Tektronix TDS 420A - Check External Clock

Performance Tests
TDS 420A, TDS 430A & TDS 460A Service Manual
4-47
Equipment
Required
One Function generator (Item 14)
One Sine Wave generator (Item 11)
One 50Ω terminator (Item 3)
One N to BNC adapter (Item 15
One BNC T connector (It em 8)
Two precision coaxial cables (Item 5)
Prerequisites See page 4--15.
1. Install the test hookup and preset the instrument controls:
a. Initialize the oscilloscope:
H Press save/recall SETUP.
H Press the main-menu button Recall Factory Setup.
H Press the side-menu button OK Confirm Factory Init.
b. Hook up the test-signal source:
H Set the Vertical S CALE to 1 Volt per division.
H Connect the output of a function generator through a 50 Ω precision
coaxial cable and a 50 Ω terminator to the CH 1 input.
H Set the output of the function generator for a 5 MHz, 0 to 4 Volt
(4 division) square wave at the oscilloscope input.
H Move the setup from the CH 1 input to the AUX TRIGGER/EXT
CLOCK input on the rear panel of the oscilloscope (see
Figure 4--17).
Sine Wave
Generator
Digitizing Oscilloscope
Function
Generator
Output
To Rear Panel
Output
Figure 4- 17: Initial Test Hookup
Check External Clock