Performance Tests
TDS 684A, TDS 744A, & TDS 784A Service Manual 4–71
Positive pulse
Negative pulses
Figure 4–29: Triggered Signal Range Test – 75 mV
p. Disconnect all test equipment (TSG121) from the digitizing oscillo-
scope.
5. Check 60 Hz Rejection.
a. Set up oscilloscope for 60 Hz Rejection Test.
HUse the keypad to set the Ch1 Fine Scale to 282 mV (press 282,
SHIFT m, then ENTER).
HPress WAVEFORM OFF.
HPress CH2.
HPress VERTICAL MENU.
HUse the keypad set the fine scale to 2 V (press 2, then ENTER).
HPress HORIZONTAL MENU.
HUse the keypad to set the horizontal scale (/div) to 5 ms (press 5,
SHIFT, m, then ENTER).
b. Set up 60 Hz signal generator (SG 502).
HConnect the output of the SG 502 to the CH2 input through a 50 W
cable. See Figure 4–30.