Hi Hoang, the 380MHz is the lower frequency you can get with a RFX400. That's correct.
You can chose your daughterboard by using the number of channels argument (if you want both), or the subdev spec [1], like: B:0 to select the WBX in your second slot. Best regards, Marcus [1]http://files.ettus.com/manual/page_configuration.html#config_subdev On 08/14/2015 12:21 PM, Hoang Nguyen Tran wrote: > Dear, > > Sorry if I have too much question, I am getting started with GNU > radio, and I did not find the answer for this on the Internet. > > I have USRP1 and inside it has 2 daughter boards: WBX and RFX400. > I run the FM receiving grc file and got this > > UHD Warning: > Tune Request: 102.500000 MHz > The ification: > Target Frequency: 102.500000 MHz > Clipped Target Frequency: 380.000000 MHz > The RF LO does not support the requested frequency: > Requested LO Frequency: 380.000000 MHz > RF LO Result: 400.000000 MHz > Attempted to use the DSP to reach the requested frequency: > Desired DSP Frequency: 20.000000 MHz > DSP Result: 20.000000 MHz > Successfully tuned to 380.000000 MHz > > > I changed various frequency and figure out the range that has > Successfully tuned is from 380Mhz to 520Mhz. > I don't know why this happen, the WBX suppose to have range from 50Mhz > to 2200Mhz. Does it come from the wrong firmware ? > And moreover, my USRP has 2 daughter board, so how can I choose exact > daughter board to use ? In UHD USRP source of GNU radio. only have > options for antenna port for example RX2 or TX/RX, right ? > > Best regards, > Hoang > > -- > -HoangNT- > PhoneNo : +841654248782 <tel:%2B841654248782> > Skype : hoangastro > FB : https://www.facebook.com/kenshin.rorouni > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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