MT90401 Zarlink Semiconductor, MT90401 Datasheet - Page 20

• Manufacturer Part Number: MT90401
• Description: Sonet/sdh System Synchronizer
• Manufacturer: Zarlink Semiconductor

Using the above method, the jitter attenuation can be calculated for all combinations of inputs and outputs based on
the four jitter transfer functions provided.
Since intrinsic jitter generation is always present, jitter attenuation will appear to be lower for small input jitter
signals than for large ones. Consequently, accurate jitter transfer function measurements are usually made with
large input jitter signals (e.g., 75% of the specified maximum jitter tolerance).
Legend:
-
/
MTIE
Refer to Control State Diagram for state changes to and from Auto-Holdover State
MS2
0
0
0
0
0
1
State change occurs with TIE Corrector Circuit
Not Valid
No Change
MS1
Input Controls
0
0
0
1
1
0
Description
RSEL
X
0
0
1
0
1
PCCi
OutputT1
OutputT1
OutputE1
X
X
X
X
0
1
OutputE1
Table 4 - Control State Table
Freerun
=
=
=
=
S0
S1
S1
S2
Zarlink Semiconductor Inc.
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/
/
InputT1
20
OutputT1
OutputT1
MT90401
10


–
-------- -
20
18
20
10
S2 MTIE
Normal


(PRI)


S1H
S2H
--------------------- -
S1
S0
–
------
=
20
-------------------
1UIT1
1UIE1
-
-
A
644ns
488ns


2.5UI T1
=
3.3UI T1
S1 MTIE
S1 MTIE
Normal
(SEC)
S2H
S2
S0
State
-
/
Holdover
S1 MTIE
S2 MTIE
(PRI)
S1H
S1
S0
/
Data Sheet
Holdover
S1 MTIE
S1 MTIE
S2 MTIE
(SEC)
S2H
S0
-
/