Rohde & Schwarz SMBV100A, Руководство по эксплуатации

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Instrument Function
R&S
®
SMBV100A
428 Operating Manual 1176.8016.02 ─ 17
Signal Period Mode
Selects the mode for calculating the resulting signal period of the multi carrier wave-
form. The carrier table provides an information button to obtain sample rate and file
length data of each carrier.
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
therefore 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 car-
rier 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.
"Least Common Multiple"
The output file duration is the least common multiple of all input file
durations.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:TIME:MODE
on page 632
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.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:TIME
on page 632
Power Reference
Defines the way the individual carriers in a composed multi carrier signal are leveled.
The difference between the provided modes is especially important if signals with dif-
ferent crest factors are composed together into a multi carrier signal.
Baseband Signal - Baseband Block