TDS 420A, TDS 430A & TDS 460A Service Manual
2-7
Operating Information
Before doing service, read the following operating instructions. These instruc-
tions are at the level appropriate for servicing this digitizing oscilloscope. The
complete operators instructions are found in the user manual.
Additional instructions are integrated into the service procedures found in later
chapters of this manual. For instance, the procedures found in the Performance
Verification chapter, starting on page NO TAG, contain instructions for making
the front-panel settings required to check each oscilloscope characteristic
included there. Also, the general instructions for operating the internal diagnostic
routines are found in the, Maintenance chapter, starting on page 6--1. Yo u m ay
also find the Product Description, starting on page 4--1, useful for understanding
how the oscilloscope functions.
Screen Layout
The screen layout is illustrated in Figure 2--1 on page 2--8. Note that the figure
illustrates a full graticule; you may also select a grid, crosshair, or frame
graticule from the display menu.
Basic Procedures
Push the principal power switch found on the rear panel of the digitizing
oscilloscope, then push the ON/STBY (standby) switch to toggle the digitizing
oscilloscope into operation. The switch at the rear panel is the true power
disconnect switch. The ON/STBY(standby) switch simply toggles operation on
and off.
WARNING. The principal power switch at the rear panel is the true power
disconnect switch. The ON/STBY (standby) switch simply toggles operation on
and off. When connected to a power source and when the principal power switch
is on, some power supply circuitry in this digitizing oscilloscope is energized
regardless of the setting of the ON/STBY switch.
When connecting or disconnecting the line cord to or from the power source, the
principal power switch should be off.
How to Power On
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