Lynx RPi5 Dual RX

The Lynx receiver is a DATV receiver being developed by Justin G8YTZ. As of July 2026 it was in early prototype form and not released.

The hardware includes a Raspberry Pi 5 with display, network connected to a PicoTuner with G4EWJ's ethernet interface.

Features include diversity reception across the tuner's 2 inputs.

Attached is the Alpha software for the “Pi 5 Lynx” DATV Receiver that I have been working on. You’ll need a Pi 5 with 4GB RAM and a 32GB SD card. In theory a 2GB Pi 5 will work, but will be come a problem as I add new features. PicoTuner with ethernet - latest code required.

Known issue to be aware of: On first boot/tune in Diversity mode one tuners may not lock, we’ve implemented a workaround, by sending the tune command twice on boot, but the core issue seems that the PicoTuner cannot reliably cope with a second tune command whilst acquiring/locking the first signal.

Readme Folder:

Installation Instructions for the Alpha testers Web UI documentation - what all the bits do Lynx Features (quite old now, but sets the scene) Lynx Diversity manual - details of the Lynx Diversity feature and the journey so far. Lynx Diversity Progress Report - a bit historical now, but explains why we changed to PCR from packet sequence combining. My original idea was we could generate wall-clock sequence numbers by generating check sums from the packet sequence, but PCR was much simpler to implement.

best regards

Justin Cockett - G8YTZ