cx28348 Mindspeed Technologies, cx28348 Datasheet - Page 80

• Manufacturer Part Number: cx28348
• Description: Dual/triple/quad/hex/octal-enhanced Ds3/e3 Framer
• Manufacturer: Mindspeed Technologies

Functional Description
Figure 2-13. Line Coding Error Insertion
2-34
Label
1
2
3
4
Unipolar Input to
Encoder
Bipolar Output
Without Errors
Bipolar Output With
BPV Error Request
on A to H
Bipolar Output
With IIISub Error
Request on A to E
Figure 2-13
given unipolar input (assumes ideal conditions where there is no delay between the
error insertion request and its execution):
Line 1—Unipolar input (from transmitter circuitry to encoder) of 13 bits, marked A to M
Line 2—Bipolar output (from encoder to line) without errors
Line 3—Bipolar output with BPV error insertion requested on bits A to H
Line 4—Bipolar output with IllSub error insertion requested on bits A to E
The actual erroneous bits are circled in the
insertion are reversed compared to the original line 2 (i.e., bits K–M in line 3, and I–
M in line 4).
illustrates the possible bipolar outputs (in DS3 B3ZS) resulting from a
Mindspeed Technologies™
A
1
B
0
C
1
D
0
E
1
F
0
B
0
G
0
0
0
Figure
H
V
0
V
1
I
2-13. Bits following an error
J
1
K
B
0
L
0
0
CX28342/3/4/6/8 Data Sheet
M
0
V
28348-DSH-001-B
100542_016