B&K Precision 1253 - Manual - Manual (Page 16)

8: Multiburst
Description: Consists of 6 frequency bands increasing in frequency, from left to right, and separated by
gaps of mid gray. Vertical segments are filled with alternating black and white stripes. The frequencies
are at 1.125MHz, 2.25MHz, 3.375MHz, 4.5MHz, 6.75MHz and 13.5MHz for the HDTV formats, and
0.75MHz, 1.125MHz, 2.25MHz, 3.375MHz, 4.5MHz and 6.75MHz for the SDTV formats.
Pattern Usage: Use to check a display device’s capability to produce sharply defined stripes, at equal
brightness, up to the format’s full resolution. This pattern is also useful in adjusting the sharpness control.
Starting with the sharpness control at its minimum setting, increase the control until all five bursts are at
equal brightness levels. Do not adjust the control high enough to cause ghosting lines adjacent to the
widest stripes.
Also used to test the resolution on a DTV set, as well as frequency response of a transmission system, or
cable. An oscilloscope, with TV Line lock, may be used to check the attenuation with respect to
frequency.
Examples of Uncalibrated Displays: The following image indicates a TV with insufficient high
frequency response. The black and white stripes on the right of the display are blurred together. You may
sometimes improve this by increasing the Sharpness setting. Keep in mind, many monitors can not
display the highest (right-hand-side) frequency band of this pattern, and many SDTV monitors can not
display the highest 2 frequency band of this pattern.
Stripes are blurred together
They appear gray.