User`s guide

Universal Library User's Guide Analog Input Boards - USB-1408 Series
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USB-1408 Series
The USB-1408FS supports the following UL and UL for .NET features.
Analog input
Analog input functions and methods supported
UL: cbAIn(), cbAInScan(), cbALoadQueue(), cbFileAInScan(), cbATrig()
UL for .NET: AIn(), AInScan(), ALoadQueue(), FileAInScan(), ATrig()
Analog input argument values
Options BACKGROUND, BLOCKIO*, CONTINUOUS, EXTCLOCK, EXTTRIGGER, NOCALIBRATEDATA,
RETRIGMODE**, and SINGLEIO
* USB-1408 Series packet size based on Options settings are as follows:
Device
Options setting
Packet size
USB-1408FS
BLOCKIO
31
SINGLEIO
1
** RETRIGMODE can only be used with cbAInScan()/AInScan().
HighChan 0 to 7 in single-ended mode
0 to 3 in differential mode
Count In CONTINUOUS mode, Count must be an integer multiple of the packet size.
Rate 48 kHz maximum for BLOCKIO mode. The throughput is system dependent. Most
systems will be able to achieve 40 kHz aggregate. Best results are obtained when
using Windows XP or Windows Vista. When using cbAInScan() or AInScan() the
minimum sample rate is 1 Hz.
Range Single-ended mode:
BIP10VOLTS (± 10 V)
Differential mode:
BIP20VOLTS (± 20 V) BIP2PT5VOLTS (± 2.5 V)
BIP10VOLTS (± 10 V) BIP2VOLTS (± 2 V)
BIP5VOLTS (± 5 V) BIP1PT25VOLTS (± 1.25 V)
BIP4VOLTS (± 4 V) BIP1VOLTS (± 1 V)
Pacing Hardware pacing, internal clock supported.
External clock supported via the SYNC pin.
Triggering
Trigger functions and methods supported
UL: cbSetTrigger()
UL for .NET: SetTrigger()
Trigger argument values
TrigType TRIGPOSEDGE and TRIGNEGEDGE
External digital (TTL) hardware triggering supported. Use the Trig_In input for
the external trigger signal.