User`s guide

Universal Library User's Guide Analog Input Boards - PCI-DAS64/Mx/16 Series
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Hardware considerations
Pacing analog input
 Hardware pacing, external or internal clock supported.
 The clock edge used to trigger acquisition for the external pacer may be rising or falling and is selectable
using InstaCal.
 The packet size is 512 samples.
Analog Input configuration
The analog input mode may be 32 channel differential or 64 channel single-ended and may be selected using
InstaCal.
Analog Input options
Except for SINGLEIO transfers, CONTINUOUS mode scans require enough memory for half FIFO of memory.
Triggering and gating
Digital (TTL) hardware triggering supported. Use the A/D Start Trigger Input (pin 55) for triggering and
gating with cbAInScan() and cbFileAInScan() / AInScan() and FileAInScan(). Use the A/D Stop Trigger
Input (pin 54) for cbAPretrig() and cbFilePretrig() / APretrig() and FilePretrig().
Analog hardware triggering and gating are supported. cbSetTrigger() / SetTrigger() are supported for
TRIGABOVE, TRIGBELOW, GATENEGHYS, GATEPOSHYS, GATEABOVE, GATEBELOW, GATEINWINDOW, GATEOUTWINDOW.
Use the Analog Trigger Input (pin 56) for analog triggering. Analog thresholds are set relative to the ±5 V
range. For example: a threshold of 0 equates to -5 V, and a threshold of 65535 equates to +4.999847 V.
When using analog trigger feature, one or both of the DACs are used to set the threshold and are unavailable
for other functions. If the trigger function requires a single reference (GATEABOVE, GATEBELOW, TRIGABOVE,
TRIGBELOW) then DAC0 is available. If the trigger function requires two references (GATEINWINDOW, GATE
OUTWINDOW, GATENEGHYS, GATEPOSHYS) then neither DAC is available for other functions.
Caution! Gating should NOT be used with BURSTMODE scans.
Pacing analog output
 Hardware pacing, external or internal clock supported.
 The clock edge used to trigger analog output updates for the external pacer may be rising or falling and is
selectable using InstaCal.
 EventData for ON_PRETRIGGER events may not be accurate. In general, this value will be below the actual
number of pretrigger samples available in the buffer.
These boards support concurrent analog input and output scans. That is, these boards allow for operations of
analog input functions and methods (cbAInScan() and cbAPretrig() / AInScan() and APretrig()) and
analog output functions and methods (cbAOutScan() / AOutScan()) to overlap without having to call
cbStopBackground() between the start of input and output scans.
Output pin 59 configuration
Pin 59 may be configured as the DAC Pacer Output, SSH Output with hold configured as high level, or
SSH Output with hold configured as low level. These options are selected via InstaCal