One of the installation issues subscribers experience quite often is which UBs to use when configuring their decoders. Sometimes after a software upgrade, decoders default back to factory settings which can be a serious matter when more than one decoder is working off a common SLNB or DStv switch.
This thread provides some detail regarding what UBs are available for selection on the various decoder models which are SATCR/Unicable enabled.
4 tuner HD PVRs:
The decoders are preprogrammed to use UBs 0, 1, 2, 3. No facilities exist to be able to change the settings. If this decoder model is fed from a common SLNB or 24-1Z switch, then any other decoder will have to adjusted NOT to use the above UBs. Hence, only one of these decoders can be connected to the Unicable ports on a SLNB or 24-1Z switch. Note also, these decoders cannot be connected to the Unicable ports on the older 5-2 ES.
2 tuner HD PVRs:
These decoders default to UBs 0, 1. There are facitilies to change the choice of UBs on these decoders. The choice should be restricted though to UBs 0 to 7.
HD decoders 4- & 5-series:
These decoders only provide for UBs 0 to 7 to be selected.
The 4-series decoders only use 1 UB and the default is UB 0.
The 5-series require 2 UBs and the defaults are 0, 1.
This decoder defaults to 0, 1, 2.
32 UBs are available for tuners 2 & 3.
Tuner 1 can only select UBs 0 to 7.
Explora 2A & 3A:
These models provide for UBs 0 to 23 only.
The defaults are UBs 0, 1, 2.
Octo LNB; 2 by 2x4 MS; 2 by ES 5-2; Dedicated PSU for LNB, ES's, MS's; HD PVR 4P x 2; Explora 1; DSD 660; FSM