MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 87

• Manufacturer Part Number: MT9074AL
• Description: T1/E1/J1 Single Chip Transceiver
• Manufacturer: Zarlink Semiconductor, Inc.

Data Sheet
7 - 3 PD4 -
Bit
1-0
Bit
7
6
5
4
3
2
1
0
2
Table 110 - Jitter Attenuator Status Word
Table 109 - Receive Signal Status Word
Name
JACS Jitter Attenuated Clock Slow. If one it
JACF Jitter Attenuated Clock Fast. If one it
JAFC Jitter Attenuator Center Full. If one it
JAF4
JAE4 Jitter Attenuator FIFO with 4 Empty
Name
LLOS LIU Loss of Signal indication. This
JAE
JAF
- - -
PD0
- - -
(Page 3, Address 16H) (E1)
(Page 3, Address 17H) (E1)
indicates that the dejittered clock
period is increased by 1/16 UI. If zero
the clock is at normal speed.
indicates that the dejittered clock
period is decreased by 1/16 UI. If zero
the clock is at normal speed.
Jitter Attenuator FIFO Empty. If one it
indicates that the JA FIFO is empty.
Jitter Attenuator FIFO with 4 Full
Locations. If one it indicates that the
JA FIFO has at least 4 full locations.
indicates that the JA FIFO is at least
half full.
Locations. If one it indicates that the
JA FIFO has at most 4 empty locations.
Jitter Attenuator FIFO Full. If one it
indicates that the JA FIFO is full.
Unused.
Peak
These five bits indicate the level of the
received signal AMI pulses.
PD4
0
0
0
0
1
bit will be high if the received signal is
below the threshold selected by
ELOS (page 2, address 10H) for a
period of at least 1 msec. This bit will
be low for normal operation.
Unused
PD3
0
0
0
1
0
Functional Description
Functional Description
Detector
PD2 PD1 PD0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
Voltage
Line Attenuation
less than 4dB
3-8dB
8-14dB
14-20dB
more than 20dB
Levels.
4-0 RNU4-8 Receive National Use Four to
Bit
7
6
5
Table 111 - Receive Non-Frame Alignment
RNFAB Receive Non-frame Alignment Bit.
RALM
Name
RIU1
(Page 3, Address 18H) (E1)
Receive International Use 1. This
bit is received on the PCM30 2048
kbit/sec. link in bit position one of the
non-frame alignment signal. It is used
for CRC-4 multiframe alignment or
international use.
This bit is received on the PCM30
2048 kbit/sec. link in bit position two
of the non-frame alignment signal.
This bit should be one in order to
differentiate
alignment frames and non-frame
alignment frames.
Receive Alarm. This bit is received
on the PCM30 2048 kbit/sec. link in
bit position three (the A bit) of the
non-frame alignment signal. It is used
as a remote alarm indication (RAI)
from the far end of the PCM30 link (1
- alarm, 0 - normal).
Eight. These bits are received on the
PCM30 2048 kbit/sec. link in bit
positions four to eight (the Sa bits) of
the non-frame alignment signal.
Functional Description
Signal
between
MT9074
frame
87