Cc Offset; Pa Characteristics; Cc Min/Max - R&S SGT100A User Manual

®
R&S SGT100A
V Offset ← DC Modulator characteristics
cc
Applies a voltage offset on the supply voltage
offset from the external DC modulator. The envelope output voltage
reduced by this value to maintain the supply voltage V
Figure 7-13: Effect of a Vcc offset
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:VCC:OFFSet

PA characteristics

Refer to the product documentation of the PA for information on its characteristics.
The following settings are required:
V Min/Max ← PA characteristics
cc
Sets or displays the minimum and maximum values of the supply voltage V
required by the used power amplifier (PA).
The value range of the supply voltage V
driving voltage V
Max ≤ V
V
cc
The V
V =
cc
Example:
Envelope Voltage Reference = V
V Offset = 0 mV
cc
V Max = 1 V = 0 dBV
cc
Gain = 3 dB
V Max [dBV] - Gain [dB] = V
cc
V Max = 0 dBV - 3 dB = -3 dBV = 0.708 V
out
User Manual 1176.8674.02 ─ 07
of the used external DC modulator and the enabled V
pp
Max
pp
is calculated as follows:
cc
Vout*Gain + V Offset
cc
Generation of Envelope Tracking Signals
V Min/Max, i.e. compensates a possible
cc
is determined by the allowed peak-to-peak
cc
cc
Max or
out
Signal Generator Settings
V Min/Max
out
in the defined value range.
cc
on page 439
cc
Offset.
cc
is
, as
164