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h.
Read into Calculator
X-axis data stored in Calculator.
i.
Subtract 160 from X-axis data; multiply by
Calculates compensated measurement value
compensation data and constant for inches
in inches.
conversion (6.23023 X 10-6)
j.
Output on HP-IB to 10783A Display
k.
Repeat f through j for Y-Axis
I.
Repeat f through j for Z-AXES
Displays X-axis measurement.
Displays Y-Axis measurement.
Displays Z-Axis measurement.
m. Go to b to repeat cycle.
4.5
General Coupler Interface Description
4.6 COUPLER BUS STRUCTURE. The 10740A Coupler backplane consists of 86 lines (refer
to Table 4-7). Some of these lines are tied together for special functions (for example lines
37-40 and 47-50 are all tied together and used a s +5volt return). Each of these lines has adedicated
function and any card which requires that function uses that line (refer to 10740A theory of
operation in Section Ill). For this reason, any given card can beconnected to any oneof the back-
plane connectors.
The structure can be divided into three parts; data related lines, instruction related lines, and
power lines.
The data lines consist of 28 lines for binary magnitude, 4 decimal point lines, 4 error lines, one
special line for indicating A/4 or A/8 mode, and a special line for indicating a special function
labeled "system nulled" which i s used' with the comparator-based systems.
The
instruction
lines
consist
of
4
command
lines,
4
card
address
lines,
2
lines
used
a s
instruction
valid
(INSV),
2
lines
used
a s
data
valid
(DAV),
and
2
lines
used
a s
operation
complete
(OPC),
one
line
for
system
reset,
and
one
line for
the
synchronous
sample
command.
The power lines consist of 2 lines of +15V, 2 lines for -15V, 2 lines for f15V return, 6 lines for
+5 volts, and 8 lines for $5 volt return.
4.7
BUS LANGUAGE. The basic transducer language consists of instructions. Each 8-bit
instruction is composed of a 4-bit address and a 4-bit command. The execution of an instruction
represents an operation. (Tables
4-2
through 4-71 lists the instructions for each card.)
There are two possible sequences that may occur a s a result of an instruction depending on
whether or not the instruction requested data to be transferred on the backplane. I n general the
sequence will be:
1 .
An instruction is placed on the command and address lines.
2.
INSV goes low to indicate the instruction is valid.
3.
Each card looks at the instruction to determine if it i s involved.
a.
If it is not involved, go to step 8.
b.
If it is involved, continue.
4.
The instruction i s interpreted and the indicated operation begun.
a.
If no data transfer is required, go to step 8.
b.
If data is transferred, continue.
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Troubleshooting
