User`s guide

Universal Library User's Guide Analog Input Boards - PCI- and CIO-DAS6402 and DAS3202 Series

Trigger argument values

TrigType TRIGPOSEDGE, TRIGNEGEDGE, GATEHIGH, GATELOW

For PCI- versions, the following additional argument values are also valid:

TRIGABOVE, TRIGBELOW, GATENEGHYS, GATEPOSHYS, GATEABOVE, GATEBELOW,

GATEINWINDOW, GATEOUTWINDOW

Threshold 0 to 4095

For /16 versions the following argument values are also valid:

0 to 65535 (Refer to "16-bit values using a signed integer data type" on page 16 for

information on 16-bit values using unsigned integers).

Event notification

Event notification functions and methods supported (PCI versions Only)

UL: cbEnableEvent(), cbDisableEvent()

UL for .NET: EnableEvent(), DisableEvent()

Event notification argument values

EventType ON_SCAN_ERROR, ON_PRETRIGGER, ON_DATA_AVAILABLE, ON_END_OF_AI_SCAN,

ON_END_OF_AO_SCAN

Hardware considerations

Pacing Analog input

Hardware pacing, external or internal clock supported. The packet size is 512 samples for both CIO versions

and for PCI versions.

Triggering and gating

Digital (TTL) hardware triggering supported. The PCI version also supports analog hardware triggering.

Analog thresholds are set relative to the ±10 V range. For example, a threshold of 0 equates to -10 V and a

threshold of 65535 equates to +9.999695 V.

When using the UL functions cbAPretrig() or cbFilePretrig() (or the UL for .NET methods APretrig()

or FilePretrig()) on the PCI-DAS6402/16 or PCI-DAS3202/16, use the A/D Stop Trigger In (pin 47) input

to supply the trigger.

When using both EXTCLOCK and BURSTMODE on the PCI-DAS6402/16 or PCI-DAS3202/16, use the A/D Start

Trigger In (pin 45) input to supply the clock and not the A/D External Pacer (pin 42). Since BURSTMODE is

actually paced by the internal burst clock, specifying EXTCLOCK when using BURSTMODE is equivalent to

specifying EXTTRIGGER.

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.

Gain queue

When using the UL function cbALoadQueue() or the UL for .NET method ALoadQueue() with the PCI

version, up to 8k elements can be loaded into the queue.

Pacing analog output

CIO Version: Software only