I want to be able to offer two frequency ranges, one being ~600MHz and the other being ~900 MHz. I'm wondering if I can expand the range of the 7020-1 to get up to the 900MHz. It looks like the -1 part was designed to hit the lower frequency ranges and that the upper end of the VCO was affected by this. Am I on the right track? Is there another transceiver part that will cover the two ranges mentioned? My data rate is about 50kbps.