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PERFORMANCE TEST
4.3.19
Vertical deflection; visual signal delay
Many applications require that the leading edge of a fast pulse triggering the
oscilloscope be made visible. A fixed amount of signal delay is introduced in the
vertical channels of this instrument to allow the timebase to start before the
triggering leading edge causes vertical deflection to occur.
This delay is verified in the following test.
Test equipment
Fluke 5500A mode: edge (Alternative: Square-wave calibration generator PG 506).
Test set-up:
Settings/procedure:
1
-
Apply a signal with a fast rise time of less than 1 ns and an amplitude of
0.5V (into 5
0Ω
), and a frequency of 1 MHz, to input CH1.
2
-
Press the AUTOSET button and set CH1 to 0.1V/div.
3
-
Use a 50
Ω
termination. Use the internal termination when provided (via
VERT MENU key).
4
-
Set the MAIN TB TIME/DIV to 50.0 ns/div.
5
-
Press the MAGNIFY key and turn the X POS control to display the leading
edge.
6
-
Turn the TRACE INTENSITY control clockwise for maximum intensity.
7
-
Press the TRIGGER menu key.
8
-
Select level pp ’off’ and ’dc’ trigger coupling from the TRIGGER MAIN TB
menu.
9
-
Adjust TRIGGER LEVEL for a triggered display and maximum visible
signal delay.