Rohde & Schwarz SMU200A - Page 335

Instrument Function
R&S
®
SMU200A
315Operating Manual 1007.9845.32 ─ 15
Sample Rate
In the "Sample Rate" section the sample rate for the digital I/Q output signal can be set
and the state of signal transmission is indicated by the FIFO Status.
Sample Rate Source - Digital I/Q Output
Selects the source for the sample rate of the digital I/Q output signal.
Note: With a connected R&S EX-IQ-Box either the internal clock source (User defined)
or an external clock (Digital I/Q In) can be selected in the settings dialog of the R&S EX-
IQ-Box. Therefore, the sample rate source is only indicated in this field.
"User Defined"
The internally generated clock reference signal is used. The sample rate
is calculated and displayed in the field "Value".
"Digital I/Q In"
An external clock reference signal is used. The clock signal is fed in via
a "Baseband Input Module" (option R&S SMU-B17). The sample rate is
estimated and displayed in the field "Value".
"Digital I/Q Out"
An external clock reference signal is used. The clock signal is directly fed
in via pin CLK2 of the digital output interface (option R&S SMU-B18,
Digital I/Q Out). The sample rate is estimated and displayed in the field
"Value".
SCPI command:
[:SOURce<hw>]:IQ:OUTPut:DIGital:SRATe:SOURce on page 738
Sample Rate Value - Digital I/Q Output
Sets or displays the sample rate of the digital I/Q output signal, depending on the selected
sample rate "Source".
SCPI command:
[:SOURce<hw>]:IQ:OUTPut:DIGital:SRATe on page 737
FIFO Status - Digital I/Q Output
Indicates the state of the signal transmission.
"OK"
Resampling is working properly.
"OFL = Over-
flow"
The external sample rate frequency is too high which causes an overflow
in signal transmission.
"URUN =
Underrun"
The external sample rate is too low which causes an underrun in signal
transmission.
SCPI command:
[:SOURce<hw>]:IQ:OUTPut:DIGital:SRATe:FIFO[:STATus] on page 737
Signal Output
The level of the output signal is set in the "Signal Output" section. For entering the value,
level type "PEP" or "Level" can be chosen.
Set Level Via - Digital I/Q Out
Selects the level type (PEP/Level) that is used to set the signal level of the currently
selected path. Either the PEP or the Level entry field can be edited.
Impairment of Digital I/Q Signal and Noise Generator - AWGN/IMP Block