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參數(shù)資料
| 型號： | MT9042C |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Multitrunk System Synchronizer(多中繼系統(tǒng)同步裝置) |
| 中文描述： | Multitrunk系統(tǒng)同步器（多中繼系統(tǒng)同步裝置） |
| 文件頁數(shù)： | 15/28頁 |
| 文件大?。?/td> | 126K |
| 代理商： | MT9042C |
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MT9042C
15
In cases where fast toggling might be expected of
the LOS1 input, then an unsymmetrical Guard Time
Circuit is recommended. This ensures that reference
switching doesn’t occur until the full guard time value
has expired. An unsymmetrical Guard Time Circuit
is shown in Figure 12.
Figure 13 - Unsymmetrical Guard Time
Circuit
Figure 13 shows a typical timing example of an
unsymmetrical
Guard
Time
MT9042C in Automatic Control.
Circuit
with
the
TIE Correction (using GTi)
When Primary Holdover Mode is entered for short
time periods, TIE correction should not be enabled.
This will prevent unwanted accumulated phase
change between the input and output. This is mainly
applicable
to
Manual
Control,
Control
together
with
the
inherently operate in this manner.
since
Automatic
Time
Guard
Circuit
For instance, 10 Normal to Holdover to Normal mode
change sequences occur, and in each case Holdover
was entered for 2s. Each mode change sequence
could account for a phase change as large as 350ns.
Thus, the accumulated phase change could be as
large as 3.5us, and, the overall MTIE could be as
large as 3.5us.
Phasehold
Phasestate
Phase
10
0.05ppm is the accuracy of Holdover Mode
50ns is the maximum phase continuity of the
MT9042C from Normal Mode to Holdover Mode
200ns is the maximum phase continuity of the
MT9042C from Holdover Mode to Normal Mode (with
or without TIE Corrector Circuit)
R
P
1k
GTi
C
10uF
R
C
150k
MT9042C
GTo
+
R
D
1k
0.05
ppm
2
s
×
100
ns
=
=
50
ns
200
ns
250
ns
=
+
=
10
250
ns
100
ns
+
(
)
×
3.5
us
=
=
Figure 12 - Automatic Control, Unsymmetrical Guard Time Circuit Timing Example
PRI
NORMAL
SEC
NORMAL
PRI
HOLDOVER
PRI
NORMAL
LOS2
GOOD
PRI
SIGNAL
STATUS
SEC
SIGNAL
STATUS
LOS1
PRI
NORMAL
PRI
HOLDOVER
BAD
GOOD
BAD
GOOD
GOOD
GTo
GTi
MT9042C
STATE
V
SIH
NOTES:
1. T
D
represents the time delay from when the reference goes
bad to when the MT9042C is provided with a LOS indication.
T
D
T
D
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT9042CP | 制造商:Microsemi Corporation 功能描述: 制造商:Mitel Networks Corporation 功能描述: |
| MT9042CP1 | 制造商:Microsemi Corporation 功能描述:SYNCHRONIZER 28PLCC - Rail/Tube 制造商:Microsemi Corporation 功能描述:PB FREE MULTITRUNK SYSTEM SYNCHRONIZER 制造商:Zarlink Semiconductor Inc 功能描述:SYNCHRONIZER 28PLCC - Rail/Tube 制造商:Zarlink Semiconductor Inc 功能描述:PB FREE MULTITRUNK SYSTEM SYNCHRONIZER |
| MT9042CPR1 | 制造商:Microsemi Corporation 功能描述:SYNCHRONIZER 28PLCC - Tape and Reel 制造商:Zarlink Semiconductor Inc 功能描述:SYNCHRONIZER 28PLCC - Tape and Reel |
| MT9043 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:T1/E1 System Synchronizer |
| MT9043AN | 制造商:Microsemi Corporation 功能描述: |
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