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QMultiFlex-400™ Installation and Operating Handbook
Repeat and compare the measurements of the hub and remote Es/No metrics to those
obtained prior to the canceller being enabled, as recorded in Table 8-4.
Remote Modem
Remote Modem 1
Remote Modem 2
Remote Modem 3
Remote Modem 4
Remote Modem 5
Remote Modem 6
Remote Modem 7
Remote Modem 8
Remote Modem 9
Remote Modem 10
Remote Modem 11
Remote Modem 12
Remote Modem 13
Remote Modem 14
Table 8-6 – Canceller Enabled, Hub and Remote Modem Es/No Values
Comparing the Rx Es/No values when the Hub Canceller is enabled, to those shown
previously where the Hub Canceller was disabled, we would expect the canceller to offer
approximately 0.1dB to 0.2dB of system degradation to each received channel (i.e. the Rx
carriers as measured at the Hub). This is because the hub-canceller has a finite near-signal
suppression performance of between 25 and 32dB depending on operational configuration.
(Figure 8-17 shows that the hub canceller near-signal suppression performance is just over
30dB).
Figure 8-18 – The Selected Zoomed Area
Hub Es/No
8-17
Remote Es/No
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