Are you read my contribution in this forums "Reciprocal Mixing and useless any RMDR".
This my contribution includes "Contraction of ARRL's RMDR".

73
JA2GXU

Phase noise problem for use general kind of GPSDO.

Degrading phase noise occurs desired weak signal buried in increased noise floor
I recommend don't use general kind of GPSDO due to degrading phase noise.
Improved GPSDO includes VC_OCXO and PLL have more than 100 seconds loop time constant, thus ...

Basic theory and concept for reciprocal mixing and MRS
for HF receivers and transceivers

Introduction
My friend of Ham radio operator said receiving desired weak signal readability ranking are
DS_SDR > TS-590 > FTdx5000 at 20m band,
however FTdx5000 can't detect and read to the same desired ...

My friend of Ham radio operator said receiving desired weak signal readability ranking are
DS_SDR > TS-590 > FTdx5000 at 20m band,
however FTdx5000 can't detect and read to the same desired readable weak signal (DS_SDR is direct sampling SDR). Those are DS_SDR heard 100% desired readable weak ...

Unfortunately this presentation don't have any minimum readable weak signal strength such as assumed MRS. And only have MDS that don't mean any MRS.
And also RMDR and DRNS can't meet actual reciprocal mixing test.
I posted to ARRL due to RMDR and actual reciprocal mixing test with test procedure and ...

Comparison Table for MRS, RMDR IMDDR etc.pdf MDS, RMDR and DRNS can't have any readable weak signal strength and published test date can't related to reception of minimum readable weak signals.
Assumed MRS or MRWS extreme useful for DX etc and MDS, RMDR and DRNS useless for DX etc.
Ham radio ...