Brief Procedures
4-10
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
H Turning the vertical SCALE knob counterclockwise (for the channel you
are testing) decreases the amplitude of the waveform on-screen, turning
the knob clockwise increases the amplitude, and returning the knob to
the original scale setting returns the amplitude to that shown in
Table 4--1 for that scale setting.
7. Verify that the channel acquires in all acquisition modes: Pull down the
Horiz/Acq menu to select Horizontal/Acquisition Setup. . . . Click the
Acquisition tab in the control window that displays. Click each of the
acquisition modes and confirm that the following statements are true.
H Sample mode displays an actively acquiring waveform on-screen. (Note
that there is a small amount of noise present on the square wave).
H Peak Detect mode displays an actively acquiring waveform on-screen
with the noise present in Sample mode “peak detected.”
H Hi Res mode displays an actively acquiring waveform on-screen with the
noise that was present in Sample mode reduced.
H Average mode displays an actively acquiring waveform on-screen with
the noise reduced.
H Envelope mode displays an actively acquiring waveform on-screen with
the noise displayed.
H Waveform Database mode displays an actively acquiring waveform
on-screen with the noise displayed.
8. Test all channels: Repeat steps 2 through 7 until all four input channels are
verified.
9. Remove the test hookup: Disconnect the equipment from the channel input
and the probe compensation output.
Equipment
required
One BNC cable, such as Tektronix part number 012-0076-00
One TCA-BNC adapt er
Prerequisites None
1. Initialize the instrument:Push the front-panel DEFAULT S ETUP button.
2. Hook up the signal source: Connect the BNC cable from the probe com-
pensation output to the CH 1 input through a TCA-BNC adapter as shown in
Figure 4--4.
Verify the Time Base
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