Table of Contents
Advertisement
5.12
INTERFACE ELECTRONICS CHECKOUT
Since the computer interface electronics are designed to interface a user selected system to a
wide variety of digital processors, it is impossible to give a specific checkout procedure. How-
ever,
a
recommended approach is presented for both the counter-based systems and the corn-
parator-based system.
5.13
HP-IB
and/or
Binary
Controlled
Counter-Based
System
Checkout
When checking out a counter-based system
it
i s necessary to program the system controller to
verify specific functions. An example of
a
typical program
i s
shown in Section IV, Table
4-72.
The example shows how to program the system using the 9825A and the HP-IB. Examples of
programming using the binary interface card are also shown. Once a system program is writ-
ten and loaded into the system controller, verify system operation by performing the following
steps:
a.
Verify that the two LED indicators on the lower front edge of each 10760A Counter
card are lit. These LED'S indicate that the reference and measurement signals from the
laser head and receivers are present.
b.
If the 10745A HP-IB Interface Card i s used, verify that the Talk and Listen lights on the
middle front edge of the card are alternately lit when the card i s addressed to talk and
listen by the system controller.
c.
If the 10746A Binary Interface Card is used, verify that the Data light on the upper
front edge of the card lights when an instruction is sent from the system controller to
transfer data. Note that this light is not lit when instructions (i.e., not data) are trans-
ferred from the system controller to the coupler backplane via the 10746A card.
NOTE
If
the
displayed
data
counts
down
from
160 to
0
and
then
indi-
cates
a
large
number
with
only
a
slight
movement
of
the
mea-
surement
optics,
change
the
position
of
the
NORMAL/REVERSE
jumper
on
the
10760A
Counter
card
(the
jumper
is
in
the
NORMAL
position
when
shipped).
Refer
to
the
10760A
unit
manual
for
additional
information
if
required.
d.
Displace the measurement optics in each axis a specific distance and verify that the
output devices accumulate the appropriate number of counts for the distance moved.
e.
Interrupt the laser beam in each axis and verify the system comes up with an error indi-
cation. Reset the system after each error indication.
f.
Replace the front panel of the 10740A Coupler
Advertisement
Table of Contents
Troubleshooting
