Ewald,
Unfortunately, there are some hardware limitations. The lowest clock to the I/Q DAC is 53.333 kHz, so for 1 kbps you could use 64 samples per symbol at 64 kHz. The down side of this is that with only 2048 samples, you could only have a pattern up to 32 symbols. The software we provide requires at least 127 symbols for a PN7 sequence, so we cut off at 4 kHz symbol rate. But using an arb file, you could generate a 1 kbps, up to 32 bit pattern sequence.
To do this, you would have to ensure a phase continuous waveform when it crosses back from sample 2047 to sample 0. This places some limitations on modulation index.
