mt9075bpr1 Zarlink Semiconductor, mt9075bpr1 Datasheet - Page 61

• Manufacturer Part Number: mt9075bpr1
• Description: E1 Single Chip Transceiver With Liu
• Manufacturer: Zarlink Semiconductor

Bit
7
6
5
4
3
2
1
0
3-0
Bit
7
6
5
4
CRCS1 Receive CRC Error Status One. If one, the evaluation of the last received submultiframe 1
CRCS2 Receive CRC Error Status Two. If one, the evaluation of the last received submultiframe 2
AIS16S Alarm Indication Signal 16 Status. If one, indicates an all ones alarm is being received in
RFAIL
RCRS
Name
LOSS
RAIS
AISS
resulted in an error. If zero, the last submultiframe 1 was error free. Updated on a
submultiframe 1 basis.
resulted in an error. If zero, the last submultiframe 2 was error free. Updated on a
submultiframe 2 basis.
Remote CRC-4 Multiframe Generator/Detector Failure. If one, each of the previous five
seconds have an E-bit error count of greater than 989, and for this same period the receive
RAI bit was zero (no remote alarm), and for the same period the SYNC bit was equal to
zero (basic frame alignment has been maintained). If zero, indicates normal operation.
Loss of Signal Status Indication. If one, indicates the presence of a loss of signal
condition. If zero, indicates normal operation. A loss of signal condition occurs when 127
consecutive bit periods are zero. A loss of signal condition terminates when an average
ones density of at least 12.5% has been received over a period of 127 contiguous pulse
positions starting with a pulse.
channel 16. If zero, normal operation. Updated on a frame basis.
Alarm Indication Status Signal. If one, indicates that a valid AIS or all ones signal is being
received. If zero, indicates that a valid AIS signal is not being received. The criteria for AIS
detection is determined by the control bit ASEL (page 01H, address 10H).
Remote Alarm Indication Status. If one, there is currently a remote alarm condition (i.e.,
received A bit is one). If zero, normal operation. Updated on a non-frame alignment frame
basis.
RAI and Continuous CRC Error Status. If one, there is currently an RAI and continuous
CRC error condition. If zero, normal operation. Updated on a multiframe basis.
Name
LLOS
ML
SL
LL
---
Table 45 - Receive Signal Status Word
Long Loop. This bit is one when the line signal has an amplitude so
attenuated as to require substantial equalization for data recovery.
Medium Loop. This bit is one when the line signal has an amplitude so
attenuated as to require some equalization for data recovery.
Short Loop. This bit is one when the line signal has an amplitude with
minimal attenuation.
LIU Loss of Signal Indication. This bit will be one when the received
signal amplitude is more than 20 dB below the nominal value for a period
of at least 1 msec. This bit will be zero for normal operation.
Unused
Table 46 - Alarm Status Word One
(Page 03H, Address 18H)
Zarlink Semiconductor Inc.
(Page 03H, Address 19H)
MT9075B
Functional Description
61
Functional Description
Data Sheet