Other Parts Discussed in Thread: TIMAC
We have been using the 7x7mm RGZ package successfully in our designs for almost 2 years. We designed a new PCB with the 5x5mm RHB package and now have an interesting radio issue.
CC2650RGZ (devkit) when communicating with CC2630RHB (our new PCB) OR CC2630RGZ (our original PCB), with everything sitting on a desk.
Test 1:
CC2650RGZ measures about -50dBm RSSI
CC2630RHB measures about -100dBm RSSI
Test 2:
CC2650RGZ measures about -50dBm RSSI
CC2630RGZ measures about -50dBm RSSI
When using a sniffer, we see similar RSSI from both transmitted signals, so it seems that the issue exists in the receive pathway on the CC2630RHB PCB only. The only components (on both CC2630 boards) between the RF_MCU_SE signal in the schematic below and the CC2650RGZ devkit are an RF switch, two antennas, and air ... all of which should work with reciprocity, which makes me suspect we have something wrong in the MCU RF settings. Are there differences in the RF settings between the CC2630 RGZ and RHB packages?
See schematic snip below: