About RF Gain and Rx Gain

Thank you for your reply.

> The total RX gain is the sum of the RF gain and the IF amplifier gain.
Can you tell us about RF gain and IF amplifier gain?

> The RF gain target allows the user to control the RF gain independently of the total RX gain, giving the user the flexibility to trade off linearity and noise figure.

What are the linearity and noise figure respectively?
Also, what happens to the linearity and noise figure by lowering the RF gain?

Hi, I'm trying to make a program for AWR1843 using SDK.

RX Gain and RF Gain Target can be changed in mmWave Studio.
(Maybe I'm changing the RF gain and RX gain respectively)

The SDK states that only RX Gain can be changed in the documentation and TI's Radar Programming Model.
Moreover, it says that the RX gain is fixed at 30 dB.

Here is the question at last. (About SDK)
1. RX gain
Is it possible to change the RX gain?

2. Is there a data structure where the RF gain can be changed independently?

Thank you for your help.

By the way？

I would like you to answer the following questions as well.

RX Gain and RF Gain Target can be changed in mmWave Studio.
(Maybe I'm changing the RF gain and RX gain respectively)

The SDK states that only RX Gain can be changed in the documentation and TI's Radar Programming Model.
Moreover, it says that the RX gain is fixed at 30 dB.

Here is the question at last. (About SDK)
1. RX gain
Is it possible to change the RX gain?

2. Is there a data structure where the RF gain can be changed independently?

Hello, Ishita

> The SDK states that only RX gain can be changed in the documentation and TI's radar >programming model.
>Also, the RX gain is fixed at 30dB.

Please refer to the link below.

file: /// C: / ti / mmwave_sdk_03_05_00_04 / packages / ti / control / mmwavelink / docs / doxygen / html / structrl_profile_cfg__t.html

The following is a reference to the RX gain literature.
b5: 0 Code for Rx VGA gain
1 LSB = 1 dB
Valid values: For xWR1xxx: all even values from 24 to 52 For xWR6x43: all even values from 30 to 48 b7: 6 Code for RF gain target (Not applicable for IWR6843 ES1.0,
RF gain is fixed to 34dB).
For xWR1243 / xWR1443 / xWR1642 / xWR1843: 00 --30 dB
01 --34 dB
10 --RESERVED
11-26 dB
For xWR6843 ES 2.0: 00 -30 dB
01 --33 dB
10 --36 dB
11 --RESERVED
b15: 8 RESERVED
In IWR6843 ES1.0 device, Rx Gain is not accurate and not calibrated.
The RF gain is 34dB and total Rx gain can be varied from 28dB to 56dB

Hi Hiroyuki,

I am not sure if you have a follow up question here. Can I consider this resolved, or is there something you need more information on?

Regards,

Aayush

Hello, Aayush
Shouldn't we talk about programmatic gain setting here?

Hi, Aayush.

Thank you!