[Discuss-gnuradio] USRP1 questions

[osama mohamed]

hi all,
i am using USRP1 with  basic tx and rx boards and i have been suffering some problems recently so i hope you could answer the following questions(even if not all of them)

Q1: when i run the examples tx_timed_samples.cpp and tx_burst.cpp i don't get any output i tried various sampling rates and amplitudes but they still didn't produce any output if there is a certain configuration (i.e. sampling rate and amplitude) that works kindly inform me also i would like to know the output i am expected to see?

Q2: i would like to tx a signal by setting the NCO frequency on the codec chip through the class codec_ctrl instead of using the PLL, is this doable or not and ,if yes should i use the class multi_usrp or i have to jump to the lower level class usrp1_impl?

Q3: can i use the low level class usrp1_impl to do the same functions of the examples  tx_timed_samples.cpp and tx_burst.cpp through setting the frequency tuning word of the codec through the class codec_ctrl ?

Q4: as i understand from the constructor of the class usrp1_impl  the sampling rates of the tx path are automatically detected and assigned through this constructor is this true or i have to set them through a certian function?