1-18 Getting Started Model 6485 and 6487 User’s Manual
Analog output
The Model 6487 has an analog output on the rear panel. The ANALOG OUT provides a
scaled, inverting ±2V output. A full-scale reading corresponds to ±2V output. See “Ana-
log output,” page 2-14 in for full details on analog output operation.
Digital I/O
The Model 6487's Digital I/O port is a male DB-9 connector located on the rear panel. The
four active-low, digital output lines and one input line are used to control external circuitry. For
detailed connection and usage information, refer to Section 8 of the Model 6487 Reference
Manual.
Display
Readings can be displayed in engineering units or scientific notation. Annunciators indi-
cate various states of operation. See “Model 64
87 front panel summary,” page 1-13 for a
complete listing of display annunciators. The normal displa
y also includes the voltage
source value on the right.
NOTE Ch
anging the display resolution is not allowed if displaying readings in scientific
notation.
The DISP key can be used to turn the display o
n or off. The Display and Keys Test allows
you to test display digit segments and annunciators, and check the functionality of front
panel keys. These tests are accessed through the MENU.
Status and error messages
Status and error messages are displayed momentarily. During operation and program-
ming, you will encounter a number of front panel messages. Typical messages are either
of
status or error variety, as listed in Appendix B of the Model 6487 Reference Manual.
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