1. Radio interference between radio stations
The frequency 2450 MHz band (2434.25 - 2465.75 MHz) used by the microwave RFID system V690 is designated for second-gen-
eration low-power data communication system (wireless LAN), local area radio station (a license required) for mobile object identi-
fication and specified low-power radio station (no license required) as well as industrial, scientific or medical equipment such as
microwave oven. Therefore, the radio interference is expected in such frequency band. Moreover, the cellular phone and personal
handyphone system (900 MHz - 1900 MHz) may generate the radio interference.
2. Possible trouble due to ratio interference
• Communication failure in RFID system
The radio wave from an ID tag to antenna is weak and, therefore, the communication between the antenna and ID tag may fail due
to radio interference caused by any other devices. Keep sufficient space between the RFID system and any other devices. For the
space, refer to Section 7-6.
• ID tag battery power loss
An electronic circuit in the ID tag is started by a radio wave of other device and the battery power may be consumed considerably.
V690 has a tag power-saving function (refer to Section 3-7) to control the battery power. Nevertheless, the battery power may be
still consumed depending on a working environment. So, keep sufficient space between the ID tag and any other devices. For the
space, refer to Section 7-6.
Notes on Interference to Second-Generation Low-Power Data Communication System (Wireless LAN), Cellular Phone, etc.
Second-generation low-power data communication system (wireless LAN)
Low-power data communication system
Mobile object identification (Microwave RFID)
Frequency band of
this product V690
Specified
frequency
band
♦
Communication failure in RFID system
♦
ID tag battery power loss
ID Tag
Antenna
Wireless LAN
ID Tag
Wireless LAN