One of my customer is investigating a 351MHz and 467MHz digital wireless radio with 4-FSK modulation.
For this purpose, he is interesting ADF7021-N and ADF7021-V transceiver.
The frequency range and modulation mode of these transceiver are okay for his new design.
However, one issue is IF bandwidth.
The standard says that the channel spacing is 6.25 kHz.
Is there any way to reduce IF bandwidth of these devices in order to adopt this channel spacing standard? Or do you have any other recommendation for his new design?