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Chapter 3
28
Chapter 3
29
Application Notes
Tips for Achieving High Throughput
In some applications your primary objective may be to achieve the highest possible
throughput rate. The following list identies the parameters and imager settings that
can maximize scanning and decode throughput speed. Note, by emphasizing maximum
throughput, other areas of performance may be affected. For example, the number of non-
reads could increase.
If high throughput is critical, consider some or all of these settings:
• Only enable those symbologies that you will be decoding.
• Eliminate all sufxes and prexes.
• Minimize the number of redundant reads required before transmitting data.
• Transmit the decoded data at the highest baud rate, 115,200 baud.
• Disable buzzer functions.
Tips for Insuring Highest Data Integrity
There are several parameters that can enhance your condence that the correct bar code
data is transmitted. Note that by emphasizing the accuracy and security of the data other
areas of the imager operation may be affected, for example, you may not achieve the
highest throughput.
If accuracy and data integrity are critical, consider some or all of these settings:
• Program the imager to higher Decode Time. For example, program the imager
to decode a bar code exactly the same way with Extra Long Decode Time before
transmitting the data. The default settings for the LH2 are designed for optimal,
general purpose performance with good quality symbols on typical surfaces. For
poor quality barcodes or barcodes on non-standard surfaces (shiny, low-contrast),
the unit may require more time to process the barcode before the system abandons
the image and restarts on a new decode attempt. It may require manipulating LED’s
too.
• The quality of the printed bar code must be excellent.
• Do not use a symbology with poor internal verication, or subject to partial
decodes, such as 2 of 5 or MSI/Plessey.
• Only enable those symbologies that you will be decoding.
• Transmit data at low baud rates to minimize communication errors.