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L3M
TXC-03452B
DATA SHEET
Figure 34. Loopbacks, Test Generators and Analyzer
AISCLK
TCLK
LOS
DET
TLAISGN
1
AIS
Generator
Line In
0
1
TPRBS
To
(TX DS3/E3)
Synchronizer
TX PRBS Generator
1
0
0
L3LBK
HDB3/
B3ZS
Decoder
CVs
0
1
Counter
Errors
PRBS
Analyzer
Facility
Loopback
1
0
ENANA
AISCLK
TXANA
AIS
Generator
RAISGN
Line
Loopback
1
0
RPRBS
from desynchronizer
0
1
FLBK
1
0
0
1
RX PRBS Generator
HDB3/
B3ZS
Coder
Line Out
XOSCI
(VCXO)
(RX DS3/E3)
RAISGN
Figure 35. External Circuit to Maintain Clock Input to TX PRBS Generator
TCLK
Input
Lead
AISCLK
TX PRBS
Generator
TCLK
Detect
L3M
TCLK
TXC-03452B-MB
Ed. 6, April 2001
- 54 of 96 -
ETC [ ETC ]
