Performance Verification
013-0278-00 Video Display Clamp
11
Test signal (channel 2)
Corrected signal (channel 1)
Figure 8: Back porch correction test (positive)
These procedures check those characteristics that relate to the gain error of the
Video Display Clamp listed as checked under
Warranted Characteristics
in the
Specifications
section
.
Equipment Required:
One test oscilloscope (Item 1), one pulse generator
(Item 8), one precision coaxial cable (Item 2), one 2.5X attenuator (Item 4), one
50
Ω
terminator (Item 3), and one dual-input coupler (Item 5).
1.
Set the test oscilloscope as follows:
H
Set the sec/div scale to 10
s
H
Set the channel 1 volts/div scale to 200 mV, DC coupled
H
Set the channel 2 volts/div scale to 500 mV, DC coupled
H
Position both channel 1 and 2 traces to center screen
H
Display channel 2 (channel 1 off)
2.
Connect the output of the pulse generator to the test oscilloscope as shown in
Figure 9.
NOTE
. This test setup provides a display of the test signal on channel 2 and a
clamped test signal on channel 1.
Gain Error Check
