MT9044
Description
Input Controls
LOS2
1
X
X
0
0
1
LOS1
1
0
0
1
1
1
GTi
X
0
1
0
1
X
RST
0 to 1
1
1
1
1
1
Freerun
S0
-
S1
S1
S1
S2
-
Normal
(PRI)
S1
S0
-
-
S1H
S2 MTIE
S1H
State
Normal
(SEC)
S2
S0
S1 MTIE
S1 MTIE
-
-
S2H
Advance Information
Holdover
(PRI)
S1H
S0
S1
S1 MTIE
-
S2 MTIE
-
Holdover
(SEC)
S2H
S0
S1 MTIE
S1 MTIE
S2 MTIE
S2 MTIE
-
Legend:
-
No Change
MTIE
State change occurs with TIE Corrector Circuit
Refer to Automatic Control State Diagram for state changes to and from Auto-Holdover State
Table 5 - Automatic Control (MS1=MS2=1, RSEL=0) State Table
(11X)
(11X) RST=1
Reset
(X0X)
S0
Freerun
(01X)
(X0X)
(X0X)
S1
Normal
Primary
(X0X)
{A}
S1A
Auto-Holdover
Primary
(01X)
(01X)
(01X)
S2A
Auto-Holdover
Secondary
{A}
S2
Normal
Secondary
(X0X)
(011)
(010 or 11X)
(X00)
(X01)
S1H
Holdover
Primary
S2H
Holdover
Secondary
(11X)
(X0X)
(011)
(01X)
(010 or 11X)
NOTES:
(XXX)
{A}
LOS2 LOS1 GTi
Invalid Reference Signal
(11X)
Phase Re-Alignment
Phase Continuity Maintained (without TIE Corrector Circuit)
Phase Continuity Maintained (with TIE Corrector Circuit)
Movement to Normal State from any
state requires a valid input signal
Figure 8 - Automatic Control State Diagram
12
MITEL [ MITEL NETWORKS CORPORATION ]
