Zgemma H7S - Strange signal crosstalk / interference between Tuner A and B
Hi everyone, I'm experiencing a very strange issue with a new batch of Zgemma H7S units.
The symptoms:
- Tuner B seems to "pick up" signal from Tuner A internally, even when no cable is connected to LNB2 input.
- I can watch two different channels from the same band/polarization (e.g., 10719V and 11075V) using only ONE cable in LNB1, while Tuner B is set to "loopthrough" or even when it's supposedly independent.
- When this happens, the picture on both tuners suffers from heavy pixelation/artifacts (BER spikes).
- Most strangely: If I plug a "dummy" cable into LNB2 (not connected to anything), the "ghost" signal on Tuner B works (with errors). If I unplug it, Tuner B loses signal completely. It's like the LNB2 socket acts as an antenna for internal crosstalk.
What I've already tested:
- Multiple images (OpenATV, OpenPLi, Hyperion).
- Different power supplies (3A and 5A).
- Multiple units from different batches - same issue.
- Standard LNB and Unicable (SCR) - problem persists.
Has anyone noticed a hardware design flaw in recent H7S revisions? Is there any driver fix or a hardware mod (like better shielding) to stop this interference?
