util_tx_continuius TX power level control

[hamersin]

What is the best way to lower the TX output of the util_tx_continuous command? I am trying to lower it by about 2db.

The command I am currently using is:
util_tx_continuous -f 923.3 --mod LORA --sf 7 --bw 500

I see that there are a couple of flags, but I am unsure as to what they actually do, and what their default values are.

--dig Digital gain trim
--mix Radio Tx mixer gain trim
--pa PA gain trim

[nestorayuso]

You need a calibration table for your board, If you are using the semtech 868MHz reference board you can use this:

https://github.com/Lora-net/packet_forwarder/blob/master/lora_pkt_fwd/global_conf.json#L133-L139

For example, if you want a RF power of +10dBm, you need to set:
--dig Digital gain trim to 0
--mix Radio Tx mixer gain trim to 12
--pa PA gain trim to 1

more tables for different PCBs here:
https://github.com/Lora-net/packet_forwarder/tree/master/lora_pkt_fwd/cfg

[rbaldwin13]

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