barcode reader java application Exam Tip in Software

Drawing QR Code JIS X 0510 in Software Exam Tip

Exam Tip
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Be aware that if the RFID equipment follows the RF emission regulations, the damage it can cause to a human body during operation and handling is not likely to be due to radiation but rather due to electric shock
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Objective 82
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Interrogation Zone Troubleshooting
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ollowing are common problems that you might encounter during system deployment Most problems will be generated by improper hardware and software setup in the IZs or by improperly tagged products Damage to hardware as well as tags themselves are also often causes for failures Let s look at some specific problem examples and troubleshooting techniques that will help you resolve these potential situations
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An infinite number of problems can be generated by a failure or improper setup of the IZ Following are some of the most common problems that you need to check and information about how to troubleshoot the problem
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No Reads
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The IZ doesn t show any reads although tagged product is going through the IZ What questions should you ask
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Are all the components powered on You should see various status lights blinking or turned on Check the interrogator lights, lights on the power supply, and lights on the peripherals If any of these lights are not illuminated when they should be, check to ensure that the connections are secure and check the condition of the cables Make sure everything is tight and properly secured, that cables are not bent more than they should be, and that the connectors are not damaged Is the reader configured properly Prior to the reader being able to read tags, several settings must be correctly configured according to the manufacturer and type of the reader Check the following:
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Is the world region set Some readers will not read tags until you set them up for the appropriate world region and country of operation These settings concern various performance restrictions around the world Is polling enabled Make sure that polling is enabled and set up for certain time intervals, continuous polling, or waiting for a trigger from an I/O device according to your needs The default setting may prevent the reader from polling (reading) for tags Are the correct tag protocols defined Is the reader set up for Electronic Product Code (EPC) Class 0 and Class 1, and do you need to read Gen 2 tags Or is the opposite required Is your reader set up for reading EPC tags, while you are running International Organization for Standardization (ISO) tags through your IZ Make sure that you set up your reader for the appropriate protocol Try to avoid choosing support for all protocols because that would slow down your read rates Use this only if you are truly reading all of the reader s supported protocols in your operation
CHAPTER 8 Testing and Troubleshooting
Are the antennas defined correctly in the reader Most readers usually automatically recognize which antennas are connected and automatically enable them However, if your reader drives the antennas for two or more IZs, verify that the appropriate antennas for that particular zone are enabled and set with correct output power settings Is the read/write function of the reader set Some readers can be set for read only, write only, or both, so make sure that the appropriate function is not disabled Is the network configuration set up correctly Your reader may read tags but, due to improper network configuration, you are not seeing the reads in your middleware or back-end system Make sure that the Dynamic Host Configuration Protocol (DHCP) is turned off or on, depending on the network If you are not using DHCP, you must use the appropriate IP address to communicate with the reader If you are using DHCP, the IP address will be dynamically assigned to the device by the network
Is the antenna orientation correct If using linear antennas and single dipole tags, ensure that the tags are parallel to the antennas
Can the antenna beam reach the tag Make sure that you have correct power settings for the antenna to ensure appropriate RF coverage of the IZ Can the tag be seen from all positions on the product With dense or RF-difficult products, you may need to angle the antenna or add additional antennas to ensure sufficient coverage of the IZ and the product to achieve reads Your tags might have been on the bottom of an RF-opaque product, for example, so antennas reading from the top couldn t reach the product
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