Fluke 54200 - Progressive Scan Check 2; Progressive Scan Check 3

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54200

Users Manual

4-68

This test pattern will be shown differently on a normal or a double scan rate TV receiver.

In general, the double scan rate TV will display a stable picture on the screen when using

this test signal, while a normal TV set will show a very unstable picture with line and

image flicker. Depending on the processing technique of the double scan rate TV

receiver the result may differ a little.

Progressive Scan Check 2

This B/W pattern with color burst offers four vertical white lines on a black background

moving in horizontal direction from left to right. The motion can be switched off at any

position of the screen by selecting the

DIGI_SCAN2_S

test pattern. This pattern contains

50 Hz and 25 Hz test signals for 625 line systems and 60 and 30 Hz signals for 525 line

systems.

The first white line of 200 ns is only present in one field. This will result in a 25 Hz or

30 Hz test signal. The second 200 ns vertical line is visible in the first and second field

producing a normal 50 Hz/ 60 Hz signal. The third line has a width of 370 ns in one field

and 200 ns in the next field. The fourth 370 ns vertical line is identical in both fields.

A. 0.2 µs, one field only

B. 0.2 µs, both fields

C. 0.37 µs one field, 0.2 µs next field

D. 0.37 µs both fields

2 µs distance between each vertical line A to D

Figure 4-102. Progressive Scan Check 2

Applications: See Progressive Scan Check 1.

Progressive Scan Check 3

This B/W pattern with color burst offers five groups of four white lines on a black

background alternating in +45°/-45° orientation. The pattern moves in horizontal

direction from left to right. The motion can be switched off at any position on the screen

by selecting the

DIGI_SCAN3_S

test pattern.