Tektronix TDS 820, Руководство пользователя

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Brief Procedures
Appendix C: Performance Verification
TDS 820 Performance Verification
1Ć7
b. Set up the selected channel:
H
Press AUTOSET to obtain a viewable, triggered display in the
selected channel.
H
Set the horizontal SCALE to 200 ns. Press CLEAR MENU to
remove any menu that may be on the screen.
c. Verify that the channel is operational: Confirm that the following
statements are true.
H
The vertical scale readout for the channel under test shows a
setting of either 50 mV or 100 mV, and a square-wave signal
about 350 mV to 700 mV in amplitude is on-screen. (See Fig-
ure 1-1 on page 1-3 to locate the readout.)
H
The vertical POSITION knob moves the signal up and down the
screen when rotated.
H
Turning the vertical SCALE knob counterclockwise decreases the
amplitude of the waveform on-screen, turning the knob clockwise
increases the amplitude, and returning the knob to its original
setting (50 mv or 100 mV) returns the amplitude to its original
number of divisions.
d. Verify that the channel acquires in all acquisition modes: Press
SHIFT; then press ACQUIRE MENU. Use the side menu to select, in
turn, each of the three acquire modes and confirm that the following
statements are true. Refer to the icons at the left of each statement
as you confirm those statements.
H
NORMAL mode displays an actively acquiring waveform on-
screen. (Note that there is noise present on the peaks of the
square wave.)
H
Envelope mode displays an actively acquiring waveform on-
screen with the noise displayed.
H
Average mode displays an actively acquiring waveform on-
screen with the noise that was present in Normal mode reduced.
e. Test all channels: Repeat substeps a through d until all input channels
are verified.
3. Remove the test hookup: Disconnect the SMA cables and T connector
from the front panel inputs and the 1 MHz TEST SIGNAL OUTPUT
connector.