RX-888 MKII SDR Radio Receiver SDR Ham Radio Receiver LTC2208 16Bit ADC Direct Sampling R828D RX888 Plus

Description RX 888 MKII is the new generation of RX888 with the following improvements and enhancements 1 Add a tunable Attention in the HF path which can tune from 0 to 31 5dB 2 Change the fixed LNA of RX888 to a VGA which gives the 10dB to 33dB range VGA applies to both HF and VHF 3 Use the newer generation of tuner chip R828D instead of R820T2 4 Use an enhanced version of 64M LPF to improve image rejection further 5 A jumper can select the internal reference clock or an external 27Mhz reference clock The primary motivation is giving users smaller granularity control on theRF front end and a big dynamic range to fit the demands of both strongand weak signals receiving The tunable range is 41 5dB to 33dB for HF and 0db to 55dB for VHF which covers most use cases During the MKII development we are working very closely with the original author of BBRF103 IK1XPV on his new universal driver The new driver supports RX888 and RX 888 MKII now And we expect the power of opensource will significantly improve the software support and the lifetime of RX888 Open Source Address of Firmware https github com ik1xpv ExtIO sddcSpecifications 1 LTC2208 16bit ADC at 130 MSPS2 Dual RF input HF frequency range 1kHz 64Mhz maximum real timebandwidth 64M VHF frequency range 64M 1700Mhz maximum real time bandwidth 10M 3 0 5ppm VCXO4 ATT adjustment range 32dB to 0dB5 VGA adjustment range 11dB to 34dB6 External 27Mhz reference clock support7 3 3v software switche