Modify the ICsc clock routing configuration file, ClockRouting.ini, to define the reference clock routing between chassis in systems that use more than one chassis.

The ICsc clock routing configuration file is required when PXIe chassis 10 MHz clocks are shared between the PXIe-6674T CLK IN and CLK OUT terminals.

  • File—ClockRouting.ini
  • Location—<Program Files>\National Instruments\NI ICsc\Support

    • [Chassis:X] Section

    Use [Chassis:X] sections to configure the timing module and clock routes. You must include one section for each chassis containing a PXIe-6674T module.

    Note Section names of the configuration file are arbitrary. Section names are required and must be unique. NI recommends naming the sections according to the names of the chassis that appear in NI Hardware Configuration Utility, for example: [Chassis:0]. Create a new [Chassis:X] section for each chassis in your system.
    Table 13. [Chassis<Value>] Key Value Pairs
    Key Value Default Value Required?
    TimingCardName The timing module device name, as configured in Hardware Configuration Utility. — Required
    ClockRoutes Specifies one or more clock routes. The clock source terminal and clock destination terminal (separated by a colon). — Required
    Note Clock routes are defined by NI-Sync. Refer to Defining NI-Sync Clock Terminals in the NI-Sync User Manual for information.

    Example: 

    Chassis:0] 
TimingCardName = 6674T_00 
ClockRoutes = Oscillator:ClkOut,ClkIn:PXI_Clk10_In 

[Chassis:1] 
TimingCardName = 6674T_01 
ClockRoutes = ClkIn:PXI_Clk10_In