Tvheadend

Hello,
my setup is as follows:

the sat-ip server is a Multibox-03014D:SAT>IP from Inverto Digital Labs.
the tvheadend runs on a synology diskstation.

When i run the assistant, i always get 6 possible tuners.
2 tuners for IP TV:

• IPTV #1
• IPTV #2

and 4 tuners that are directly related to the multibox:

• SAT>IP DVB-S Tuner #1 (192.168.188.4@UDP)
• SAT>IP DVB-S Tuner #2 (192.168.188.4@UDP)
• SAT>IP DVB-S Tuner #3 (192.168.188.4@UDP)
• SAT>IP DVB-S Tuner #4 (192.168.188.4@UDP)

the first two can be assigned a network type of "IPTV automatic network". the next four can be assigned "DVB-S network".

Scanning for muxes does not work, if i assign all 6 tuners. I have to leave the IPTV tuners blank.

What am i doing wrong?

And how can i make sure, that all available tv and radio channels are being detected? I dont know for sure right now, but i think, that i am missing the one or other channel in my list...

Greetings
Wolfgang