Tektronix 4000 Series, Service Manual

Page: 33 / 78

Adjustment Procedures
Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual
3- 9
b. Push the side--bezel button for a 6 V signal or push the
side--bezel button for a --6 V signal. The polarity will be
indicated only by the icon that appears in the upper--left corner of the
calibrator screen.
c. Set the amplitude to either 6 V or --6 V.
d. Set the Pulse/Energy setting to 7.2 Joules (the time should show
10s).
e. When all of the parameters are set and you ensure that the output is
ON, push the
Trig Pulse side--bezel and IMMEDIATELY push the
OK Do Next Step side--bezel button on the oscilloscope. WARN-
ING Once you push the
Trig Pulse
button on the calibrator, you
have only 9 seconds to push the OK Do Next Step button on the
oscilloscope. If the instrument fails one of these tests, go all the way
back to the first 6 V test (6 V on channel 1) and start that sequence
over again.
7. Ensure that the red light is illuminated to indicate that the output is on. If
not, push the
ON
button, as shown below:
8. On the oscilloscope, push the OK Do Next Step side--bezel button.
The Time Mark test is often the second test type to appear in the prompts. When
you receive a time mark prompt, complete the following steps:
1. Push the Markers front--panel button.
2. Push the WAVEFORM lower--bezel button, and then push the
side--bezel button.
NOTE
. If a 625 Hz signal is required, set the time marker to 1.6 ms.
Time Mark