Rohde & Schwarz R&S SGS100A - Preset

Signal generator settings
R&S
®
SGS100A
135User Manual 1173.9105.02 ─ 13
Offset
Sets the carrier offset (in percent) of the amplitudes (scaled to the peak envelope
power (PEP) for the I and/or Q signal component. An ideal I/Q modulator suppresses
the carrier offset completely (offset = 0 percent).
For more information, see Chapter 9.8.1.2, "I and Q offset", on page 132.
Remote command:
[:SOURce]:IQ:IMPairment:LEAKage:I on page 271
[:SOURce]:IQ:IMPairment:LEAKage:Q on page 271
Gain Imbalance
Sets the imbalance of the I and Q vector (see Chapter 9.8.1.1, "Gain and gain imbal-
ance", on page 131).
The entry is made in dB (default) or %, where 1 dB offset is roughly 12 % according to
the following:
Imbalance [dB] = 20log ( | GainQ | / | GainI |)
Positive values mean that the Q vector is amplified more than the I vector by the corre-
sponding percentage. Negative values have the opposite effect.
Remote command:
[:SOURce]:IQ:IMPairment:IQRatio[:MAGNitude] on page 270
Quadrature Offset
Sets the quadrature offset (see Chapter 9.8.1.3, "Quadrature offset", on page 132).
Remote command:
[:SOURce]:IQ:IMPairment:QUADrature[:ANGLe] on page 271
9.9 Preset
Calls up a defined instrument setup. Presets all parameters and switching states
including inactive operating modes. The default instrument settings provide a reprodu-
cible initial basis for all other settings. However, functions that concern the integration
of the instrument into a measurement setup are not changed, e.g., reference oscillator
settings.
Overview of the most important preset states
The following list gives an overview of the presets for the most important generator set-
tings. The other presets can be found in the information accompanying the remote
commands.
●
"RF frequency" = 1 GHz
●
"Reference frequency" = "Internal"; adjustment off
●
"RF output" switched off
●
"Modulator State" = Off
Preset