Agilent Technologies 1670E Series, User Manual

Page: 184 / 650

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Using the Pattern Generator
Building Test Vectors and Macros
Break. The Break instruction causes a break at the current vector. In
single run mode, this instruction halts the sequence and holds the
outputs at the break vector’s value. In repetitive run mode, this
instruction pauses the sequence at the current vector momentarily,
then continues.
NOTE: When operating at 200 MHz you can not have 2 Break events in succession.
This also includes the Wait event.
Signal IMB. The Signal IMB instruction creates a signal for the IMB
bus of the HP 1660EP-series at the current vector, allowing the pattern
generator to trigger the state or timing analyzers. Multiple signal IMB
instructions may be placed in the sequence, but only the first signal
IMB will be executed.
Wait Event. The Wait Event instruction halts the execution of the
program sequence until the event is received by the hardware.
Selecting this instruction brings up a pop-up menu that lets you set
four data patterns and select one of them or an IMB signal as the event
the pattern generator is waiting for.
An external wait event is the ORing of the three input lines on the clock
pod. The first wait IMB is the only one recognized because IMB does
not allow pulsing.
NOTE:
When operating at 200 MHz you can not have 2 Wait events in succession. This
also includes the Break event.
If Event. The If Event instruction is only available in Full Channel 100
Mbit/s mode with clock frequencies of 50 MHz and lower. Only one If
Event is allowed in a sequence program. If a new if instruction is placed
in a program sequence, a message will appear stating that only one if
instruction is allowed. To add a new if instruction, the old one must be
deleted.