R&S SGT100A User Manual page 130

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R&S SGT100A
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"
"Shortest File Wins"
"User"
"Least Common Multiple"
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:TIME:MODE
Signal Period
Available only for "Signal Period Mode > User"
Sets the signal period. 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
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.
"RMS"
User Manual 1176.8674.02 ─ 07
The resulting signal period is defined by the longest I/Q file in the car-
rier table. Shorter I/Q files are periodically repeated.
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.
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.
The output file duration is the least common multiple of all input file
durations.
The individual carriers are leveled based on their RMS power and the
configured "Carrier Gain".
Example:
A multi carrier signal is composed from two waveform files.
First carrier "Gain" = 0 dB
Second carrier "Gain" = -3 dB
In the resulting multi carrier signal, the RMS power of the second car-
rier signal will be 3 dB lower than the RMS power of the first carrier
signal.
Signal Generator Settings
Baseband
on page 383
on page 383
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