we have different bandwidth requirements of 2.4MHz, 9.6 MHz,22.5 MHz and 32.5MHz.
we did different TX RF bandwidth settings i.e
desired RFBW TX RFBW setting
2.4 MHz 8MHz
22.5 MHz 40MHz
we observed EVM of AD9364 transmitter with this BW settings in VSA . Below this RFBW setting the EVM is going to worse and EVM of 22.5MHz is much worse even for the TX RFBW setting is 40MHz.
As per reference manual, the calculations of filter cutoff frequency are,
RF BW =2* BBBW
f cutoff = BBBW * 1.6(channel_factor)
why we need to set RFBW more than desired BW requirement?.
Are we doing any mistakes in BW setting? does tx work for the bandwidth of 32.5 MHz? please help us on this.
why RX_RF bandwidth is 56 MHz and TX_RF bandwidth only 40MHz?