3
rd
Generation Rack-
Mount RDMS™
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Quasonix, Inc.
When the BCS is disabled, the back-panel data output from the Combiner comes from the Diversity Combiner
demodulator, as it traditionally has.
Another unique advantage of the BCS is that its output can be encapsulated using IRIG-standard Data Quality
Encapsulation (DQE) for use by an external Best-Source Selector (BSS). This capability allows spatial diversity
across a vast range with a minimal number of BSS channels and attendant bandwidth. Further, since the BCS need
only accommodate relatively miniscule latency differences between its inputs, its local performance may exceed that
of a BSS designed to handle several seconds of time delay between channels. Driving an external BSS with several
RDMS™ BCS outputs leverages the strengths of both.
Best Channel Selector Status
Best Channel Selector status is only displayed with the Combiner option enabled and set to On. This status displays
in the right-hand side of the combiner signal indicator window, to the left of the combiner Signal Quality (Q) status,
as shown in Figure 95.
Figure 95: Best Channel Indicator Example
Two status items display for the BCS. First, BCS Signal Quality is indicated with a color-coded bar that indicates
the data quality for the presently selected channel. Numerical data quality is shown above the bar. This indicator
works just like the Combiner Signal Quality to the right of it. Second, BCS channel selection is shown below the
BCS Signal Quality bar.
Each demodulated signal (Channel 1, Combiner, and Channel 2) is represented by a character in the BCS status
display (‘1’, ‘C’, and ‘2’ respectively). The color of each character designates the current state of that channel in the
best-channel selection process:
