5700A/5720A Series II
Operators Manual
3-6
Table 3-1. Front Panel Features (continued)
G
B
Enables or disables output from an amplifier, when it would not otherwise be
automatically selected. Sets the calibrator to standby if this selection moves
the output location.
When available, an amplifier is automatically selected for output settings that
exceed the calibrator’s capabilities but fall within the limits of the selected
amplifier. The B key is only needed to activate an amplifier for an output
setting that is available from either the calibrator or the amplifier. This allows
you to take advantage of amplifier capabilities besides extended range, such
as higher compliance voltage.
For both voltage and current, the amplifier is assumed to be a 5725A unless
another model is designated in the setup menus.
H
P (Previous Menu)
The
P softkey aborts the current operational state of the calibrator and
recalls the previous set of menu choices. Some menus display a more
specific label for this key, such as "DONE Setting Up".
I
Softkeys
The functions of the five unlabeled 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. Figure 3-3 shows the menu tree for the
calibrator.
J
Power Switch
Turns the power on and off. The switch remains locked inwards when the
power is on. Pushing the switch again unlocks it and turns the power off.
K
< a >
The output adjustment controls. If any of these keys are pressed or the knob
is rotated, a digit on the Output Display becomes highlighted and the output
increments or decrements as the knob is rotated. If a digit rolls past 0 or 9,
the digit to its left or right is carried. An error display appears on the Control
Display, showing the difference between the original (reference) output and
the new (adjusted) output.
The < and > keys adjust the magnitude of changes by moving the
highlighted digit. In the ac functions, the
a key toggles between voltage or
current to frequency. For voltage and current outputs, the knob and arrow
keys are used to adjust output until the UUT reads correctly. The error
display then displays UUT deviation from the reference.
Since resistances are not adjustable, the knob and arrow keys adjust a value
on the Control Display to equal the UUT reading. Refer to "Error Mode
Operation" in Chapter 4 for details of entering, operating, and exiting Error
Mode.
The rotary knob is also used to adjust the phase of the ac output signal with
respect to a signal at the VARIABLE PHASE OUT connector after the
"Phase Ctrls Menu" softkey is pressed.
L
r
Aborts the current operating state of the calibrator and returns it to its power-
up default state.
r has no effect when operating under remote control.
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