5520A
Operators Manual
5-4
5-1. Introduction
This chapter describes methods for operating the Calibrator by remote control. Remote
control can be interactive, with the user controlling each step from a terminal, or under
the control of a computer program running the Calibrator in an automated system. The
Calibrator rear panel has three ports for remote operations: IEEE-488 parallel port (also
known as a General Purpose Interface Bus, or GPIB port), and two RS-232 serial ports,
SERIAL 1 FROM HOST and SERIAL 2 TO UUT.
IEEE-488 The IEEE-488 parallel port is usually used in larger control and calibration
systems. An IEEE-488 system is more costly to set up, but has the ability to serve
multiple Calibrators and multiple UUTs. Also, parallel system throughput is faster than
serial system throughput. The controller in an IEEE-488 system is typically a MS-DOS
compatible personal computer (PC) equipped with one or more IEEE-488 ports. You can
write your own computer programs for system operation using the command set, or you
can purchase optional Fluke calibration software MET/CAL or 5520A/CAL, and
property management software MET/TRACK. Typical IEEE-488 configurations are
shown in Figure 5-1. The configuration showing the PC with two IEEE-488 ports is used
with MET/CAL, which prefers UUTs on a separate IEEE-488 port. You can also “piggy-
back” the connectors on a single IEEE-488 port.
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