Design Con 2015
Breaking News
Design How-To

Hunting noise sources in wireless embedded systems

10/25/2011 02:31 PM EDT
6 comments
NO RATINGS
More Related Links
View Comments: Newest First | Oldest First | Threaded View
eembedded_janitor
User Rank
Rookie
re: Hunting noise sources in wireless embedded systems
eembedded_janitor   11/4/2011 12:17:06 AM
NO RATINGS
Of course nearby wireless systems can cause problems. Other environmental factors too. When you test an RF design (or any design for that matter) it is very important to try it outside the protected environment of the lab. Does the product get hosed or lose sensitivity if you go to the mall/club surrounded by hundreds of cellphones? Does it get degraded by a florescent lighting, etc etc etc I live in a rural area and one big interference source here is electric fencing. That can render some devices pretty much inoperable.

Luis Sanchez
User Rank
Rookie
re: Hunting noise sources in wireless embedded systems
Luis Sanchez   10/28/2011 12:09:35 AM
NO RATINGS
Does somebody out there which RF wireless technologies are less susceptible to SMPS noise? I suppose the higher the frequency band the further away it will be from the noise that the power supply might generate... I think 2.4GHz band is good for not being affected by the SMPS. I think this is of the order of hundreds of kilo-hertz right?

sharps_eng
User Rank
Rookie
re: Hunting noise sources in wireless embedded systems
sharps_eng   10/26/2011 6:23:23 PM
NO RATINGS
Does this scope have different-scale timebases for different inputs? For instance, correlating sporadic noise spikes against data corruption?

Sanjib.A
User Rank
CEO
re: Hunting noise sources in wireless embedded systems
Sanjib.A   10/26/2011 3:51:47 PM
NO RATINGS
Finding a noise source after the problem has occurs is no doubt the most difficult part. As a preventive measure it is always worth to be overcautious during the design phase, by proactively identifying the risk areas (such as SMPS, highspeed digital circuit etc) and then by keeping provision for more than sufficient filtering. It is also required paying enough time in reviewing the board layout and taking preventive measurements in layout design.

t.alex
User Rank
Rookie
re: Hunting noise sources in wireless embedded systems
t.alex   10/26/2011 2:02:22 PM
NO RATINGS
Is it possible noise source can come from other nearby wireless systems?

apummer945
User Rank
Rookie
re: Hunting noise sources in wireless embedded systems
apummer945   10/26/2011 12:20:07 PM
NO RATINGS
that is a trade off, you could get a simpler, cheaper system by integrating RF and digital circuits, but you get what you paid for; more noise, less sensitivity, additionally the system is very sensitive to any changes within the tolerances of the production, physic is physic you can not go around it.

Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Top Comments of the Week