Instrument Function
R&S
®
SMBV100A
387Operating Manual 1407.6062.32 ─ 08
"On"
Switches On the external I/Q input signal of the "BB In/Out" block. The
input symbol displays the active signal mode.
"Off"
Switches Off the external I/Q input signal.
SCPI command:
[:SOURce]:BBIN:STATe on page 615
I/Q-Swap
Activates swapping of the I and Q signal components, which mirrors the spectrum at the
f=0 line and inverts the sign of the frequency.
The I/Q swap may be needed if an external CDMA signal is to be added to an internally
generated baseband signal (see description "Digital Standard CDMA2000").
SCPI command:
[:SOURce]:BBIN:IQSWap[:STATe] on page 612
Sample Rate
For digital input signals the section "Sample Rate" is available in the "Baseband Input
Settings" dialog. The sample rate of the external digital baseband signal can be set and
the state of signal transmission is indicated by the FIFO Status.
Sample Rate Source
Selects the source for estimating the sample rate or defining it by the user.
"User Defined"
Enables the user to define the sample rate in the entry field value.
"Digital I/Q In"
Estimates the sample rate on the digital I/Q input and displays the value
in the value field.
Note: Estimation works best if the sample rate is close to the user
defined value.
SCPI command:
[:SOURce<hw>]:BBIN:SRATe:SOURce on page 615
Sample Rate Value
Sets the sample rate of the external digital baseband input signal.
SCPI command:
[:SOURce]:BBIN:SRATe:ACTual on page 614
FIFO Status
Digital Input only
Indicates the state of the signal transmission.
Note: The FIFO status is a SCPI parameter that is not displayed in the GUI.
"OK"
Resampling is working properly.
External Baseband Signal - Baseband Input
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