https://devzone.nordicsemi.com/f/nordic-q-a/73082/tx-and-rx-max-pulse-duration-for-zigbee-protocolDear Nordic Team, We are using nRF52840 based module and using its ZigBee Radio. For one certification purpose, we need to know the max. pulse time (duration) for Tx and Rx single pulse. Consider max. the payload for Zigbee and max. RF power - 8dBmen-USTelligent Community 13Tue, 23 Mar 2021 13:58:41 GMThttps://devzone.nordicsemi.com/thread/301457?ContentTypeID=1Tue, 23 Mar 2021 13:58:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ab1197a8-9f42-40f0-9f97-577171cd6319ketiljo<p>Less than 20 µs will be hard and virtually impossible. There is usually a relationship between output power and pulse time, so then the output power is low, the pulse time can be longer.&nbsp;</p> <p>A standard 802.15.4 Zigbee packet is 127 bytes at 250 kbps. This takes ~4 ms to transmit.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/301288?ContentTypeID=1Mon, 22 Mar 2021 17:50:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1128474b-0aad-4ba5-a933-bee5bd4431d7Rahul<p>Just FYI, we have to get the device certified for IEC Ex/ATEX Ex ia (Zone 0 Hazardous location) and as per IEC60079-0, the max. RF pulse duration (in air) should be less than 20uS and power should not exceed 2W.&nbsp;</p> <p>For power, we are well within the limits but for the period it is a concern. Probably due to this reason, we may not consider 100% duty cycle.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/301286?ContentTypeID=1Mon, 22 Mar 2021 17:45:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:069c4d3c-a5aa-44bb-b631-16d11a4e96c9Rahul[quote userid="2125" url="~/f/nordic-q-a/73082/tx-and-rx-max-pulse-duration-for-zigbee-protocol/301196#301196"]Maximum TX duty cycle for the TX is ~60%. But you will make is easier by stating 100% to avoid any duty cycle restrictions.&nbsp;[/quote] <p>Is there any reference document where this is mentioned? We need to provide evidence from the manufacturer to our certification agency.&nbsp;</p> <p>Also, is this ~60% duty cycle configurable? If yes, how?&nbsp;&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/301196?ContentTypeID=1Mon, 22 Mar 2021 12:42:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c25fd76b-04a6-4d47-a63b-c2dfacd0087eketiljo<p>Maximum TX duty cycle for the TX is ~60%. But you will make is easier by stating 100% to avoid any duty cycle restrictions.&nbsp;&nbsp;</p> <p>You can find the TX current draw numbers in the PS:&nbsp;&nbsp;<a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/radio.html#unique_737946918">https://infocenter.nordicsemi.com/topic/ps_nrf52840/radio.html#unique_737946918</a></p><div style="clear:both;"></div>