5080A
Getting Started Manual
20
Table 4. Front-Panel Features (cont.)
C
Y
The STBY (Standby) key places the 5080A in standby mode. Standby mode is indicated by
“STBY” in the lower left corner of the Output Display. In standby mode, the NORMAL, AUX and
20A output terminals are internally disconnected from the 5080A. The 5080A starts up in standby
mode. The 5080A automatically switches to standby if one of the following occurs:
The RESET key is pressed.
A voltage ≥ 33 V is selected when the previous output voltage was less than 33 V.
The output function is changed, except when going between ac or dc voltage <33 V. The current
output changes from 20A output to AUX output or from AUX output to 20A output.
The current is changed from ac to dc or from dc to ac.
An overload condition is detected.
D
O
The OPR (Operate) key places the 5080A in operate mode. Operate mode is indicated by “OPR” in
the lower left corner of the Output Display and the lit indicator on the OPR key.
E
Z
The EARTH (Earth Ground) key opens and closes an internal connection between the NORMAL
LO terminal and earth ground. An indicator on the key indicates when this connection is made. The
power-up default condition is earth disabled (indicator off).
F
a
The SCOPE (Oscilloscope) key activates or deactivates an oscilloscope calibration option if it is
installed. An indicator on the key indicates when the option is activated. If an oscilloscope
calibration option is not installed in the Calibrator and the SCOPE key is pressed, the Calibrator
displays an error message.
G
F
The MEG O (Megohm) key activates or deactivate the megohm calibration option if it is installed.
An indicator on the key indicates when the option is activated. If the megohm calibration option is
not installed in the Calibrator and the MEG O key is press, the Calibrator displays an error
message.
H
P
The PREV MENU (Previous Menu) key recalls the previous set of menu choices. Each press of
this key backs up one level of the menu tree until the display indicates the top level menu selection
of the function selected.
I
Softkeys
The functions of the five unlabeled blue softkeys are identified by labels on the Control Display
directly above each key. The functions change during operation so that many different functions
are accessible through these keys. A group of softkey labels is called a menu. A group of
interconnected menus is called a menu tree.
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