope Tracking Signals
