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Universal Library User's Guide
Pacing
Analog Input Boards - USB-1208 Series
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
USB-1208LS
TRIGHIGH and TRIGLOW
USB-1208FS
TRIGPOSEDGE and TRIGNEGEDGE
Both products support external digital (TTL) hardware triggering. Use the Trig_In
input for the external trigger signal.
Analog output
Analog output functions and methods supported
UL:
cbAOut(), cbAOutScan()
UL for .NET:
AOut(), AOutScan()
Analog output argument values
Options
USB-1208LS
Ignored
USB-1208FS
BACKGROUND, CONTINUOUS
For the USB-1208FS, the number of samples (Count) in a CONTINUOUS scan needs
to be an integer multiple of the packet size (32).
HighChan
0 to 1
Count
USB-1208LS
(HighChan – LowChan) + 1
USB-1208FS
Count must be an integer multiple of the number of channels in the scan. In a
CONTINUOUS scan, Count must be an integer multiple of the packet size (32).
Rate
USB-1208LS
Ignored
USB-1208FS
Up to 10 kHz maximum for a single channel
Up to 5 kHz maximum for two channels
Performance varies when operating on systems other than Windows XP or
Windows Vista.
Range
USB-1208LS
Ignored - Not programmable; fixedat UNI5VOLTS (0 to 5 V)
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