Detroughing Function - Emerson R&S SGT100A User Manual

®
R&S SGT100A
"Detroughing"
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:MODE

Detroughing Function

Selects the mathematical function describing the detroughing.
The following functions are available:
●
f(x) = x + d*e
●
f(x) = 1 - (1 - d)*cos(x*pi/2)
●
f(x) = d + (1 - d)*x
Where:
●
x depends on the "Envelope Voltage Adaptation" mode, see
●
d =
●
a =
For more information, see
played values"
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:DETRoughing:
FUNCtion
User Manual 1176.8674.02 ─ 12
The shaping function applies a detroughing to prevent that the supply
voltage V drops down to zero.
cc
Use the "Detroughing Factor"
low-power region.
Figure 6-21: Effect of a detroughing function on the envelope and inverted enve-
lope signal
1 = RF signal (simple ramp function)
2a, 2b = Envelope signal E and inverted envelope signal E Bar
-x/d
a
Detroughing Factor (d)
Exponent (a)
"Converting shaping functions and understanding the dis-
on page 171.
on page 499
Signal generator settings
Generation of envelope tracking signals
to limit the supply voltage V
2a
1
2b
Table 6-4
in the
cc
on page 495
191