Agilent Technologies E4400-60230 g Manuale Utente Pagina 195

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Real-Time I/Q Baseband Generator User’s and Programming Guide 3-125
ESG Family Signal Generators Softkey Reference
Options UN8 and 202 O
Oversample Ratio
Press this softkey to specify the oversample ratio for a user-defined FIR
filter.
Range
Acceptable values range from 1 to 32. When the filter is selected for use,
the signal generator may resample the filter with an OSR between 4
and 16, based on the number of symbols, the symbol rate, and the
number of bits per symbol of the modulation type.
Generally, the higher the symbol rate, the lower the oversample ratio of
the resampled filter.The following table describes the signal generator’s
maximum oversample ratio capabilities for each modulation type:
Default Value: 4
Softkey Locations
Custom:
Mode > Custom > Filter > Define User FIR > Oversample Ratio
Other Formats: Mode > TDMA >
desired format
> Modify Standard >
Filter > Define User FIR > Oversample Ratio
Modulation
Type
BPS
Maximum OSR
16 Symbols > 16 Symbols
BPSK
MSK
2-LVL FSK
116 8
QPSK
IS95 QPSK
ISAT QPSK
OQPSK
IS95
OQPSK
216 8
8PSK
D8PSK
8-LVL FSK
315 6
16PSK
16QAM
416 8
32QAM 5 15 5
64QAM 6 15 6
256QAM 8 16 8
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