Cisco Cisco Prisma II EDR Receiver Technical References
78-4016548-01 Rev C
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Conclusion
Conclusion
Prisma II 2.5 Gb/s 4:1 bdr products employ a combination of DSP techniques to
effectively double the signal capacity of the reverse path. These techniques produce
artifacts and noise which, though measurable, do not adversely affect performance
when suitable precautions are taken.
Artifacts in the 41-47 MHz may appear as a result of input signals at the transmitter
Artifacts in the 41-47 MHz may appear as a result of input signals at the transmitter
in the range of 34-40 MHz. These may be disregarded as they do not represent
additional loading of the bdr link.
Care must be taken to ensure that no signals are applied at the input of the
Care must be taken to ensure that no signals are applied at the input of the
transmitter in the range that might result in corruption of the desired signals.
Specifically:
For the 5-40 MHz version of the 2.5 Gb/s 4:1 bdr product, signals in the range
from 42 MHz to approximately 47 MHz should not appear at the transmitter
input.
For the 7-42 MHz version of the 2.5 Gb/s 4:1 bdr product, signals in the range
from 43-49 MHz should not appear at the transmitter input.
For the 10-45 MHz version of the 2.5 Gb/s 4:1 bdr product, signals in the range
from 47-52 MHz should not appear at the transmitter input.
Below 22 dBmV composite power at the transmitter input, noise in the bdr output is
mainly due to quantization noise in the A/D-D/A transfer characteristic. As the
loading on an individual link changes, the quantization noise floor changes. Noise
floor degradation may affect system performance as multiple links are combined.