Instrument Function
R&S
®
SMU200A
416Operating Manual 1007.9845.32 ─ 15
The resulting period is always calculated for all carriers in the carrier table irrespective of
their state (ON/OFF).
Note: Wrap-around and timing problems may occur when I/Q signals of different length
are used. Thus, demodulation of a carrier may be difficult or even impossible. It is there-
fore recommended to consider the timing already when creating the input I/Q files or to
adjust the signal duration to the carrier which is subsequently demodulated (in this case,
the other carriers are for interfering the signal only). These problems do not arise with
signals of the same standard (e.g. 3GPP).
The following modes are available:
"Longest File
Wins"
The resulting signal period is defined by the longest I/Q file in the carrier
table. Shorter I/Q files are periodically repeated.
"Shortest File
Wins"
The resulting signal period is defined by the shortest I/Q file in the carrier
table. Only the first part of longer I/Q files is used.
"User"
The signal period can be set by the user in the "Signal Period" field.
Shorter I/Q files are repeated periodically, and only the first part of longer
I/Q files is used.
SCPI command:
[:SOURce<hw>]:BB:ARB:MCARrier:TIME:MODE on page 609
Signal Period
Sets the signal period in Signal Duration Mode "User". Shorter I/Q files are repeated
periodically, and only the first part of longer I/Q files is used.
SCPI command:
[:SOURce<hw>]:BB:ARB:MCARrier:TIME on page 609
Carrier Table Submenu
Calls the table for configuring individual carriers. A selectable carrier range can be set
with the aid of the optional "Carrier Table Assistant" (see chapter 5.8.4.3.4, "Muti Carrier
Table", on page 418).
The multi carrier configuration can be checked with the aid of the "Carrier Graph".
Carrier Graph
Calls a graphical representation of the current multi carrier configuration in the frequency
domain.
The height of the bars corresponds to the chosen gain of each individual carrier. The
bandwidth of the carriers signals is indicated by the width of the bars.
Baseband Signal - Baseband Block
To Next Page
Loading...
