R&S SGT100A, Руководство пользователя

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Signal Generator Settings
R&S
®
SGT100A
173 User Manual 1176.8674.02 ─ 07
The detroughing factor is calculated as follows:
d = V
cc
Min/V
cc
Max
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:DETRoughing:
COUPling
on page 446
Detroughing Factor (d)
Sets a start offset to limit the supply voltage V
cc
in the low-power region.
The detroughing factor also controls the shaping. A "Detroughing Factor = 0" defines a
linear function.
See also "Couple Detroughing Factor with Vcc" on page 172.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:DETRoughing:
FACTor
on page 446
Exponent (a)
Sets the exponent (a) for the third detroughing function, see Detroughing Function .
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:DETRoughing:
PEXPonent
on page 447
Pre-Gain
In " Envelope Voltage Adaptation > Manual" mode, sets a pre-gain (i.e. an attenuation)
applied to define the operating range of the power amplifier. The pre-gain can be used
to define and test only a specific (required) part of the operating range.
In "Envelope Voltage Adaptation > Auto" mode, the value is calculated automatically as
following:
"Pre-Gain" = "Pin max" - "RF Level" + Crest Factor
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:GAIN:PRE
on page 443
Post-Gain
In " Envelope Voltage Adaptation > Manual" mode, sets a post-gain to compensate the
attenuation introduced by the pre-gain and the gain of the shaping function.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:ENVelope:SHAPing:GAIN:POST
on page 443
Polynomial Coefficients
Accesses a dialog to describe the envelope shape as a polynomials function, see
Chapter 7.5.7, "Polynomial Coefficients Setting" , on page 176.
Shaping Table
Accesses the standard "Envelope Select" dialog with functions to define a new shaping
table file, select or edit an existing one.
Generation of Envelope Tracking Signals