Test Products International 460 - Manual (Page 17)

7. AUTO
This is the Auto Ranging and optimal setting button. In the AUTO mode, the 460
will sense the parameter being measured and automatically adjust the oscilloscope
timebase to suit. The button also toggles between AUTO and MANUAL modes.
Note that the previous manual settings are lost once auto mode has activated.
8. SCOPE
This is a dual function oscilloscope switch. Initial activation (Scope /S1)
sets the oscilloscope program to display the SCOPE INPUTS interactive
menu. Activating the SCOPE switch a second time, sets the program to
display the Channel A waveform, the Channel B waveform (if it is
switched ON), and the A / B MOVE, TRIGGER / TREND selection menu.
Pressing the switch a third time will toggle the program back to SCOPE
INPUTS.
9. HOLD / RUN
This is a toggle switch that allows the user to freeze the currently dis
played waveforms. Once frozen, the user can choose to record the
waveform using the SAVE key (see callout #11), or to press the HOLD /
RUN key a second time to unfreeze the display.
10. USER
This is a toggle switch that allows a user to interrupt most ongoing
programs to revert to a setup mode to adjust Contrast, RS-232C output,
or Power Down, and then revert to the original program by pressing
the button a second time. Note that the POWER DOWN menu selection
allows an automatic timed power down for special functions.
11. SAVE
This is a toggle switch that allows a screen save (traces only) for a
maximum of two saves and/or recalls. You can delete an existing capture,
or automatically overwrite to the selected memory. Pressing the button
a second time reverts to the original display.
Key / Screen Menus
The following tables provide a graphical explanation of the key and menu interactions and menu
item sequencing. Most sequences begin with a key and are at the left of the diagrams. The col-
ors of the keys are below the appropriate boxes.
Note that the two Scope entries (Scope / S1 in Table 3-1, and Scope / S2 in Table 3-2) represent
the two sequential functions of the same switch.
460 User s Guide Operation
C3-3