None of the one you mentionned, this unit is a low level sweep system produce by Avantron from Montreal, now part of Sun Rise Telecom. It require a headend piece (low level sweep) and a receiver (also spectrum analyzer). It is also the QAM readder used by CISCO for 54 or 256 QAM. The beauty with this unit, it is a low sweep system that take sample of the bandwidth every 300 Khz, so you get a full description of the spectrum and at the same time it does not affect 64 or 256 QAM. Attached is a C/N function of the same unit.