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Model T940 User Manual
Publication No. 980938 Rev. K
Soft Front Panel Operation 5-100
Astronics Test Systems
Figure 5-57: Sequence Step Data Panel
Internal T0CLK
This control allows the user to specify the Internal T0CLK period.
When the system clock source is set to internal T0CLK, this control specifies the
system clock period. The period is programmed in master clock edges (rising
and falling), i.e., 1/2 the master clock period.
For example, if the master clock is set to 500 MHz, then a setting of 20 would
result in a system clock period of 20 ns.
20 * (1/2 (2 ns)) = 20 ns.
With a master clock of 100 MHz the system clock period would be 100ns.
20 * (1/2 (10 ns)) = 100 ns.
The valid values for T0CLK are from 20 to 65550.
The relevant VXI
plug&play
API function is:
•
tat964_setSequenceClock
Clocks per Pattern
This numeric control defines the Clocks per Pattern (CPP) for each sequence
step.
The CPP value determines the number of System Clocks that will be generated
for each Pattern Clock. When CPP = 1, then Pattern Clock is equal to System
Clock. When CPP = 2, then Pattern Clock is two times the System Clock.