Chapter 2 System Operation 9
When the editable data field is in the read-only state, it looks and acts
exactly like a non-editable data field. Like the non-editable data field, it
cannot have focus, and the up or down arrow keys will skip over the field.
This state is used primarily to lockout specific data elements from front
panel change when the Model 5600 is in remote mode. Any IEEE-488 or RS-
232 communication will place the unit in remote mode, and editable fields
that are protected during remote operations change to the read only state.
2.4.1.3.1 Changing Data Fields
A data field can only be changed from the front panel when the field is the
focus. Some fields are numeric-based, such as current set point or limits.
Other fields are multi-choice fields, such as Yes/No fields. Both types are
changed with the left and right arrows or the dial.
2.4.1.4 Controls
There are certain functions in the 5600, such as setting the photodiode zero
reference, that require a “button push”. Because the 5600 has no additional
buttons to do this function, it uses a “soft button”. A soft button is similar to
an edit field, but instead of selecting a value with the left and right arrow
keys when the field is selected, the left and right arrow keys function as
custom defined buttons for as long as that field is selected. For example, the
return to local function is not a setting or value, but a state of operation. A
soft button for return to local might look like this:
→
→→
→
Local
→
→→
→
Set
When this field is selected, as in this example, pressing the right arrow key
would set the unit to local mode. There are also elements on the 5600 which
use the left arrow as well, such as this example:
→
→→
→
Set
←
←←
←
PD Zero
→
→→
→
Clr
In this case, pressing the left arrow key will set the photodiode zero
reference to the current input level, and pressing the right arrow key would
clear the zero reference.
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