Trango Systems TrangoLINK GigaPlus - Table 4 MSE Expected and Maximum Values

Trango Systems, Inc. GigaPlus User Manual Rev 3.1 33
Interference can come from other transmitters on the tower, as well as from sources
inside an indoor shelter. High power transmitters inside a shelter can cause interference
when near the PoE device or when located very close to the cabling.
There are maximum acceptable MSE values for each modulation which are useful in
determining the quality of the link. The MSE value reported is only relevant to one tx-rx
path, so the MSE of each tx-rx path must be evaluated to verify the link is operating as
expected. The lower the number the better, so a -35dB is better than a -30dB. The table
below shows the maximum MSE value to expect in IF Loopback, Normal Operation, and
Absolute Maximum.
MSE Expected and Maximum Values (dB)
QAM256
QAM128
QAM64
QAM32
QAM16
QPSK
Maximum Expected value
IF loopback
-36
-36
-36
-36
-36
-36
Maximum Expected value
Normal operation at max
power
-34
-33
-32
-30
-30
-29
Absolute Maximum for 1E-
6 BER Sensitivity Threshold
-28
-25
-22
-19
-16
-9
Table 4 MSE Expected and Maximum Values