Tektronix TDS540A Benutzerhandbuch
Brief Procedures
Performance Verification Procedures
1Ć8
H
Hi Res mode displays an actively acquiring waveform on-screen
with the noise that was present in Sample mode reduced.
with the noise that was present in Sample mode reduced.
H
Envelope mode displays an actively acquiring waveform on-
screen with the noise displayed.
screen with the noise displayed.
H
Average mode displays an actively acquiring waveform on-
screen with the noise reduced like in Hi Res mode.
screen with the noise reduced like in Hi Res mode.
TDS 520A and 524A only: Substep e will have you repeat the pre-
vious substeps to check all input channels. Be sure to check only CH
1 and CH 2 when testing the TDS 520A or 524A. (Step 3 will test the
AUX 1 and AUX 2 inputs.) When testing the TDS 540A or 544A, test
all four channels, CH 1 through CH 4.)
vious substeps to check all input channels. Be sure to check only CH
1 and CH 2 when testing the TDS 520A or 524A. (Step 3 will test the
AUX 1 and AUX 2 inputs.) When testing the TDS 540A or 544A, test
all four channels, CH 1 through CH 4.)
e.
Test all channels: Repeat substeps a through d until all four input
channels are verified.
channels are verified.
3.
TDS 520A and 524A Only: Verify auxiliary inputs operate: Perform the
following substeps when checking the AUX 1 and AUX 2 inputs only.
following substeps when checking the AUX 1 and AUX 2 inputs only.
a.
Select an auxiliary channel:
H
Press WAVEFORM OFF to remove from display the channel just
verified.
verified.
H
Press the front-panel button that corresponds to the channel you
are to verify.
are to verify.
H
Move probe to the channel you selected.
b.
Set up the selected channel: Press AUTOSET to obtain a viewable
display in the selected channel.
display in the selected channel.
The display obtained might not trigger stably because autoset cannot
provide more than about
provide more than about
signal
amplitude in an auxiliary channel equipped with a 10X probe. This
amount is less than the minimum trigger sensitivity for auxiliary
channel trigger sources; therefore, triggering is not required.
amount is less than the minimum trigger sensitivity for auxiliary
channel trigger sources; therefore, triggering is not required.
c.
Verify that the channel is operational: Confirm that the following
statements are true.
statements are true.
H
The vertical scale readout for the channel under test shows a
setting of 1 V, and a square-wave probe-compensation signal
about
setting of 1 V, and a square-wave probe-compensation signal
about
on
page 1-3 to locate the readout.)
H
The vertical POSITION knob moves the signal up and down the
screen when rotated.
screen when rotated.
H
Turning the vertical SCALE knob counterclockwise to 10 V
decreases the amplitude of the waveform on-screen. (The ampli-
tude will drop to near zero when doing this substep.)
decreases the amplitude of the waveform on-screen. (The ampli-
tude will drop to near zero when doing this substep.)
H
Returning the knob to 1 V returns the amplitude to about
divi-
sion.
d.
Verify that the channel acquires in all acquisition modes: Disconnect
the probe ground lead from the probe-compensation terminal. Do
step 2, substep d to verify the five acquire modes.
the probe ground lead from the probe-compensation terminal. Do
step 2, substep d to verify the five acquire modes.