R&S SMJ100A, Operating Manual

Page: 300 / 874

Instrument Function
R&S
®
SMJ100A
284 Operating Manual 1403.7458.32 ─ 14
The bottom section of the menu differs depending on the selected input signal ("Analog
Wideband I/Q Input" or "Internal Baseband").
The crest factor is input for the external signal.
The gain is selected for the internal and external signal.
5.6.2.1 General I/Q Mod Settings
IQ Source - I/Q Mod
Selects the input signal for the I/Q modulator.
"Analog Wide-
band I/Q In" Selects an external analog signal as the input signal. The signal must
be applied at the inputs I and Q.
"Internal Base-
band I/Q In" Selects the internal baseband signal as the input signal. This setting
requires the additional equipment options for generating the various
baseband signals.
Remote command:
[:SOURce<hw>]:IQ:SOURce
on page 726
State - I/Q Mod
Activates/deactivates I/Q modulation.
If "Analog Wideband I/Q In" is selected, the I/Q modulator is also deactivated and acti-
vated.
If "Internal Baseband I/Q In" is selected, the I/Q modulator is always activated automat-
ically as soon as signal generation is activated in the "Baseband" block. It can, how-
ever, be deactivated later, e.g. if only the baseband signal which is output at the I/Q
outputs is relevant.
Remote command:
[:SOURce<hw>]:IQ:STATe
on page 726
5.6.2.2 Impairments
I/Q impairment for specific impairment of the I/Q modulation is set in the "Impairments"
section.
State - Impairments I/Q Mod
Activates/deactivates I/Q impairment.
I/Q Modulation - I/Q Mod Block