Developed as a 3rd capture option for the decode projects outside of the CX Cards and DomesDay Duplicator methods this brings far more flexibility for not only for FM RF capture, but marks a milestone end in the battle for USB 3.0 based capture devices that will just work on virtually any CVBS or S-Video source allowing for stable true reference captures of hardware output from devices.

This is currently a development board, without dedicated settings dips per signal type so the DC offset pot has to be adjusted if you wish to capture CVBS.

NOTE: Requires adapter PCB for Tang Nano 20k (current misrc_capture)

MISRC GUI - Download here

FAB NOTE:

• The vias in the pads are there on purpose, there is a bottom pad on the voltage regulator, for hand soldering the vias are necessary to solder that pad and it's for thermal reasons.
• From 05.02.2025 V1.5a is now the production version of this board, crystal package and SMA connector has been changed.

Features:

• Two 12-bit ADCs (upto 65msps / 40msps stock)
• Selectable input gain (8 steps)
• Selectable ADC range (1V or 2V)
• Selectable input impedance (75, 50, 37.5 and 30 ohms)
• DC or AC (pre- or post-termination) coupling
• Zero-adjust to compensate DC offset
• Latching clipping indicator
• Clock source selectable: USB PLL, crystal or external
• Output clock to external device
• Melted PCB Traces

Coming Later

• Audio Sub-Board Setup Docs
• 3D Printed Cases
• MISRC V2.5 with audio integrated

Documentation & User Guide Info:

• Main GitHub Docs
• RF Capture Guide

Possible capture examples:

• Capture 2x CVBS
• Capture 1x S-Video (Y & C)
• Capture Video RF and HiFi RF simultaneously
• Capture Video RF and CVBS simultaneously

Credits:

Harry Munday - Development input, User & Fabrication Documentation, Hardware Design, MISRC GUI.

Stefan O - Hardware Design & MISRC Extract

Vrunk11 - MISRC Extract (Software)

Jitterbug - Software Build Automation