
53
Noise Filter
If the background of printed bar code is white color, a noise tends to be generated easily during
scanning causing the error rate to increase. To reduce such the noise, the Noise Filter function is
available with the terminal. Two methods, software noise filter and ASIC noise filter, are
available. However, the ASIC noise filter has been set always effect by the system. Thus, it is not
possible for the user to reset it in the Read operation tab of Setting Scanner.
Table 2.48
Filter Description
Merit
Demerit
Software
noise filter
A software process removes noise. In
determining the blank at the leading edge
of the bar code, if there is a bar width
smaller than a certain value, it will be
bonded to the fore and aft data, the noise
eliminated and the determination made.
Also, the time in the range of 1 to 8
seconds from scanning to the time the
software filter initiates can be set. The
default is 3 seconds.
Effective when
scanning leading
edge blank of
bar code using
laser module
noted for easily
picking up noise.
If initial bar is
extremely thin, it
will be
determined as
noise and
eliminated,
which may mean
that the bar code
cannot be
scanned.
The functions of the Laser Scanner Library relevant to the Noise Filter are as follows.
OBRSetFilter
:
Sets up noise filter mode.
OBRGetFilter
:
Retrieves noise filter mode.
OBRSetFilterOnTimer
:
Sets up start time for noise filter.
OBRGetFilterOnTimer
:
Retrieves start time for noise filter.
Содержание IT-800 Series
Страница 15: ...15 2 1 4 Keys Keyboard Layout The following is the keyboard layout employed in the terminal Figure 2 1 ...
Страница 91: ...91 QR Code Enable 0 Min 1 Max 3500 Aztec Enable 0 Min 1 Max 3750 TLCode39 Enable 0 Code 32 Enable 0 ...
Страница 173: ...173 Copyrights Tab This tab is for displaying the OS copyright information Figure 3 19 ...
Страница 179: ...179 Root Tab Figure 3 27 Root certificates authenticate certificates received from other hosts ...
Страница 195: ...195 About Tab This tab displays current version information of the imager setting tool Figure 3 46 ...
Страница 201: ...201 Date Tab This tab is for setting display format of date Figure 3 56 ...
Страница 213: ...213 3 29 Windows Update This applet is used to keep the integrated operating system up to date Figure 3 74 ...
Страница 216: ...216 3 32 Domain Enrollment This applet is used to enroll the terminal to your company network Figure 3 78 ...
Страница 247: ...247 4 2 Games The terminal comes with two games Solitaire and Bubble Breaker Figure 4 2 ...
Страница 248: ...248 4 3 ActiveSync This application is an ActiveSync client program for the terminal to communicate with PC Figure 4 3 ...
Страница 255: ...255 4 5 Calculator The application can be used to operate nine digit calculator Figure 4 11 ...
Страница 261: ...261 2 On the child terminal the following screen appears while the child terminal is receiving data Figure 4 17 ...
Страница 264: ...264 4 11 Getting Started This application displays shortcut menus for setting up the terminal Figure 4 21 ...