On 9/27/06, Brian Padalino <[EMAIL PROTECTED]> wrote:
It might not be a bad idea for Ettus Research to also stock some other items such as SMA cables/adapters/attenuators.
Attenuators might a good idea. I think a model to match the 100mW transmitters would be Mini-Circuits' VAT-15 (50 ohm, SMA, 1W, 15dB, usable up to 4GHz) if I've done my loss calculations correctly <www.mini-circuits.com>. A 9 or 6 dB for the BasicTX should be usable if I haven't messed up my calculations.
It might also be handy to have some nice block diagrams with max power recommendations and recommended attentuations for cabled setups as well as a table in the Wiki with such recommendations.
Here is what I think the calculation is: transmit power converted to dBm (1 dBm == 1 mW) minus the attenuator loss = output power in dBm. E.g. 100 mW -> 20dBm 20dBm - 15 db att = 5 dBm 5 dBm -> 3.2 mW So if the receiver can handle 3.2 mW input, this would be adequate attenuation. Off hand I don't know what is acceptable input power range. dBm ref: <http://en.wikipedia.org/wiki/DBm>
That might save some of the more software oriented people from burning out their hardware without intentionally doing so.
Agreed. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
