I've recently purchased a third dual T2 terrestrial tuner from WoS for the Vu+ Ultimo4K.
The first attachment shows the tuner config before adding the additional BCM3466 tuner. Everything works ok.
The second attachment shows a working config. Tuner F has to be disabled.
The third attachment shows what happens when tuner F is enabled. Tuner B becomes DVB-C, (as does tuner F) but the modes remain DVB-T2. Tuner B no longer works.
The fourth attachment shows what happens when tuner F is configured as DVB-C, mode: DVB-C. Tuner B starts working again.
There's also a debug log (ABM "start scan" is an easy way to get tuner B to fail) and a dmesg.
I'm sure there must be some telnet commands to provide the nitty gritty details.
Maybe I should also add that the BCM3466 tuner started life as DVB-T2 only, and was only turned into dual at a later date.
https://www.world-of-satellite.com/s...l=1#post498582