Test Descriptions
3.8
ONLINE
DATA
TEST
This test section verifies
the
correct operation
of
the
ABI
to HP-IB logic (which consists
of
four HP-IB
transceivers
and
two
inverters).
It
is
assumed
at
this point
that
the
PIC
and
the
ABI
have been completely
tested offline,
so
that
all
that
remains to test
is
that
the
PIC can correctly communicate
with
other
HP-IB
devices over
the
standard HP-IB.
A second PIC
is
required to perform this test section. The second PIC
is
assumed to
be
functioning
correctly, although some diagnostics
are
performed on
it
to avoid catastrophic failures. The
two
PICs
are
connected together via HP-IB cables
with
no
other
HP-IB devices connected. Since some of
the
HP-IB
lines
can
only be asserted by
the
system controller,
it
is
necessary for
the
PICDIAG to
alternate
the
System
Controller
function
between
the
two PICs. This test
is
broken down
into
three
groups
so
that
failures can
be easily pinpointed.
Step 45. HP-IB
Data
and Control Test -
At
this point the PIC,
the
ABI,
and
all of the HP-IB drivers
have been tested. This test verifies
that
the HP-IB drivers work
at
high speed and tests the
pattern
sensitivity of HP-IB interface lines. Additionally,
it
performs a general data and
control test similar to the DMA exerciser program.
SEP 84
3-10
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