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MS-TestPro USER GUIDE
MAX ERR and MSE ERR
The MSolutions MS-TestPro measures both the quality of the signal being passed over the
cable, and the cables ability to pass the signal. These two pieces of performance data are
defined by MAX ERR and MSE ERR.
MAX ERR: the per-channel maximum recorded value of the residual error for PAM-8/-
16 modulation:
The Max Error measurement is the absolute value of the maximum distance between the
input signal on a given channel and the decision threshold in the HDBaseT modulation
detection scheme. This measurement behaves as a peak detector, so the value read is
always the maximum error witnessed on the channel. This refers directly to the HDBaseT
Receiver chips ability to un-modulate the signal and correct errors that are encountered.
MSE ERR: the per-channel mean square of the residual error for PAM-8/-16
modulation:
The Mean Square Error (MSE) value is a fractional negative number of decibels (dB). The
higher the absolute value of the MSE, the better the quality of the HDBaseT signal (i.e.
-19.8dB is better than -18.3dB). This refers to the quality of the CATx cable with regards to
the resistance (based on the quality of the copper vs the overall length of the cable) applied
to the signal.
HDBaseT is an Asymettical Link meaning that the technology has a higher rate of data
transmission from TX to RX, than it has from RX to TX. The MS-TestPro will test for data
flow in both directions, allowing for a true reflection of the link quality for all HDBaseT
functionality.
