Testing and Troubleshooting

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These questions are derived from the Self Test Software Practice Test for CompTIA’s RFID+ exam.

Objective: Testing and Troubleshooting
SubObjective: Given a scenario, troubleshoot RF interrogation zones

Multiple Answer, Multiple Choice

You are implementing an RFID-based tracking system in a warehouse. You install linear polarized antennas for interrogators on all the forklifts that are used to transport cartons in the warehouse.

On which side should you place tags on cartons to achieve an optimum read rate?

1. on the left side of cartons
2. on the right side of cartons
3. on both the left and right sides of cartons
4. on the top of cartons

Answer:

A. on the left side of cartons

B. on the right side of cartons

Tutorial:

You should place tags either on the left side or on the right side of cartons. In an RFID-based tracking system in which interrogators are installed on forklifts, it is recommended that you tag the cartons either on the left side or on the right side. A forklift-mounted interrogator typically uses high frequency (HF) and ultra high frequency (UHF) systems. The read range for an HF system and an UHF system are 1 meter and 3 meters, respectively. In addition, when using linear polarized antennas, tag orientation is an important concern. Therefore, the tags should be placed on either the left or the right side of a carton.

You should not place tags on both the left and right sides of cartons. Interrogators read both the tags, and tag data will be duplicated on the system. It is always recommended that you place one tag per item, object, or carton for RFID forklift systems.

You should not place tags on the top of cartons. Placing tags on the top of cartons will not align tags with the interrogator antennas. Tags should be vertically aligned if you are using linear tags and linear interrogator antennas that are oriented vertically. If the linear interrogator antennas are oriented vertically and tags horizontally, tags will not be read by the interrogator. Therefore, you should not place tags on the top of cartons.

Reference:

RFID Essentials, Chapter 1: An Introduction to RFID, Implementation, p. 14.

ACSISInc.com, Lessons from the Front Line, http://www.acsisinc.com/pdf/whtpaper/RFID%20Lessons%20from%20the%20frontline.pdf

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