where G is the antenna Gain expressed in dBi (for linear antennas) or dBic (for circular antennas) and L the cable attenuation expressed in dB.
|A528||Yes||tenth of dBm||starting from firmware release 3.0.0 *|
|R1230CB||Yes||tenth of dBm||starting from firmware release 1.5.0|
|R1260I||Yes||tenth of dBm||starting from firmware release 1.5.0|
|R1240I||Yes||tenth of dBm||starting from firmware release 1.0.0|
|R4300P||Yes||tenth of dBm||starting from firmware release 1.0.0|
|A941EU||: 60 mW - 1.5 W programmable in 256 steps (for both IP65 and OEM version)|
|A528||: 10 mW - 500mW programmable in 8 steps|
|R1230CB||: 8 mW - 200 mW programmable in 15 steps|
|R4300P||: 50 mW - 1.5 W (EU) or 1 W (FCC) programmable|
|R1260I||: 16 mW ERP - 400 mW ERP programmable in 15 steps|
Each bit set to 1 in the MASK field allows you to write the bit of the corresponding ACTION FIELD (for example if you set to 1 the bit 19 of the KILL MASK you will be able to write to 0 or 1 the bit 9 of the KILL ACTION field); each bit set to 0 in the MASK field masks the write operation in the corresponding ACTION FIELD. The two bits of the EPC, TID and USER ACTION field mean the following:
For example, if you are using a payload value of 0x0C030, this should permanently prevent of writing the EPC code. In the case of tags that implement the USER memory, the value 0x00C02 will make the USER memory writeable only from the secured state but not from the open state.
Another example: the payload value 0xC0200 makes the KILL memory word not readable nor writeable from the open state, while you can read or write it from the SECURE state.
A tag that has the ACCESS word memory set to 0x00000000 (default condition) is always in the secured state and cannot be killed. For further details on the protect/locking features of Gen2 protocol please take a look in the Gen2 protocol specification (starting from chapter 6) available at http://www.gs1.org/epcglobal.