Receiver Transport Layer
To check the data integrity of the payload data stream through the JESD204B receiver IP Core and transport layer, the ADC is fed with a monotone sine wave test data pattern. The ADC is also set to operate with the same configuration as set in the JESD204B IP Core.
The AD9371 downconverts from RF frequency to monotone frequency. This RF frequency is tunable by the user and specified to AD9371 as LO frequency. Depending on the required phase of I and Q streams, the input frequency at ADC analog channels should be LO frequency ± monotone frequency. In our configuration the input frequency of LO frequency – monotone frequency is used. This is easily available at AD9371 DAC analog output and the same waveform is looped back to ADC through SMA cable.
Check the transport layer mapping using Sine test pattern.
The following signals in altera_jesd204_transport_rx_top.sv are tapped:
The following signals in jesd204b_ed.sv are tapped:
The rxframe_clk is used as the sampling clock for the Signal Tap II.