Sean,
I am assuming that you want to sample the noise in the RF frequency band. You can use the RSSI signal from the CC1000 radio chip to get a good idea of what the noise level is at. This signal is a current output that is connected to gnd across a resistor (and capacitor for filtering), so that the mote can sample the signal as a voltage. You may want to checkout the CC1000 datasheet as well as whatever xbow says about it. Simply sample this channel (as far as you can) to record the signal level as measured by the radio chip. What I have done to gauge the noise (using Tmote Sky motes) is to read the RSSI register from the CC2420 (not an analog signal) and then send the data to a host computer across the UART. Performing this simple testing outdoors and indoors makes it clear very quickly why the radios tend to perform better outdoors.
Regards,
Matt
[EMAIL PROTECTED] wrote: -----To: [email protected]
From: Sean Casey <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
Date: 06/12/2006 10:38PM
Subject: [Tinyos-help] Sampling Noise level
Hi everyone,
Is there a way to sample the noise in a given environment? I was
interested in having a mote (mica2) just monitor the noise level, and
not send or receive any packets. I checked the archives and I couldn't
find anything on this, so if anyone had any ideas or could point me in
the right direction, I'd appreciate it.
Thanks,
Sean
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