I've uploaded documentation of revision 2 of the module. There are many improvements: 1st mixer was redesigned (now slotline balun is used), also amplifier was improved (it should have better wideband matching) and filters were improved (input filter is now elliptic filter, IF bandpass filter is mostly the same but low pass filter was optimized).

More details in the design description (file SIGN_CONV_rev2_design_pack.zip).