How to check Gain with ModelSim-ASE (FIR Compiler)

Hi Dave,

Thank you for reply, I understood "I should reduce taps, and reduce bit-growth", "I should edit coefficients, and reduce sun(abs(h[n]))", and so on.

Excuse me, may I addition question?

If I designed to maximize the dynamic range, how to calucurate gain?

I think that input.txt and output.txt is voltage.

example

input bits : 8bit

input data : 100 ~ -100

bit-growth : 6.6 (log2(100))

output bits : 15bit

output data at one point : 25500 (sum of 100 0xFF values)

The following calculations correct?

Gain = 10 log (Vin / Vout)^2 = 10 log (100 / 25500)^2 = 48dB

It seems to be amplified.

or

I should convert out put max range into input data range (100 ~ -100) by user logic?

Thanks,

jas39