10
Installing the TE3000
Clock Interface Configuration 1
The most reliable auxiliary data channel
clock source configuration requires the DTE to provide a clock (TT) synchronous
with the data (SD) to the TE3000. This scenario allows the TE3000 to latch the
data using a clock that has traveled the same path as the data, which ensures that
both the clock and the data are received in phase at the TE3000.
The following block diagram shows the clock configuration for a DTE configured
to turn around the ST clock source, and a TE3000 auxiliary data channel
configured for an external clock source.
Notice in the illustration that the switch for the TE3000 auxiliary data channel
clock source is configured for external even though the TE3000 is providing ST to
the DTE.
In this configuration, the TE3000 provides clock (ST) to the DTE. The switch for
the DTE clock source is configured to accept the external clock (ST) provided by
the TE3000. The DTE uses the ST to time the data, sends the data to the TE3000
on SD, and returns the ST to the TE3000 on TT. The TE3000 uses TT to latch the
data.
The TE3000 auxiliary data channel must be configured for an external clock
source to accept TT from the DTE.
Clock Interface Configuration 2
If the DTE cannot turn around the ST, but
has an internal clock source that can be provided as TT to the TE3000, use this
option to configure the auxiliary data channel.
The following block diagram shows the clock configuration for a DTE providing
an internal clock source as TT to the TE3000.
In this configuration, the DTE clock is set to internal and the TE3000 auxiliary
data channel clock source is set to external. The DTE uses its internal clock source
to time the data, sends the data to the TE3000 on SD, and sends its internal clock
to the TE3000 as TT. The TE3000 uses TT to latch the data. The TE3000 auxiliary
data channel must be configured for an external clock source.
DTE
Data SD
Clock TT
Internal Clock
Switch
Clock ST
ST
Ext
Source
Int
Source
TE3000
Internal Clock
ST
TT
ST
SD
Latching Data
To TTM
Ext
Source
Int
Source
Switch
Timing Data
ST
Data
TE3000
DTE
Data SD
Clock TT
Clock ST
Internal Clock
Int
Source
Internal Clock
ST
TT
ST
SD
Latching Data
To TTM
Ext
Source
Int
Source
Switch
Timing Data
Data
Summary of Contents for TE3000
Page 10: ...viii Preface ...
Page 14: ...4 TE3000 Overview ...
Page 52: ...42 Using the Front Panel ...
Page 94: ...84 Maintenance and Software Upgrades ...
Page 96: ...86 Technical Specifications ...
Page 102: ...92 TE3000 PID Assignments ...
Page 112: ...102 Glossary ...