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Module Description
VXI backplane connections
Trigger Lines
The VXI specification provides 8 TTL and 2 ECL trigger lines that can be used for module-
specific signaling. When programmed in a multi-input configuration, the E1439 uses the ECL
trigger lines, designating ECLTRG0 as the SYNC line and ECLTRG1 as the 10 MHz Reference
Clock (CLOCK). These lines can be extended to other mainframes using the SMB connectors on
the front panel. The SMB connectors can also be used for intermodule synchronization within a
mainframe, leaving the ECL trigger lines free for other purposes.
The CLOCK line is the master reference clock for a synchronous system of multiple E1439
modules. Only one E1439 module in each mainframe is allowed to drive this line.
The SYNC line is used to send timing signals among E1439 modules in a multi-input system. Any
module that drives this line must do so synchronously with CLOCK so that transitions on SYNC
do not occur near the rising edge of CLOCK. This ensures that all modules with a synchronous
state machine clocked on CLOCK interprets SYNC in a consistent manner for each cycle of the
state machine. SYNC is used for synchronizing, arming, and triggering signals between E1439
modules. The interpretation of the SYNC line is dependent on the states of the module described
in
“The measurement loop” on page 23
. The E1439 module is also capable of controlling the
SYNC line synchronously via the control register.
For more information on multi-module operation see
“Managing multiple modules” on page 32
.
Содержание E1439
Страница 6: ...6...
Страница 10: ...10 Contents...
Страница 11: ...1 1 Installing the Agilent E1439...
Страница 18: ...8 Installing the Agilent E1439 To transport the module...
Страница 19: ...2 2 Getting Started with the Agilent E1439...
Страница 28: ...18 Getting Started with the Agilent E1439 To use the example programs...
Страница 29: ...3 3 Using the Agilent E1439...
Страница 63: ...4 4 Agilent E1439 Programmer s Reference...
Страница 217: ...5 5 Module Description...
Страница 228: ...218 Module Description Block diagram and description...
Страница 229: ...6 6 Replacing Assemblies...
Страница 234: ...224 Replacing Assemblies Replaceable parts To remove the top cover...
Страница 235: ...225 Replacing Assemblies Replaceable parts To remove the M1 M2 assemblies...
Страница 236: ...226 Replacing Assemblies Replaceable parts...
Страница 238: ...228...
Страница 244: ...Index 234...