Finding hidden RFIDs can be a challenging task.
RFID (Radio Frequency Identification) tags, also known as transponders, are microchips used in storing and transmitting data to RFID readers; they generally use four different frequency ranges. Tags come in two formats: active and passive. In the passive mode, the tag uses the energy received from the radio signal broadcast of the RFID reader to send a reply. The active mode tag uses an internal battery to broadcast a signal that reveals its presence. To detect the existence of nearby RFID tags requires a device with the ability to read these four frequencies.
Instructions
1. Locate the radio frequency direction finder in the general area of suspected RDIF tags.
2. Point the rotational antenna of the radio frequency direction finder towards the RFID tags and set the frequency range to the first setting on the RFID frequency chart (125 kHz to 140 KHz).
3. Set the radio frequency generator to broadcast in the frequency range of the first setting on the RFID frequency chart (125 kHz to 140 KHz).
4. Generate the frequency range on the RFID frequency chart (125 kHz to 140 KHz) waving the generator about 1 to 3 feet around and over the suspected RFID location.
5. Listen and watch the Radio frequency direction finder. If RFID tags are present, the radio frequency direction finder activates a tone or light signal showing that a RFID tag has been activated and returned a radio signal.
6. Repeat for all frequencies on the RFID frequency chart. For higher frequencies, the frequency generator should be about 5 to 10 feet from the suspected RFID tags.
Tags: direction finder, frequency chart, frequency direction, frequency direction finder, radio frequency, RFID frequency