HP 5501A Operating And Service Manual page 91

section
Svstem
3.1 INTRODUCTION
This section contains the theory of operation of the Laser Transducer System electronics and
of the individual units that make up the different systems. The optics are common to all sys-
tems and are covered in Section 1 1 .
The output electronics for the 5501A Laser Transducer System are available in a wide variety of
configurations. General-purpose interface electronics include a universal binary interface for
virtually any digital processor or controller; an HP-IB interface based on the Hewlett-Packard
Interface Bus (HP-IB) and HP programmable calculators; and a universal English/Metric pulse
output for most numerical controllers. A very basic quarter-wave pulse output i s also available.
Other electronic modules provide for manual or automatic velocity-of-light compensation and
for the special needs of some closed-loop systems. The information i s organized a s follows:
a. Theory of operation of a simplified Laser Transducer System.
b.
A functional description of each type of system.
c. Theory of operation of the individual units that make up the different systems.
After reading the simplified theory of operation and the functional description of the type
system you have, read the theory of operation of the individual units that are contained in
your system. You will find this information very helpful in both programming and trouble-
shooting your system.