Table 10-27. bert error insertion rate, Table 10-28. bert repetitive pattern length select, Ster 2 – Rainbow Electronics DS26519 User Manual
Page 263
DS26519 16-Port T1/E1/J1 Transceiver
263 of 310
Register Name:
BC2
Register Description:
BERT Control Register 2
Register Address:
1106h + (10h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16
Bit
# 7 6 5 4 3 2 1 0
Name EIB2 EIB1 EIB0 SBE
RPL3 RPL2 RPL1 RPL0
Default
0 0 0 0 0 0 0 0
Bits 7 to 5: Error Insert Bits 2 to 0 (EIB[2:0]). Will automatically insert bit errors at the prescribed rate into the
generated data pattern. Can be used for verifying error detection features. See
.
Table 10-27. BERT Error Insertion Rate
EIB2 EIB1 EIB0
ERROR
RATE
INSERTED
0
0
0
No errors automatically inserted
0 0 1
10E-1
0 1 0
10E-2
0 1 1
10E-3
1 0 0
10E-4
1 0 1
10E-5
1 1 0
10E-6
1 1 1
10E-7
Bit 4: Single Bit Error Insert (SBE). A low-to-high transition will create a single bit error. Must be cleared and set
again for a subsequent bit error to be inserted.
Bits 3 to 0: Repetitive Pattern Length Select 3 to 0 (RPL[3:0]). RPL0 is the LSB and RPL3 is the MSB of a
nibble that describes the how long the repetitive pattern is. The valid range is 17 (0000) to 32 (1111). These bits
are ignored if the receive BERT is programmed for a pseudorandom pattern. To create repetitive patterns fewer
than 17 bits in length, the user must set the length to an integer number of the desired length that is less than or
equal to 32. For example, to create a 6-bit pattern, the user can set the length to 18 (0001) or to 24 (0111) or to 30
(1101). See
.
Table 10-28. BERT Repetitive Pattern Length Select
LENGTH
(BITS)
RPL3 RPL2 RPL1 RPL0
17 0
0
0
0
18 0
0
0
1
19 0
0
1
0
20 0
0
1
1
21 0
1
0
0
22 0
1
0
1
23 0
1
1
0
24 0
1
1
1
25 1
0
0
0
26 1
0
0
1
27 1
0
1
0
28 1
0
1
1
29 1
1
0
0
30 1
1
0
1
31 1
1
1
0
32 1
1
1
1