Instrument Function
R&S
®
SMBV100A
454Operating Manual 1176.8016.02 ─ 17
Baseband Input General Settings
State
Switches On/Off the feeding of an external digital signal into the signal path.
Note: Analog signals are directly applied to the I/Q modulator. The settings are made
in the I/Q Mod menu (see section Chapter 5.6, "I/Q Modulation - I/Q Mod Block",
on page 296).
"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.
Remote command:
[:SOURce<hw>]:BBIN:STATe on page 722
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 inter-
nally generated baseband signal (see description "Digital Standard CDMA2000").
Remote command:
[:SOURce<hw>]:BBIN:IQSWap[:STATe] on page 718
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.
External Baseband Signal - Baseband Input
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