About AWR1843 VGA Gain setting

Thank you for your reply.

From your recommended Forum, it seems that the VGA Gain setting will continue to be fixed after being set programmatically.

I have a question when using mmWave Studio.

RX Gain = RF Gain + VGA Gain
I think that the formula holds, but in mmWave Studio, there is an item to set RX Gain and RF Gain Target.

I wondered, does the RX Gain item directly refer to the VGA Gain value in mmWave Studio?
Or does it represent the sum of RF Gain and VGA Gain?

Hello

Is it okay to think that in Studio the VGA is adjusted so that the difference between the RX gain value and the actually received chirp wave intensity is the VGA gain value?

After all, you can't change VGA directly in Studio, right?

If RX Gain is set to 24 dB and RF Gain Target is set to 30 dB in mmWave Studio, the VGA Gain side will try to adjust to a negative value. Is that okay?

VGA Gain = 24-30

I don't think so.

Let me check with design team and get back to you

thank you

Cesar

Hello, thank you for your answer

What kind of calculation do you use to calculate RF gain and VGA gain?

Hi,

Since RF Gain Target is set to 30 dB, this means that there is enough RF gain to reach the total Rx Gain of 24dB

There is no need for gain on the VGA side

I will confirm this with design team and get back to you

thany you

Cesar

In other words, consider the case where the RF Gain Target is set to 26 dB. If you receive the RX Gain as 30 dB, the VGA Gain will be 4 dB, right? (It's bad again, but the idea is that the SDK's VGAGain sets the gain of the VGA side amplifier, isn't it?)

Hi, Thank you for your answering!