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C-10
DriverLINX Configuration Notes
External Clocking
Specify external clocking using a Rate Timing Event on channel 0 with an
external clock source specified. For hardware-independence, you can
specify the hardware external clock channel by the symbolic constant,
DI_EXTCLK
. Connect the external clock source to
XPCLK
[44]. The
hardware external clocking feature of the DAS-1800 supports positive or
negative active edge clocking. Note that the DAS-1800HC models use
DI
0/XPCLK
for both external clocking and digital input. BE SURE that
external clock source is TTL compatible, 0V minimum to +5V
maximum!
External Triggering
Specify external triggering using a Digital Start Event reading from the
4-bit digital input port (channel 0) or external trigger input (channel 2).
For hardware-independence, you can specify the hardware external
trigger channel by the symbolic constant,
DI_EXTTRG
. Digital Start
Events contain
mask
,
pattern
, and
match
fields. The mask is logically
AND with the digital input data on the Logical Channel and then
compared against the
pattern
for a match/mismatch. DriverLINX will use
hardware triggering if the Digital Start Event corresponds to a positive or
negative edge at trigger input,
DI 1/TGIN
[B40] for DAS-1800HC and
TGIN
[46] for other DAS-1800 models.
External Gating
DriverLINX implements external gates using a Timing Event with the
Generator Gated by the
TGIN
[46] input. Acquisition is active while the
TGIN
input is at TTL high. Use
DI 1/TGIN
[B40] for DAS-1800HC and
TGIN
[46] for other DAS-1800 models.
Simultaneous Sampling
The DAS-1800 hardware and DriverLINX support simultaneous
sampling through the SSH-8 accessory. Specify the A/D channels
connected to the SSH-8 and the SSH-8 amplifier gain values in the
Configure DAS-1800 Options
dialog box. See “Special Device Settings”
on page C-4.
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