second polling command using the second modulation scheme on the carrier field typically according to a second protocol to provide the modulated carrier field upon expiration of the second time period this second modulation scheme is characterized by a second amplitude that is greater than the first amplitude at step 711 the first nfc device continues to provide the unmodulated carrier field for a third time period to detect any response to the second polling command at step 713 the first nfc device then ends the polling procedure and turns the carrier field off if it did not detect any devices fig8 illustrates a first polling procedure used by a first nfc device to poll for a second nfc device according to an exemplary embodiment of the invention a first nfc device 801 polls for a second nfc device 803 using a first polling procedure the first nfc device 801 and the second nfc device 803 may represent an exemplary embodiment of the first nfc device 102 and the second nfc device 104 respectively as shown in fig8 the first nfc device 801 generates the unmodulated carrier field 805 for a first time period to allow the second nfc device 803 sufficient time to derive or harvest sufficient power to communicate the first nfc device 801 modulates a polling command onto the unmodulated carrier field using a first modulation scheme to provide a modulated carrier field 807 the first nfc device 801 generates the unmodulated carrier field 809 for a second time period to allow the second nfc device 803 sufficient time to derive or harvest sufficient power to provide a response to the polling command in the exemplary embodiment as shown in.