PM4328 View Datasheet(PDF) - PMC-Sierra
Part Name
Description
MFG CO.
'PM4328' PDF : 250 Pages View PDF
STANDARD PRODUCT
DATASHEET
PMC-2011596
ISSUE 1
Table 6: PMON Counter Saturation Limits (E1 mode)
PM4328 TECT3
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
Counter BER
FER
4.0 X 10-3
CRCE cannot saturate
FEBE
cannot saturate
Table 7: PMON Counter Saturation Limits (T1 mode)
Counter
FER
CRCE
Format
SF
ESF
SF
ESF
BER
1.6 x 10-3
6.4 x 10-2
1.28 x 10-1
cannot saturate
Below these 50% points, the relationship between the BER and the counter
event count (averaged over many one second samples) is essentially linear.
Above the 50% point, the relationship between BER and the average counter
event count is highly non-linear due to the likelihood of counter saturation. The
following figures show this relationship for various counters and framing formats.
These graphs can be used to determine the BER, given the average event
count. In general, if the BER is above 10-3, the average counter event count
cannot be used to determine the BER without considering the statistical effect of
occasional counter saturation.
Figure 28 illustrates the expected count values for a range of Bit Error Ratios in
E1 mode.
PROPRIETARY AND CONFIDENTIAL
137
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