Part Number:CC1101-CC1190EM869RD
Hello All,
Application Details:
Settings: HGM: Set to logic "HIGH"
PA_EN: Set to logic "HIGH"
LNA_EN : Set to logic "LOW"
RF RECEIVER: CC1110 custom board (as mentioned above) with relevant code to receive RF frames.
I have followed the CC1101-CC1190 reference design closely and replaced CC1101 by CC1110.
My application requires extended communication range, hence used CC1190 along with CC1110 at 865.2Mhz- 866Mhz.
Query/ Observations:
I have tried using both the crystals; 26MHz (9B-26.000MEEJ-B) and 27Mhz( ECS-270-20-46X).
A) It seems to work with the 26Mhz crystal however the RSSI observed is in the range of -77dbm to -81dbm at a distance of 1.5 meter approximately with max RF output power. This RSSI value is worse compared to another PCB consisting of CC1110 without range extender - CC1190.
B) There is no Signal on RF/ Antenna with 27MHz crystal.
The saw filter used in the design has its center frequency at 869 Mhz. Since my application is around 865-867 Mhz. I have replaced it with SF2314E having center frequency at 866.5 Mhz. However the board doesnt seem to show any improvement in RSSI values. It is still in the range of -70dbm to 80dbm Could you suggest me whether any other changes are required? How do i improve the RSSI/ output power of the of the board?
Regards,
Nidhi Lodha