Modify the Clock Routing configuration file to define the reference clock routing between chassis in systems that use more than one chassis.

Find the file at <Program Files>\National Instruments\NI ICsc\Support\ClockRouting.ini.

Note Ensure that ClockRouting.ini reflects the external cabling for reference clocks and triggers performed in Cabling for System Use.

[Chassis:X] Section

Use [Chassis:X] sections to specify the timing module and clock routes for each chassis. [Chassis:X] section names are required and must be unique, for example: [Chassis:0]. Create a [Chassis:X] section for each chassis in your system.

Table 35. [Chassis:X]
Key Value Required?
TimingCardName NI MAX alias for the synchronization module in the chassis Required
ClockRoutes Comma-separated routes formatted as <clock source terminal>:<clock destination terminal>. Terminal names are dictated by NI-Sync. Refer to Defining NI-Sync Clock Terminals in the NI-Sync User Manual for more information. Required

Example: 

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

[Chassis:1] 
TimingCardName = 6674T_01 
ClockRoutes = ClkIn:PXI_Clk10_In
Note By default, the example connections are all commented out with a semicolon (;). Remove the semicolons to uncomment the lines in the configuration file.
Note If the routing connections specified in the configuration files are valid, the ICsc window displays Clock routes connected when started. If routes are not valid, it displays an error message. The ICsc application only reads this configuration file when the application first launches. If changes are made to this file, the ICsc application must be restarted.