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Performance Tests
TDS 684A, TDS 744A, & TDS 784A Service Manual
4–31
a. Select an unchecked channel:
H Press WAVEFORM OFF to remove the channel just confirmed
from the display.
H Press the front-panel button that corresponds to the channel you are
to confirm.
H Set the generator output to 0 V.
H Move the test hookup to the channel you selected.
b. Turn on the measurement Mean for the channel:
H Press MEASURE, then press the main-menu button Select
Measrmnt for CHx.
H Press the side-menu button more until the menu label Mean appears
in the side menu (its icon is shown at the left). Press the side-menu
button Mean.
H Press CLEAR MENU.
c. Set the vertical scale: Set the vertical SCALE to one of the settings
listed in Table 4–3 that is not yet checked. (Start with the first setting
listed.)
Table 4–3: DC Accuracy
Scale
Setting
Position
Setting
(Divs)
Offset
Setting
Generator
Setting
TDS 684A
Accuracy Limits
TDS 7XXA
Accuracy Limits
5 mV –5 +1 V +1.040 V +1.029 V to +1.0513 V +1.0355 V to +1.0445 V
+5 V –1 V –1.040 V –1.0513 V to –1.029 V –1.0445 V to –1.0355 V
200 mV –5 +10 V +11.6 V +11.420 V to +11.786 V +11.5385 V to +11.6615 V
+5 –10 V –11.6 V –11.786 V to –11.420 V –11.6615 V to –11.5385 V
1 V –5 +10 V +18V +17.26 V to +18.76 V +17.7785 V to +18.2215 V
+5 –10 V –18 V –18.76 V to –17.26 V –18.2215 V to –17.7785 V
d. Display the test signal:
H Press VERTICAL MENU. Press the main-menu button Position.
H Use the keypad to set vertical position to –5 divisions (press –5, then
ENTER, on the keypad). The baseline level will move off screen.
H Press the main-menu button Offset.