Tuning; Transmission Power Tuning - Omron V780 Series User Manual

6 Functions
6-8

Tuning

6-8-1

Transmission Power Tuning

Outline
You can measure the transmission power that is required for the Reader/Writer to communicate with
an RF Tag and then adjust the transmission power.
You can set the optimum transmission power for communications with target RF Tags, i.e., the mini-
mum required power. You can use this to prevent communicating with RF Tags you do not want to
communicate with or to suppress interference with other Reader/Writers, and thereby achieve more
stable RFID system operation.
Reader/Writer
You can use the Transmission Power Tuning View on the Web browser interface to adjust the trans-
mission power settings separately for reading and writing. When you adjust these settings from the
Web browser interface, use the actual RF Tags at the same communications distance as the appli-
cation. When the Reader/Writer is adjusted, it sweeps through the range of transmission powers
and measures the communications status while actually reading and writing data in the RF Tag.
Finally, the measurement results are used to provide information on the optimum transmission
power.
Computer
6 - 42
Optimum Overly strong
transmission power transmission power
Target RF Tag Non-target RF Tag
Reader/Writer
Communications distance
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Insufficient
Optimum
power to send
transmission power
Excessive
transmission
power
RF Tag