Agilent Technologies E8257C PSG Guida Utente Pagina 145

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Chapter 6 135
Custom Arb Waveform Generator
Working with Symbol Rates
QAM
Quadrature
Amplitude
Modulation
4QAM 2 90 bps 100 Mbps 45 sps 50 Msps 45 sps 25 Msps
16QAM 4 180 bps 200 Mbps 45 sps 50 Msps 45 sps 12.5 Msps
32QAM 5 225 bps 250 Mbps 45 sps 50 Msps 45 sps 10 Msps
64QAM 6 270 bps 300 Mbps 45 sps 50 Msps 45 sps 8.33 Msps
128QAM
There is no preset value for this
modulation, it must be user defined.
7 315 bps 350 Mbps 45 sps 50 Msps 45 sps 7.14 Msps
256QAM 8 360 bps 400 Mbps 45 sps 50 Msps 45 sps 6.25 Msps
Modulation Type
Bits
Per
Symbol
Bit Rate =
Symbols/s x Number of Bits/Symbol
Internal Symbol Rate
(Minimum Maximum)
Custom Real Time Only
External Symbol Rate
(Minimum Maximum)
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