Front Panel Controls - Keithley 194 Instruction Manual

GETTING STARTED
Figure 2-3. Front Panel Controls
The following controls are indicated in Figure 2-3.
0
l6 AUTO-The AUTO button enables or disables the
autoranging mode. The annunciator to the right of the but-
ton will be on when the autoranging mode is enabled.
While in this mode, the instrument will choose the best
range to measure the applied signal. Note that a separate
trigger may be required for each range change even if in
auto. Autoranging may be cancelled by pressing AUTO a
second time, or by pressing either the uprange or
downrange keys.
0 Uprange (
A
b)-This key. serves several functions.
The most obvious is to move the instrument uprange once
each time it is pressed until the highest range is reached.
Once the maximum range is established, pressing uprange
will have no further effect. In the data entry mode, this
key moves the display cursor one place to the right each
time it is pressed. In the XY pan mode, the uprange key
moves the viewed data to the right. Uprange is used to
increment the buffer location being accessed when the in-
strument is in the data recall mode. Finally, this key is us-
ed to scroll through front panel programs, trigger sources,
and filter and XY modes.
@
Downrange
(4.)-Like the uprange key, down-
range has a number of functions: to move the instrument
down one range each time it is pressed, to move the
display cursor ti the left in the data entry mode, to decre-
ment the scaling factor in the XV zoom mode, to move the
viewed data to the left in the XY pan mode, to decrement
the buffer location in the data recall mode, and to scroll
through front panel programs, trigger sources, and filter
and XY modes.
@ SHIFT-The
SHIFT key allows selection of secondary
functions. Shifted modes are marked in yellow below the
respective keys. When the shift mode is enabled, the
yellow annunciator to the right of the key will be on. The
shift mode can be cancelled by pressing the SHIFT key
a second time. If a key with no shifted mode is pressed
(for example, RECALL), a SHIFTLESS KEY error message
will be displayed.
0 0 RECALL-This
key is used to recall data from the
measurement buffer. Once in this mode, the buffer loca-
tion to be accessed can be keyed in with the data entry
keys, or decremented or incremented with the downrange
or uprange keys. The RECALL annunciator will be on
while the instrument is in the recall mode. To cancel this
mode, press RECALL or CANCEL.
0
1 STATUS-Returns
information on present instru-
ment configuration, including A/D and scanner module
parameters, if installed. The instrument will scroll through
various operating parameters.
0
(RESET)-The RESET key returns the unit to power-
on configuration determined by the setup 1 configuration.
2-6