Product Introduction

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The TE179 is designed to measure fregistration of video cameras.
 
The circuit arrangement of the measurement shall be as shown in fig. 2.
 
If light is possible the conditions of shooting shall be as follows
 
• The light density of the transparency version shall be 939 cd/m² +/- 5% (=2000 lx) at peak white
 
• The correlated color temperature of the light source shall be 3200 K +/- 100 K
 
• The white balance shall be set manually or automatically to 3200 K +/- 100 K
 
• The test chart shall be shot by the camera so that the frame limited by the arrows exactly coincides with the edges of the picture displayed on the monitor in underscan mode
• The focus control shall be in auto or manual mode and shall be in best focus
 
• The iris control shall be in auto or manual mode
 
• Black level corrector „ON“
 
• Flare corrector „ON“
• Black balanced with lens capped at 35mV level
 
• White balanced using the illuminator with 100% white chart at 382 cd/m² (= 1200 lx)
 
• Color matrixing corrector „OFF“
 
• Contour corrector „OFF“
 
• Noise reducer „OFF“
 
• Aperture corrector „OFF“
• Black and white shading corrector „ON“ and optimized
 
• Gamma corrector set to „1“
 
• Gain control shall be set to „0 dB“
 
• Optical filter, if any, shall be set to „open“ position
• The iris shall be adjusted to attain the G-channel signal level of 70% of the nominal signal level.
 
• A horizontal line which crosses each “V“ mark shall be selected and timing offsets against G-channel signal, a, a´-b, b´,as shown in fig. 3, shall be measured of R-channel and B-channel signals, respectively

 
Horizontal and vertical displacements, H and V, shall be calculated by the following equations
 
H = (A+B) / 2
 
V = (A-B) / 2
 
where A = (a+a´) / 2 and B = (b+b`) / 2
 
 
This measurments shall be conducted for each five horizontal lines which cross over the marks.
 
Horizontal and vertical registration errors, R_H, R_V, shall be calculated as in:
 
R_H  = ( H/Hr) x (4/3)
R_V  = ( V/Hr) x (4/3)
 
where Hr is the horizontal sweep time
 
Presentation of the results
 
The maximum horizontal and vertical registratin errors RHmax ,RVmax in precentage shall be reported together with teir positions as in column number-row number. The minus signal shall precede the reported figures in case that R-channel and B-channel signal lead the G-channel signal. The plus sign shall be applied for the opposite case, as exempliefied for the case depicted in fig.3.
 
R_Hmax  = + 0,12 % at 1 - 5
R_Vmax = + 0,11 % at 5 - 1
 
The specification of the lens and its focal length shall also be reported.
 
Extraction of registration errors