Tektronix TAS 465, Service Manual

Page: 59 / 268

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8. Press the button andalign the active cursor to the bottom of
the signal using the General Purpose Knob.
9. Verify that the D Volts readout is about 5.2 V.
10. Set D to # .
11. Align the active cursor to a rising edge of the signal using the General
Purpose Knob.
12. Press the button andalign the active cursor to the next rising
edge of the signal using the General Purpose Knob.
13. Verify that the 1/ D T readout is about 1 kHz.
14. Set D to # .
15. Verify that the D Time readout is about 1 ms.
&+ ( #%)( ##!'
1. Display the channel to be verifiedandturn all others off.
2. Install the probe on the channel to be verified.
3. Press the button.
4. Press the button andset to .
5. Verify that the channel is operational, confirming the following stateĆ
ments are true:
H The vertical scale readout is set to 2 V for the channel under test
and a square wave signal about 2.6 divisions in amplitude is onĆ
screen.
H Pressing the button sets the trigger level
readout to approximately 2.7 V.
H Turning vertical control moves the signal up anddown
the screen when rotated. Return the bottom portion of the displayed
waveform to the center horizontal graticule line.
H Turning the control counterclockwise andclockwise
decreases and increases the amplitude of the waveform. Return the
volts/div scale to 2 V.
6. Press the button andselect . Select the followĆ
ing coupling types andverify the display.
H Select coupling andverify that the waveform amplitude is posiĆ
tiveĆgoing from the center horizontal graticule line.
H Select coupling, press the button, and
verify that the waveform is centeredat about the center horizontal
graticule line.
H Select coupling andverify that a straight line is displayed(no
waveform).