Hi, While I was testing the DQPSK-(de)modulation blocks in GRC. I found a frequency region where the reception failed. I started with the ISM-band (433 MHz) as the center frequency, and the reception didn't work. After checking my code several times I decided to change the center frequency to 2 GHz and everything started to work. So I tried several other center frequencies with successful outcome, for example 2 GHz, 1.5GHz, 800MHz, 500MHz, 420MHz. If I tuned the frequency to the 430-440 MHz region the reception fails.
I've used 2 USRP2s with the WBX and connected them with a cable and 20 dB attenuator. I have 4 different WBX cards and the result is the same for each of them. Have someone encountered the same problem with frequencies around 433 MHz? Br, Patrik _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
