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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)