參數(shù)資料
型號(hào)： 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(yè)數(shù)： 13/28頁(yè)
文件大小： 126K
代理商： MT9042C
MT9042C
13
MT9042C and Network Specifications
The
requirements (intrinsic jitter, jitter tolerance, jitter
transfer, frequency accuracy, holdover accuracy,
capture range, phase change slope and MTIE during
reference
rearrangement)
specifications.
MT9042C
fully
meets
all
applicable
PLL
for
the
following
1.
Stratum 3, Stratum 4 Enhanced and Stratum 4
AT&T
TR62411
(DS1)
December
1990
for
2. ANSI T1.101 (DS1) February 1994 for
Stratum 3, Stratum 4 Enhanced and Stratum 4
3. ETSI 300 011 (E1) April 1992 for
Single Access and Multi Access
4. TBR 4 November 1995
5. TBR 12 December 1993
6. TBR 13 January 1996
7. ITU-T I.431 March 1993
Applications
This section contains MT9042C application specific
details for clock and crystal operation, guard time
usage, reset operation, power supply decoupling,
Manual Control operation and Automatic Control
operation.
Master Clock
The MT9042C can use either a clock or crystal as
the master timing source.
In Freerun Mode, the frequency tolerance at the
clock outputs is identical to the frequency tolerance
of the source at the OSCi pin. For applications not
requiring an accurate Freerun Mode, tolerance of the
master timing source may be
±
100ppm.
applications requiring an accurate Freerun Mode,
such as AT&T TR62411, the tolerance of the master
timing source must Be no greater than
±
32ppm.
For
Another consideration in determining the accuracy of
the master timing source is the desired capture
range. The sum of the accuracy of the master timing
source and the capture range of the MT9042C will
always equal
±
230ppm. For example, if the master
timing source is
±
100ppm, then the capture range
will be
±
130ppm.
Clock Oscillator
- when selecting a Clock Oscillator,
numerous parameters must be considered.
includes absolute frequency, frequency change over
temperature, output rise and fall times, output levels
and duty cycle. See AC Electrical Characteristics.
This
Figure 9 - Clock Oscillator Circuit
For applications requiring
±
32ppm clock
the following clock oscillator module may be used.
accuracy,
+5V
20MHz OUT
GND
0.1uF
+5V
OSCo
MT9042C
OSCi
No Connection
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