Go Back   Home > Forums > >

Measurement data and techniques for Elvee's De-Noizator: all implementations
Measurement data and techniques for Elvee's De-Noizator: all implementations
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools
Old 27th February 2021, 03:35 PM   #51
jackinnj is offline jackinnj  United States
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Measurement data and techniques for Elvee's De-Noizator: all implementations
Quote:
Originally Posted by gerhard View Post
No. The input impedance is the 10K of the bias resistor plus the input
impedance of the 20 op amps.
My bad! Sorry Gerhard.

I re-read your 220pV/RtHz article and Zin is specified in a table.
  Reply With Quote
Old Yesterday, 11:36 PM   #52
RickRay is offline RickRay  United States
diyAudio Member
 
Join Date: Jan 2014
Location: Kansas
Measurement data and techniques for Elvee's De-Noizator: all implementations
Default Calibration in ARTA

Anyone here familiar with the calibration procedure in ARTA? I have a signal generator and am able to input 1vrms into the correct channel and perform the calibration process. When I do this, the graphs produced by ARTA directly display the correct values, for example a 1k resistor connected to the input of an LNA measure approx. -168dBV/sqrtHz and a 1 volt rms signal displays as 0dbV. What does the input sensitivity number that ARTA represent? ARTA calculated 4369.21mV when I input 1Vrms. I do not know if the number determined by ARTA is peak or p-p.
  Reply With Quote
Old Today, 12:00 AM   #53
Trileru is offline Trileru  Romania
diyAudio Member
 
Join Date: Dec 2010
Would like to understand this as well. So far I've used a value for input_sensitivity which when measuring the noise of a 1k resistor, the value in dBV/sqrtHz that it shows translates correctly applied to the input_sensitivity value (which I consider 0dB point) I have in ARTA.
ARTA manual shows that the dBV values are calculated based on the input_sensitivity value and preamp gain setting.
  Reply to this post

Reply


Measurement data and techniques for Elvee's De-Noizator: all implementationsHide this!Advertise here!
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
D-Noizator: a magic active noise canceller to retrofit & upgrade any 317-based V.Reg. Elvee Power Supplies 2094 Yesterday 08:37 PM
FS: CLEARANCE: Various PCBs - Headphone Amplifiers / D-Noizator (EU Only) FREE UK P&P iamwhoiam Swap Meet 18 5th August 2020 11:21 AM
Soekris' DAC implementations Eldam Digital Line Level 1285 27th May 2020 10:42 AM
Practical Implementations of Alternative Post-DAC Filtering Joe Rasmussen Digital Source 991 14th October 2015 01:11 AM
Sabre DAC implementations SunRa Digital Line Level 1 18th December 2010 05:35 PM


New To Site? Need Help?

All times are GMT. The time now is 11:08 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki