HI List, I get a USRP + DSBRX. Now I need to buy an active antenna for GPS, but I don't know how to bias it. Can anyone helps me? Greetings, -- Davide "Rocker" Anastasia Web: www.davideanastasia.com * Linux User #341094 * Luke Skywalker: Alright, I'll give it a try. Yoda: No! Try not. Do... or do not. There is no try. -- Davide Anastasia web: http://www.davideanastasia.com/ email: email@example.com
on 2007-02-02 11:09
on 2007-02-02 13:49
You can do this externally by putting in a bias-tee in the RF line prior to input to the USRP. I've personally used the following from MiniCircuits: http://minicircuits.com/pdfs/ZFBT-4R2G-FT.pdf Or if you want to take a more risky route, on the DBSRX daughterboard there is header to input a DC voltage. I'm trying to do the same thing (GPS with the DBSRX & USRP), and am not going to risk frying something at this point. Hope this helps.
on 2007-02-02 19:57
Gregory W Heckler wrote: > There are 2 ways to use the built-in bias tee on the DBSRX -- 1 - If you want to supply your own voltage, apply it to J100. Put + and GND on the marked pins 2 - If you want to use the onboard 5V regulated supply, DON'T connect to J100. Instead, place a short across the pins of J101. The board is unfortunately labeled "6V", but it is actually a regulated 5V. Matt