Adjustment
TDS 310, TDS 320 & TDS 350 Instruction Manual
73
7. Press the main menu button Signal Path. Read the onscreen text before
continuing.
8. Press the side menu button OK Compensate Signal Paths.
9. Wait. The signal path compensation routine takes about four minutes to
run.
10. Move the hookup to the EXT TRIG input.
11. Press UTILITY.
12. Press the main menu button Ext Trig. Read the onscreen text before
continuing.
13. Press the side menu button OK Calibrate External Trig. Follow the
instructions on the screen.
14. Disconnect the DC calibration generator and connect the -1 V fast rise
output of a calibration generator to the CH 1 input through a 50 W coaxial
cable and a 50 W termination (Item 2).
15. Set the calibration generator to output a 1 ms, fast rise signal; set the
pulse amplitude to 50%.
16. Press SAVE/RECALL SETUP. Press the main menu button Recall Facto
ry Setup; then press the side menu button OK Confirm Factory Init.
17. Press AUTOSET. Then adjust the vertical POSITION control to center the
waveform on the screen so that the trigger arrow is at the center graticule,
set the VOLTS/DIV to 50 mV, and set the SEC/DIV to 250 ns. This should
result in a waveform similar to the one shown in Figure 72.
Figure 72:Timing Compensation Waveform
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