Ensemble Designs 5400 Dual Sync Generator and Test Signal Generator with HD Tri-Level Sync - Manual (Page 39)

Sweep Test Patterns
Sweep test patterns are used to evaluate frequency response by examining the envelope of
the waveform on a waveform monitor.
Full Field Sweep
Luminance sweeps to 5.75 MHz and chrominance sweeps to 2.75 MHz.
Sweep with Markers
The addition of markers at 0.5, 1, 2, 3, 4, and 5 MHz in the luminance channel and
0.25, 0.5, 1, 1.5, 2, and 2.5 MHz in the chrominance channel assist in evaluating
response.
Multiburst
Instead of continuous sweep, discrete frequencies are positioned across the line.
Luminance frequencies are 0.5, 1, 2, 3, 4, and 5.75 MHz, and chrominance frequen-
cies are 0.5, 1, 1.5, 2, 2.5, and 2.75.
Pulse and Bar Test Patterns
These test patterns are used to evaluate transient response and clamp performance.
Chroma-to-luminance delay, short-term distortion, gain, response, and tilt can be
measured.
Window
The window test pattern is comprised of a 2T pulse, a modulated 12.5T pulse and a
window bar.
The 2T pulse is used to measure short term distortion such as K2T, and transient
response such as KPB.
The modulated 12.5T pulse is used to evaluate chroma-to-luminance delay. When
viewed on a monitor, the bottom of the chroma envelope ideally appears as a flat
line. Group delay can distort the bottom of the envelope and, with the appropriate
waveform monitor graticule, can be measured.
The bar can be used to measure gain, and is also used to measure short-term dis-
tortion such as K
SD
and tilt such as K
BAR
.
Full Field Window
The window bar in this test pattern extends vertically for the full field.
Component Window
The component window test pattern has window bars added to the pattern. The
leading and trailing edges of the bars use T steps for both luminance and chromi-
nance edges. Since the sampling frequency for chrominance is half that of
luminance however, the chrominance rise time is half that of the luminance. The
window bar also has an inverted 2T pulse in its midpoint.
The amplitudes of the three components are: Y-3ACh, Cb-3C0h, and Cr-040h.
Window 100/20
These window test patterns can be used for color balancing video monitors.
Window 20 provides a centered window with a luminance level of exactly 20% of
full white. Your monitor manufacturer will have provided instructions on the use of
test patterns such as these.
5400-A5
Model 5400 Dual Sync Gen/Test Signal Generator