R&S SGT100A, Руководство пользователя

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Signal Generator Settings
R&S
®
SGT100A
175 User Manual 1176.8674.02 ─ 07
Scale ← Graphic Configuration
Determines the units, "Voltage" or "Power", used on the x and y axis.
Table 7-11: Units on the x axis
"Scale > Power" "Scale > Voltage"
Envelope Voltage Adaptation > Auto Power P
in
[dBm] V
in
[V] =
√
P
in
Envelope Voltage Adaptation > Auto Nor-
malized
P
in
/P
max
V
in
/V
max
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:SCALe
on page 442
Diagram ← Graphic Configuration
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.
See Figure 7-15 .
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:VCC:VALue:LEVel?
on page 440
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:VCC:VALue:PEP?
on page 440
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:VCC:VALue?
on page 440
7.5.6 Edit I/Q Envelope Shape Settings
The envelope shaping table is a method to define the shaping function.
To access the internal table editor
1. Select "I/Q Analog > I/Q Analog Settings > General".
2. Enable "RF Envelope > On".
3. Select "Envelope Voltage Adaptation > Manual".
4. Select "Shaping Settings > Shaping > From Table".
5. Select "Shaping Table > Envelope Shaping File > New"
6. Enter the "File Name", e.g. MyLUT
The "Envelope Shaping File" dialog closes.
The "Shaping > Shaping Table" confirms that the newly created file is assigned.
7. Select "Shaping Table > Envelope Shaping File > Edit"
8. Define the value pairs "Vin/Vmax" and "Vcc/Vmax". The order is uncritical.
9. Select "Save".
Generation of Envelope Tracking Signals