Zebra Technologies radio frequency identification (rfid) ユーザーズマニュアル

Introduction to RFID
Radio Frequency Interference

58978L-008 Rev. A

RFID Programming Guide

11/14/2008

Radio Frequency (RF) interference can be caused by many sources. This interference can 
affect RFID performance by limiting the range of the RFID tags or preventing reading/writing 
to the tags.

•

Foil and metal-based media should not be used for RFID applications. Metal reflects radio 
frequency signals and is a leading source of RF interference. 

•

Water and other liquids can absorb RF signals. Some media adhesives and label materials 
can be unexpected sources of liquids that cause performance problems.

•

Other RF equipment can cause interference if the equipment is positioned too close 
together. Allow sufficient physical space between the RFID printer and other RF products 
that share the same bandwidth (such as antennas, readers, wireless LANs, or other RFID 
printer/encoders).

Each RFID label has memory that can be read and most have memory that can be written to 
through Zebra Programming Language (ZPL) commands. Use ZPL to read and write to 
(encode) RFID labels just as you would use ZPL to print data on the labels. You can use 
serialized fields, field variables, and any other ZPL features (such as the command 

 to return the results to a host computer).

RFID-specific ZPL commands are described in 

. For 

examples of how to use the ZPL commands, see 

For more information about non-RFID ZPL commands and how to use them, refer to the 
ZPL II Programming Guide. A copy is available online at 

Your RFID printer is able to use Set/Get/Do (SGD) commands just as it does ZPL commands. 
Many ZPL commands have equivalent SGD commands. Usually, you will need to run one 
SGD command for each parameter in the corresponding ZPL command. RFID-specific SGD 
commands are described in 

For more information about non-RFID SGD commands and how to use them, refer to the 
ZPL II Programming Guide. A copy is available online at