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viola
Associate III
May 14, 2025
Solved

STM32WLE5 Max allowed power on RFO_HP pin

  • May 14, 2025
  • 2 replies
  • 365 views

Hi ,

when the SUBGHZ block is in TX mode. 

if , for example , the COAX cable connected to the board SMA connector is suddenly disconnected during RF TX transmission .

what is the maximum allowed input power on the RFO_HP pin when operating in TX mode ? (due to Reflected RF power occurring from the suddenly disconnected cable)

 

thank you

viola

 

Best answer by STTwo-32

Hello @viola 

the maximum VSWR is 10:1, from this you can calculate the value you want, starting from your Pout:

If Pout = 16 dBm, max reflected power is 14.27 dBm,

if Pout = 22 dBm, max reflected power is 20.25 dBm.

Best Regards.

STTwo-32

 

2 replies

STTwo-32
STTwo-32Answer
Technical Moderator
May 27, 2025

Hello @viola 

the maximum VSWR is 10:1, from this you can calculate the value you want, starting from your Pout:

If Pout = 16 dBm, max reflected power is 14.27 dBm,

if Pout = 22 dBm, max reflected power is 20.25 dBm.

Best Regards.

STTwo-32

 

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V
violaAuthor
Associate III
May 27, 2025

Hi STTwo-32 ,

 

Thank you very much!

 

Viola

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