Tektronix 2337, Инструкция по эксплуатации

Страница: 39 / 119

DISPLAYING A SIGNAL
A fter obtaining a Normal Sweep Display (baseline trace),
you are now ready to connect an input signal and display it
on the crt screen.
1. Connect the calibration generator standard-amplitude
output to both the CH 1 and CH 2 inputs as shown in
Figure 10.
2. Set the calibration generator fo r a standard-amplitude
1-kHz square-wave signal and adjust its output to obtain
a vertical display o f 4 divisions.
3. Adjust the Channel 1 POSITION control to center
the display vertically on the screen.
4. Adjust the A TRIGGER LEVEL control fo r a stable
triggered display.
NOTE
The A TRIGGER TRIG 'D-READY light should
illuminate to indicate that the A Sweep is triggered.
5. Rotate the FOCUS control between its maximum
clockwise and counterclockwise positions. The display
should become blurred on either side o f the optimum
control setting.
6. Set the FOCUS control fo r a sharp, well-defined
display over the entire trace length. If a well-focused
display cannot be obtained, see the "Astigm atism " adjust­
ment procedure under "Operator's Checks and Adjust­
ments." The ASTIG adjustment is used in conjunction
w ith the FOCUS control to initia lly obtain a well-defined
display over the entire trace length. Once set, the ASTIG
control usually requires little or no adjustment.
7. Move the display o ff the screen using the Channel 1
POSITION control.
8. Press in and hold the BEAM FIND push button;
the display should reappear on the screen. Adjust the
Channel 1 and Horizontal POSITION controls to center
the trace both vertically and horizontally. Release the
BEAM FIND button; the display should remain w ithin the
viewing area.
9. Adjust the INTEN control counterclockwise until
the display disappears.
26
2337 Operators
@