i am doing the rx signal quality test with AD9361 on the zedboard.
The initialization configuration is as below,
Digital Filter: LTE 5M;
RX Gain Control: Slow AGC;
Tx Frequency: 2.5GHz;
I use a signal source(Agilent E4438C) to generate a 16QAM signal,and a 10MHz clock is offerd by E4438C ,which is used as the reference clock for ad9361.The 16QAM signal is described below,
symbol map: 16QAM(natural mapping);
symbol rate: 500ksps;
pulse shaping: rectangle;
tx modulation: one carrier.
I captured the IQ data from ad9361 with chipscope, and the digital interface has been verified(using loopback function).
The result shows as below,
Figure1. my test result on zedboard- with rx signla power is -30dBm
I think the symbol seems to be too scatter, could somebody give me any suggestion?