Performance Tests
4–18
TDS 340A, TDS 360 & TDS 380 Technical Reference
Trigger System Checks
These procedures check those characteristics that relate to the trigger system and
are listed as checked under Warranted Characteristics in the Specifications
section.
Equipment Required: One leveled sine wave generator (Item 7 or 8), two
precision 50 W coaxial cables (Item 2), one 50 W termination (Item 1), and one
BNC T connector (Item 4).
Time Required: Approximately 10 minutes.
Prerequisites: See page 4–11.
Procedure:
1. Press SAVE/RECALL SETUP ! Recall Factory Setup ! OK Confirm
Factory Init.
2. Set the vertical SCALE to 500 mV/div.
3. Set the horizontal SCALE to 10 ns/div.
4. Press TRIGGER MENU ! Mode ! Normal.
5. Press ACQUIRE ! Mode ! Average 16.
6. Connect one 50 W cable to the output of the sine wave generator. Attach a
BNC T connector to the other end of the cable. Connect a second 50 W cable
to the other side of the BNC T connector.
7. Connect the BNC T connector to CH 1; connect the cable to the EXT TRIG
input through a 50 W termination as shown in Figure 4–9.
Digitizing oscilloscope
50 W termination
Leveled
sine wave
generator
Output
EXT TRIG
Figure 4–9: Hookup for trigger sensitivity check
Check Edge Trigger
Sensitivity, DC Coupled
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