270M
Rapid
Scanning Imaging Spectrograph
4.8 PDALOAD.EXE Driver:
The PDALOAD.EXE driver is installed with the QuikView software that is provided with
the QuikScan photodiode array detector. Please complete the QuikScan installation
and check out your 270M with QuikView before proceeding
to
programming with
PDALOAD.EXE.
To
avoid confusion, it is best
to
be sure that the interface and 270M
are functioning properly first, then proceed
to
test
and
debug your program. This
method of programming requires considerable programming skill, and is therefore not
recommended for the novice
or
occasional programmer. The documentation provided
in the PDALOAD.EXE driver section of the QuikView Manual is sufficient
to
get an
experienced programmer started writing controlling routines for the 270M.
4.9 Controlling the 270M with the Standard Spectrometer Interface:
This subsection details the functionality of the standard Spectrometer 1/0, for those
who wish
to
interface directly
to
the hardware using TTL logic. This discussion does
not apply
to
systems with optional 232
or
488 interfaces,
or
the DataScan controller.
The easiest way
to
confirm proper operation
of
this interface is
to
install the Graphical
Monochromator Interface (GMI) software and SPEX.SYS driver on a
DOS
PC.
Refer
to
the GMI instructions earlier
in
this section for further information.
The appendix on page 52 includes a pin function table for the Standard Spectrometer
1/0
{TTL) connector.
4.9.1 Interface Circuits
The Parallel
1/0
or
Interface Control Circuits consist of 3 input and 2 output buffers
(they are all uni-directional). The buffers are TTL compatible and the pinout is arranged
as
to
be consistent with the full line of SPEX Monochromators.
The input signals are terminated
in
the traditional 220
/330
ohm pull-up / pull-down
arrangement, the termination then feeds the input
of
a Schmidt Trigger (74 HCT14).
The output buffers are TTL 7 4 HC 9114 open collector drivers which should be
terminated at the receiving end in the same manor as the input signals are terminated.
Revised
November
24.
1992
13
Leica Microsystems, Inc.'s Ex. 1033
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