AWR1843BOOST: About TxOutPowerBackOffcode

Hiroyuki Kanematu

Part Number: AWR1843BOOST

Hello, xWR1xxx series can adjust each transmitter from 0 to 20 with txOutPowerBackOffCode described in line 689 of SDK C: \ ti \ mmwave_sdk_03_05_00_04 \ packages \ ti \ control \ mmwavelink \ include \ rl_sensor.h. It is written so that it can be done.

The question here is that if you set the maximum value of 20, the transmission power will be larger than 12 dBm, so the transmission power will be 0.

How does that correspond?

over 3 years ago

+1 Ishita Kochar over 3 years ago

TI__Mastermind 31680 points

Hello Hiroyuki,

Let me clarify the concept of TX Output Power backoff first. This is used to reduce the Tx O/P power from the maximum value. Default value (i.ee 0dB backoff) gives around 12dBm Tx o/p. Using the backoff of 1dB, for example, reduces the TX o/p by 1dB i.e. 11dB and so on. If you are using 0dB backoff then that is the max o/p you can get.

If you program 20dB backoff, the TX O/P power will be negative i.e. 12-20 = -8dBm

Hope that makes sense.

Regards,

Ishita

0 Hiroyuki Kanematu over 3 years ago in reply to Ishita Kochar

Expert 2975 points

Hello, Ishita.

Thank you for answering the question.
In other words, if the backoff value is a (a is a variable), the current output from the transmitting antenna will be as follows, right?

(Power from transmitting antenna) = 12 --a

I'm sorry it's been long.

0 Ishita Kochar over 3 years ago in reply to Hiroyuki Kanematu

TI__Mastermind 31680 points

Hello Hirouki,

Hiroyuki Kanematu said:
(Power from transmitting antenna) = 12 --a

The power from the TX antenna will be 12 - a. 12dBm will be the maximum O/P power and as the backoff increases, the TX O/P power decreses.

Regards,

Ishita

0 Hiroyuki Kanematu over 3 years ago in reply to Ishita Kochar

Expert 2975 points

Hello, Ishita

Thank you for your prompt response.
After all, my formula is fine, right?

(postscript)
(Power from transmitting antenna) means TX O / P, right?

0 Ishita Kochar over 3 years ago in reply to Hiroyuki Kanematu

TI__Mastermind 31680 points

Hello Hirouki,

Yes, power from transmitting antenna means TX O/P.

And I mentioned the formula again since I saw two negative signs in yours, so I just wanted to clarify.

Regards,

Ishita

0 Hiroyuki Kanematu over 3 years ago in reply to Ishita Kochar

Expert 2975 points

Hello, Ishita

(You said)
> And I mentioned the formula again since I saw two negative

> signs in yours, so I just wanted to clarify.

I'm sorry to complicate the story.
Also, thank you for your polite commentary.

0 Ishita Kochar over 3 years ago in reply to Hiroyuki Kanematu

TI__Mastermind 31680 points

Hi Hiroyuki,

No issues!

Glad you were able to get the resolution for your concern.

Have a good day and rest of the week!

Regards,

Ishita

0 Hiroyuki Kanematu over 3 years ago in reply to Ishita Kochar

Expert 2975 points

Thank you!

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AWR1843BOOST: About TxOutPowerBackOffcode