Selecting The Digital Input - HP 61010A Owner's Manual

3
Selecting the
Digital Input
Manual Instrument Control
You may have some idea of how to manually operate the
Digital I/O from the procedure given in Chapter 2. That
chapter gave you a brief overview of some of the Soft
Front Panel controls of your instrument. This chapter gives
you detailed information about inputting (reading) and
outputting (writing) data on your Digital I/O, Separate
descriptions are given for each of these two main functions
of your instrument, which are referred to as Digital Input
and Digital Output. Chapter 4 of the System Owner's
Manual describes the Soft Front Panel features (including
softkeys) that are common to all instruments.
The Digital I/O must be displayed in the Interactive
Instrument Window before you can manually operate it.
Only the Digital Input or the Digital Output can be
operated at one time. If the Digital Input is not already
displayed in the Interactive Instrument Window, point to
and select its label in the System View window.
Figure 3-1 shows the factory default settings that appear
when the first Digital Input in your PC Instruments
System is selected. These defaults are: decimal base,
2's-complement, positive logic sense, 16-bit length, 0 start
bit, 1.36 V threshold, handshake disabled, and auto
update. The default label (DIG.IN.01) appears in the upper
right corner of the Interactive Instrument Window. The
Interactive Instrument Window can display either the front
panel or rear panel of the Digital Input. Use the FRONT
PANEL softkey to display the front panel. This is the
panel by which you operate the Digital Input. If the front
panel that appears on your computer's display does not
Manual Instrument Control 3-1