VT1433B User's Guide
Using the VT1433B
In the example above, Mainframe A contains the Slot 0 Controller for a multiple mainframe system. Mainframe A is connected to Mainframe B with a
Locate modules with logical addresses less than 128 in Mainframe A.
Locate modules with logical addresses greater than 127 in Mainframe B.
Locate the
Locate the last module in the module list specified in the call to hpe1432_init in Mainframe A.
Locate the module that generates the group synchronization pulse in Mainframe A.
Locate the channels performing channel triggering in Mainframe A.
Locate the module with the shared sample clock in Mainframe A.
If a groupID is not used with the call hpe1432_readRawData or
hpe1432_readFloat64Data, empty the VT1433Bs’ FIFOs in Mainframe B before Mainframe A. In other words, do not empty the FIFOs in Mainframe A unless the FIFOs in Mainframe B have been emptied. For more information about groupID see “Grouping of Channels/Modules” in this chapter.
If more than two mainframes are needed,
Phase Performance in Multiple Mainframe Measurements
Phase specifications are degraded by the delay that the
0.007 degree phase error at 256 Hz and an additional 0.55 degree phase error at 20 kHz.
Using a
The cable adds approximately 6 ns per meter of cable.
Each