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•
Using the DAS-1700 Series with DriverLINX
Keithley DAS-1700 Series
How to set up the DAS-1700 Series for gated analog output.
Digital Start Events contain mask, pattern, and match fields. The mask selects which
bit in the Logical Channel to use as a gate input. The pattern selects whether the gate
is active, or enables data-acquisition, when the gate signal is high or low.
•
Specify the Channel as
2
. For hardware-independence, you can specify
the hardware external trigger channel by the symbolic constant,
DI_EXTTRG.
•
Users should connect the external trigger signal to the TGIN line.
•
Specify the Mask property as
1
, or
Bit 0
, to identify the gate input bit
of the Logical Channel.
•
Specify the Match property as
Equals
.
•
Specify the Pattern property as
0
for a low-level active gate or
1
for a
high-level active gate.
•
Specify the Delay property as 0. DriverLINX does not use a delay with
gating.
Digital Start Event (Retriggering)
In recycle mode, a DAS-1700AO continuously writes analog output samples from its
FIFO buffer. A digital trigger can restart the output at the beginning of the FIFO
buffer. Use retriggering when you want to repeatedly synchronize the start of a
waveform output with an external signal.
To use recycle mode, the device configuration must enable it and the task must meet
certain conditions. See “Special…” on page 15 for more information.
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