Hello-
Regarding the plot of frequency response of the CC1125 IF filter, The two plots at the bottom of page 16 of the CC1125 data sheet show selectivity versus frequency, but without much resolution. Could I please get the 1dB, 3dB, and 6dB bandwidth? Iam trying to calculate crystal offset versus sensitivity. Thank you,
-Tim Starr on behalf of SL@PL
Do you want to know sensitivity as a function of frequency offset to calculate how wide the RX filter has to be and/ or how large tolerance you may have on the crystal?
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Yes please.
Which datarate etc are you using? We have data on this for some test cases.
cc1125 @ 4.8kbps; 25KHz CH spacing optimized to meet EN300-200 class 1 868 MHz
Thanks
The attached plot is for 1.2kbps, 4kHz deviation, 10kHz channel bandwidth. By using feedback to the synth for the frequency compensation (see FREQOFF_CFG) the ppm range may be increased by 50%.
Hi TER-
Thanks for your reply but I didn't see an attachment. Please repost or send directly to me at timothy.starr@avnet.com. Regards
-Tim