Tektronix 2225, Руководство оператора

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Operation
FRONT PANEL ORGANIZATION
The front panel on the 2225 is organized to make it easy for you to
set up displays and make measurements. Referring to the foldout
illustration at the front of this manual, or to the oscilloscope itself,
notice that the front panel is partitioned into four major control
sections— Display, VERTICAL, HORIZONTAL, and TRIGGER.
Just to the right of the cathode-ray tube (crt) screen are the Dis­
play controls. They are used to adjust brightness and focus of the
trace, to align the trace horizontally, and to help you find off­
screen signals quickly. These controls affect the display, but not
the waveform.
Like any oscilloscope, the 2225 draws a graph of voltage as a
function of time. The VERTICAL section, enclosed within shaded
gray lines, contain the controls that define the voltage (or vertical)
axis of the display. Also a part of this section are the two BNC
input connectors, which are used to apply the signals that you
want to view.
The HORIZONTAL controls are to the right of the VERTICAL sec­
tion. They are used to set and move the time (or horizontal) axis
for the displayed traces.
On the extreme right of the front panel, enclosed within shaded
green lines, is the TRIGGER section. Trigger controls define the
signals and the conditions that are needed to initiate (or trigger)
every sweep across the time axis. An indicator light shows
whether the sweep is validly triggered or not. At the bottom of the
TRIGGER section is a BNC input connector that can be used to
apply either an external trigger signal or an external Z-axis (dis­
play intensity) control signal.
CONTROLS, CONNECTORS, AND INDICATORS
Table 2-1 gives you a summary of all the controls, connectors, and
indicators on your 2225 Oscilloscope. Following the table is a
short procedure describing how to get a display. The remainder
of this section offers suggestions and tips for using the controls to
obtain the most effective displays and to make the most accurate
measurements.
2225 Operators 2-1