[HELP] C/N - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Equipment & Tools From test equipment to hand tools

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
Thread Tools Search this Thread
Old 12th October 2011, 01:47 AM   #1
diyAudio Member
Join Date: Oct 2011
Default [HELP] C/N

im research how to measure carrier to noise (C/N) in CATV and i searched google to find example project. Most of the projects use spectrum analyzer (SA) to analysis broad band signals. I searched spectrum analyzer in this 4rum and really speaking, i dont find project using microcontroller (AVR, PIC or 8051) do this work although there are many projects deal with a question, most of them really hard to execute. Broad band signal how does microcontroller processes?
So, i post this thread to ask you this question for help.
  Reply With Quote
Old 13th October 2011, 07:02 PM   #2
diyAudio Member
Join Date: Mar 2004
Location: Budapest, Hungary
The microcontroller only controls the analog circuitry (VCO, filters etc) and the display.
  Reply With Quote
Old 13th October 2011, 08:57 PM   #3
diyAudio Member
Join Date: Oct 2011
Direct measurement with microcontrollers/DSP's requires a pretty fast ADC, so as oshifis said, usually its a combination of specific analogue circuits/filters and a microcontroller, which simply determines how the analogue parts behave, as well as measure the voltages from them.

For a complete all-digital spectrum analyser in the >1MHz range, even a 32-bit ARM7 would struggle, whic is why they often use DSP's, or for ultra high speed, FPGA's. PIC's/AVRs as cool as they are, are not designed for heavy DSP (but they can do it with some clever code). They're microcontrollers, for control of IO, and peripherals, not processors per se
  Reply With Quote
Old 14th October 2011, 01:08 AM   #4
diyAudio Member
Join Date: Oct 2011
If i use dsPIC? can do with broad band?
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

New To Site? Need Help?

All times are GMT. The time now is 02:28 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2