R&S SMJ100A, Operating Manual

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Instrument Function
R&S
®
SMJ100A
283 Operating Manual 1403.7458.32 ─ 14
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select "Internal Baseband I/Q In", if the internally generated baseband signal is
used.
The RF bandwidth is reduced (see data sheet).
Alternatively, the input signal can be selected in the "I/Q Settings" menu (see Chap-
ter 5.6, "I/Q Modulation - I/Q Mod Block" , on page 282).
5.6.2 I/Q Settings
To open the menu for setting the I/Q modulation parameters, select "I/Q Mod > Config-
ure > I/Q Settings" or use the MENU key.
System error correction of the I/Q modulator permits precise and repeatable measure-
ments. The correction routine should be called in the case of temperature fluctuations
of several degrees. To call the routine, press the SETUP key and select "System >
Internal Adjustment " and execute the desired adjustment procedure.
It is not possible to activate an I/Q modulation with an external analog signal ("Analog
Wideband I/Q In") simultaneously with:
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AM,
●
digital modulation,
●
digital standards,
●
noise,
●
arbitrary waveform generation and
●
multi carrier CW
I/Q modulation is activated and the source entered in the top section of the menu.
I/Q impairment for specific impairment of the I/Q modulation is set in the "Impairments"
section.
I/Q control can be swapped in the lower section of the menu and the optimized settings
for wideband modulation signals can be activated.
I/Q Modulation - I/Q Mod Block