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STM32WLE5 Max allowed power on RFO_HP pin

viola
Associate III

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

 

1 ACCEPTED SOLUTION

Accepted Solutions
STTwo-32
ST Employee

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

 

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

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2 REPLIES 2
STTwo-32
ST Employee

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

 

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

viola
Associate III

Hi STTwo-32 ,

 

Thank you very much!

 

Viola