Datalogic Matrix 120 - Reading Diagrams

Reading Diagrams
Product Reference Guide 83
Reading Diagrams
• The following reading diagrams are to be considered as references and are
given for typical performance at 25°C using high quality grade A symbols:
Code 128 (1D code) and Data Matrix ECC 200 (2D code) from the Test
Charts available in the SW-DOCS-TEST CHARTS accessory (93ACC0148).
• Testing should be performed with the actual Matrix 120 using application
codes in order to evaluate whether maximizing application performance
requires adjustments to the HW/SW configuration with respect to the Refer
-
ence Conditions given under each diagram.
• The ratio of the Vertical FOV width with respect to the Horizontal FOV width
in the diagrams depends on the models:
- for WVGA it is about equal to 0.64; specifically 480/752. (e.e. FOVV. 
FOVH x 0.64);
- for MP it is about equal to 0.75; specifically 960/1280. (e.e. FOVV. 
FOVH x 0.75).
• The reading distance ranges are measured from the reading window sur-
face.
• Common software parameter settings:
- reading all 1D code symbologies - Processing Mode=Standard;
- reading 2D code symbologies - Processing Mode=Standard; Code
Contrast=Low; Decoding Complexity=Medium.
• When defining a HW/SW configuration for the Matrix 120 for conditions dif-
ferent from those of the reference diagrams, it is suggested to keep in mind
the following rules:
- Changes in Exposure Time act directly proportional to the lumi-
nosity of the image and inversely proportional to the maximum code
reading movement speed. Consequently, reducing the
Exposure
Time
by half reduces the luminosity of the image by half but doubles
the theoretical code reading movement speed.
- Changes in Gain act directly proportional to the luminosity of the
image. However, increasing the
Gain value can reduce the quality of
the acquired image.
• The max. theoretical Line Speed values for each diagram can be calculated
using the formula in
Chapter 6, Maximum Line Speed and Exposure Time
Calculations.