R&S SMJ100A, Operating Manual

Page: 323 / 874

Instrument Function
R&S
®
SMJ100A
307 Operating Manual 1403.7458.32 ─ 14
EX-I/Q-Box Settings… - Digital I/Q Output
(With a connected R&S EX-IQ-BOX only)
Opens the main settings dialog of the R&S EX-IQ-BOX.
Remote command:
n.a.
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
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
SMJ-
B18, Digital I/Q Out). The sample rate is estimated and displayed in
the field "Value".
Remote command:
[:SOURce<hw>]:IQ:OUTPut:DIGital:SRATe:SOURce
on page 736
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".
Remote command:
[:SOURce<hw>]:IQ:OUTPut:DIGital:SRATe
on page 735
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 over-
flow in signal transmission.
"URUN =
Underrun" The external sample rate is too low which causes an underrun in sig-
nal transmission.
Remote command:
[:SOURce<hw>]:IQ:OUTPut:DIGital:SRATe:FIFO[:STATus]?
on page 736
Signal Output
The level of the output signal is set in the "Signal Output" section. For entering the
value, level type "Peak Level" or "Level" can be selected.
Impairment of Digital I/Q Signal and Noise Generator - AWGN/IMP Block