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Performance Tests
TDS 684A, TDS 744A, & TDS 784A Service Manual
4–63
H Press SAVE/RECALL WAVEFORM; then press the main-menu
button Save Wfm Ch 1.
H Press the side-menu button To Ref 1 to save the probe compensation
signal in reference 1.
H Disconnect the cable from CH 1 and the clips from the probe
compensation terminals.
H Press MORE; then press the main-menu button Ref 1 to displayed
the stored signal.
H Press CH 1.
d. Hook up the DC standard source:
H Set the output of a DC calibration generator to 0 volts.
H Connect the output of a DC calibration generator through a
dual-banana connector followed by a 50 W precision coaxial cable to
one side of a BNC T connector. See Figure 4–23.
H Connect the Sense output of the generator through a second
dual-banana connector followed by a 50 W precision coaxial cable to
the other side of the BNC T connector. Now connect the BNC T
connector to CH 1. See Figure 4–23.
DC Calibrator
50 W Coaxial Cables
Dual Banana to
BNC Adapters
BNC T
Connector
Digitizing Oscilloscope
Figure 4–23: Subsequent Test Hookup
e. Measure amplitude of the probe compensation signal:
H Press SHIFT; then press ACQUIRE MENU. Press the side-menu
button AVERAGE then enter 16 using the keypad or the general
purpose knob.