Tektronix 2205, Руководство оператора

Страница: 34 / 91

Operation
HORIZONTAL CONTROLS
S w eep-S peed Selection
The unmagnified sweep (MAG set to X I ) is the horizontal func­
tion needed for most applications. Best measurement accuracy
is achieved by setting the SEC/DIV control for the fastest sweep
that will display the interval of interest. The variable control
(CAL) should be in its detent (fully clockwise).
Magnifying W aveform Details
The X I 0 MAG mode expands the unmagnified trace. A magni­
fied trace is useful for observing specific portions of a waveform
when you are making accurate timing measurements or looking
at waveform details.
When selected, X I 0 MAG mode lets you examine details, such
as the entire leading edge of a pulse’s second repetition, of a
trace up to 10 screen lengths from the trigger point.
Appendix A lists the sweep speeds for 10X magnification at
every SEC/DIV control setting.
The one-division segment of the unmagnified trace centered on
the middle vertical graticule line is expanded and displayed as
the magnified trace. With the center vertical graticule line as the
reference, the investigation of waveform details arpund any
point on the unmagnified trace, as well as the measurement of
time with greater accuracy, become easy tasks.
TRIGGER CONTROL
For most signals, the trigger-control settings that will yield
hands-off triggering are:
MODE P-P AUTO
SOURCE VERT MODE
2-10
2205 Operator's