Search found 5 matches
- Tue Jul 22, 2014 2:24 pm
- Forum: Algorithm development
- Topic: About Decimation
- Replies: 1
- Views: 4717
About Decimation
Hello, i wrote a simple routine to perform decimation on samples, and i placed a 1 pole LPFs ahead to prevent aliasing but i'm not able to completly get rid of high freqencies ringing cause the slope of 1st order could be too low. I could probably resolve this by analog conditioning at the input sid...
- Sat Jul 19, 2014 1:49 am
- Forum: FV-1 hardware questions
- Topic: Hiss on brand new EVAL board
- Replies: 5
- Views: 7208
Ok i did some test with in/out gain and the noise drops to acceptable levels. With my strat if i hit hard on the low E i can get 2-3V peak which is two times the max input of the FV-1... Need for smart gain here My goal, before i even start to write a single instruction on this device, is to retain ...
- Sat Jul 19, 2014 12:29 am
- Forum: FV-1 hardware questions
- Topic: Hiss on brand new EVAL board
- Replies: 5
- Views: 7208
The signal path is very easy: guitar-->buffer-->fv-1 board-->buffer-->amp I am driving the ADC input with guitar level which is too cold but i expected little less output noise. This morning i will adjust the in/out gain to match the ADC full scale. If the noise comes from the A/DAC i should get som...
- Fri Jul 18, 2014 10:48 am
- Forum: FV-1 hardware questions
- Topic: Hiss on brand new EVAL board
- Replies: 5
- Views: 7208
I have put the scope at the FV-1 output and it shows 10mVpp noise with or without grounded inputs. Looking at the FFT it shows that the noise level is full band. I tried to power it with 9V Battery, same thing. I have to assume that the noise comes straight from the FV-1. How can you use such a thin...
- Thu Jul 17, 2014 12:54 pm
- Forum: FV-1 hardware questions
- Topic: Hiss on brand new EVAL board
- Replies: 5
- Views: 7208
Hiss on brand new EVAL board
Hi everyone! I just got my fv-1 eval board but i find there is too much "hiss" type of noise. It's not PSU related cause i supply it with dedicated PSU; it's not a 100Hz hum, it sounds like a "shhhhhhh". :) I tryed putting a buffer pedal on the input, on the output, tryed to grou...