1. Measurements An comparison between the RTL-SDR and SDRplay

2. SDRplay measurements @ 169 MHZ -78Db gain unless stated otherwise

3. Lna status measuring signal to noise in db LNA lives up to its name and significantly improves SNR

4. bandwidth measuring signal to noise in db SDRplay seems to be slightly more sensitive on the 200khz bandwith mode -38 Db gain

5. If mode measuring signal to noise in db Notice how zero if seems to perform slightly better then the low if mode

6. Why you still should use low if

7. SNR measurement @ 169 mhz

8. Obligatory “RTL-SDR” block diagram Actually r820t block diagram Although impossible with the normal driver the LNA of the R820T can actually be adjusted using a third party driver.

9. SNR result overview 200khz bandwidth

10. SNR result overview 1500khz bandwidth

11. Antenna connection

12. SNR normalization data Post global test connection test: no gain, no lna, 200/150 khz bandwidth, zero if 27MHZ169MHZ446MHZ SDRplay direct453446 RTL-sdr direct552245 T split SDRplay37 (-8) 32 (-2) 53 (+7) T split RTL43 (-12)26 (+4)47 (+2)

13. SNR result normalized 200khz bandwidth

14. Conclusion