try rereading my original message. I said on the telosb that the default is the PCB antenna.
You need to look to see if there is a cap by the sma antenna that can be used to switch between the PCB an SMA antennas. I suspect there is. On Wed, Oct 23, 2013 at 3:04 PM, Jenis Modi <[email protected]>wrote: > Hi Eric, > > Thanks for the reply. The mote which I use (attached image:Mote.jpg)has > written MTM-CM5000-MSP on it, but I also have got SMA connector on it. I > believe we had ordered like that only. > > 1. You said that by default PCB antenna is enabled, so does that mean if I > am using external antenna on the mote, the packets would be sent from > internal as well as external antenna ? > > 2. Also to note that, I have used these motes for sending packets and if I > cover/block external antenna with my hand, the receiver does not receive > any packets. If the first statement is correct, then I am confused now. > > Please help. > > Thanks. > Jenis > On 10/23/2013 02:16 PM, Eric Decker wrote: > > > its hard to tell... > > First, it depends on it the Advantic folks made any changes to the > telosb when they rolled it into the CM5000. Probably not. > > If the advantic board is the same as the telosb, then here is how it > works. At least this is how the telosb works. The telosb has provisions > for a SMA connector but by default the SMA isn't loaded and the onboard PCB > antenna is used. The choice is determined by the capactor C73 which can > be loaded in one of two positions, 12 enables the PCB antenna while 13 > enables the SMA. By default C73 is placed so the PCB is enabled. > > There is probably something similar on the CM5000. > > It is very unlikely that if you bought an CM5000-SMA that comes loaded > with the SMA antenna that the PCB antenna is also enabled. It wouldn't > work very well, at least for max range. The two antennas would interfer > with each other. Not good. > > > eric > > > On Wed, Oct 23, 2013 at 1:32 PM, Jenis Modi <[email protected]>wrote: > >> Hi, >> >> I am using MTM- CM5000-SMA ( >> http://www.advanticsys.com/wiki/index.php?title=CM5000-SMA) motes for my >> experiment. I use 2.4 ghz external antenna to connect to it. I want to know >> if internal antenna of these motes are disabled by default. If not, how do >> I disable them? Please provide your expertise. >> >> -- >> Thanks. >> Jenis >> >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > > > > -- > Eric B. Decker > Senior (over 50 :-) Researcher > > > -- > Thanks. > Jenis > > -- Eric B. Decker Senior (over 50 :-) Researcher
_______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
