10705A Single Beam L - HP 5501A Operating And Service Manual

The 9800 series calculator serves a s a system controller (Figure 3-2). The reference and mea-
surement signals from the laser head and receivers are compared continuously by the 10760A
counters. These signals are approximately 2 MHz and are driven by line drivers to ensure
noise immunity. Upon command from the calculator, the accumulated counts for each mea-
surement axis can be sampled independently or simultaneously. Pulses are generated and
accumulated in the counters only when movement has occurred. Refer to Table 3-7 for typical
system specifications.
The 10755A compensation interface is used with either the 10756A manual compensator or the
5510A Opt 010 automatic compensator. In typical installations the choice of manual or automatic
compensation
is
determined by the stability of the ambient environment.
The 10783A numeric displays can be used to display the relative movement on each axis. The
displays are interfaced to the 9800 series calculator via the HP-IB and receive and display informa-
tion only on calculator command. (Refer to the individual unit theory of operation for addi-
tional information.)
Table
3
Typical
HP-IS
lnterface Electronics System Specifications
Number of Measu
figuration restrictions.
Measurement Resdution/Mwimum Allowable Velocity:
The measurement reso-
lution and velocity depend on the type of interferometer
used.
107024
Linear lnterferometer
10705A
Single Beam lnterferometer
Resolutjon h/4 A/24
Maximum Velocity
q 1 2 ) 30.q1.2) 51(2)
mm/sec (in/sec)
10706A
Plane Mirror lnterferometer
3.5
Computer lnterface Electronics
The Computer lnterface Electronics for the Laser Transducer System is designed to interface
a wide variety of digital processors. The individual components are selected and assembled
by the user for a specific measurement application.
The following discussion subdivides the Computer lnterface Electronics into two typicai
types of systems; a 10760A Counter-based system and a 10762A Comparator-based system
(closed-loop).