Tektronix 684A User Manual

Performance Tests

TDS 684A, TDS 744A, & TDS 784A Service Manual

These procedures check those characteristics that relate to the Main and Delayed
time base system and are listed as checked under Warranted Characteristics in
Specifications.

One time-mark generator (Item 13)

One 50 

, precision coaxial cable (Item 5)

See page 4–15

50 

 Coaxial Cable

Time Mark

Generator

Digitizing Oscilloscope

Output

1. Install the test hookup and preset the instrument controls: 

a. Hook up the test-signal source: Connect, through a 50 

W precision

coaxial cable, the time-mark output of a time-mark generator to CH 1.
Set the output of the generator for 10 ms markers.

b. Initialize the oscilloscope:

H Press save/recall SETUP. Press the main-menu button Recall

Factory Setup. Press the side-menu button OK Confirm Factory
Init.

H Set the vertical SCALE to 500 mV.

H Press VERTICAL MENU; then press the main-menu button

Coupling. Press the side-menu button 

 to toggle it to the 50 

setting.

H Press SET LEVEL TO 50%.

H Use the vertical POSITION knob to center the test signal on screen.