ADLINK PXI-9527 - Manual (Page 42)

32 Operations
connected bus provided by PXI Trigger Bus, multiple modules
are easily synched. When configured as input, the PXI-9527
serves as a slave module and can accept trigger signals from
one of buses 0 through 7. When configured as output, the PXI-
9527 serves as a master module and can output trigger signals
to the PXI Trigger Bus Numbers 0 through 7.
Analog Trigger
The PXI-9527 analog trigger circuitry can be configured to
monitor one analog input channel from which data is acquired.
Selection of an analog input channel as the analog trigger
channel does not influence the input channel acquisition opera-
tion. The analog trigger circuit generates an internal digital trig-
ger signal based on the condition between the analog signal
and the defined trigger level.
Analog trigger conditions are as follows:
Z Positive-slope trigger: The trigger event occurs when the
analog input signal changes from a voltage lower than
the specified trigger level to a voltage exceeding the
specified trigger level.
Z
Negative-slope trigger: The trigger event occurs when
the analog input signal changes from a voltage exceed-
ing the specified trigger level to a voltage lower than the
specified trigger level.
Figure 3-6: Analog Trigger Conditions