PM4328-PI PMC-Sierra, Inc., PM4328-PI Datasheet - Page 150

• Manufacturer Part Number: PM4328-PI
• Description: Framer, T1|E1|T3 Standard Format, 324-BGA
• Manufacturer: PMC-Sierra, Inc.

STANDARD PRODUCT
DATASHEET
PMC-2011596
PROPRIETARY AND CONFIDENTIAL
Table 6: PMON Counter Saturation Limits (E1 mode)
Table 7: PMON Counter Saturation Limits (T1 mode)
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
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.
Counter
FER
CRCE
Counter
FER
CRCE
FEBE
BER
4.0 X 10
cannot saturate
cannot saturate
Format
SF
ESF
SF
ESF
ISSUE 1
-3
BER
1.6 x 10
6.4 x 10
1.28 x 10
cannot saturate
137
-3
-3
-2
, the average counter event count
-1
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
PM4328 TECT3