Hi,

I have a question about the RXVGA1(mixer gain) of LMS6002D.

In “FAQ_v1.0r12.pdf”, page10 5.20, there is a formula for converting VGA1 code to dB, the formula is

G[dB] = 20*log10(127/(127-Code)), 0 <= Code <= 120.

In this formula the maximum of G is 25.174dB.

But in another document, “LMS6002Dr2-Programming and Calibration Guide-1_1r2.pdf”, Chapter “2.8 RX FE Modules Configuration”, page41.

The RFB_TIA_RXFE[6:0] has the mixer gain = 30dB if RFB_TIA_RXFE is 120(0x78).

Are these two parameters the same, or how to calculate the value in dB of rxvga1.

Thanks for your response.