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Performance Tests
TDS 684A, TDS 744A, & TDS 784A Service Manual
4–65
Option 05 Video Trigger Checks
Equipment
Required
PAL signal source (Item 16)
60 Hz. sine wave generator (Item 17)
Pulse generator (Item 18)
Two 75 W cables (Item 19)
Two 75 W terminators (Item 20)
One BNC T connector (Item 7)
50 W cable (Item 5)
50 W terminator (Item 4)
Prerequisites See page 4–15. These prerequisites include running the signal path
compensation routine.
1. Set up digitizing oscilloscope to factory defaults by completing the following
steps:
a. Press save/recall SETUP.
b. Press the main-menu Recall Factory Setup.
c. Press the side-menu OK Confirm Factory Init.
d. Wait for the Clock Icon to leave the screen.
e. CONFIRM the digitizing oscilloscope is setup as shown below.
Channel: CH1
Volt/div: 100 mV
Horizontal scale: 500 ms/div
2. Set up digitizing oscilloscope for TV triggers by completing the following
steps:
a. Press TRIGGER MENU.
b. Press the main-menu Type pop-up until you select Video.
c. Press the main-menu Standard pop-up until you select 625/PAL.
d. Press the main-menu Line.
e. Use the keypad to set the line number to 7 (press 7, then ENTER).
f. Press VERTICAL MENU.
Check Video Trigger