What are the range of allowable bandwidths that can be up/down-converted, and if there is a relationship between bandwidth and possible RF/IF frequencies, what is that relationship?
What are the range of allowable bandwidths that can be up/down-converted, and if there is a relationship between bandwidth and possible RF/IF frequencies, what is that relationship?
We have successfully run 800MHz 5GR MC signal in TX using an IF of 4.2GHz. It's mostly a function of the pass-band response at IF. iBW<1GHz are feasible provided you pick your IF center frequency well. We can't do 1.6GHz unfortunately with this design. Nor can you deviate from around 6Gsps DAC sampling rate and 5Gsps ADC sampling rate. There is a fixed filter at IF to both filter converter images and perform anti-aliasing ahead of the ADC. The ideal ranges are:
RF frequency range = 19 – 31 GHz
TX IF center frequency = 3.8 – 4.6GHz
RX IF center frequency = 3.4 – 4.3GHz
For large iBW, I'd recommend starting with 4.2GHz IF in TX and 3.7GHz in RX. Start there and optimize it for your targeted RF frequency, based on DAC sampling images, mixer spurs and acceptable pass-band roll-off.
For more info on the AMD Xilinx RFSoC Gen 3 Kit for mmWave visit the product page.avnet.me/rfsoc-mmwave.
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