6
5. Input circuit
In the PXU 848 C/T, signals are directly fed to the input tuners. Due to the triple tuners, there are eight inputs each
for SAT and eight for terrestrial signals (DVB-T/T2 or DVB-C). In the
‘factory settings’ condition, there is a 12 VDC
voltage for LNB supply on SAT input tuners 1, 2, 5 and 6. This can be switched by corresponding jumpers J1, J2, J4
and J5. On tuners 4 and 8, a 12 V supply voltage for the terrestrial range can be activated by inserting the
corresponding jumpers J3 and J6. The operating states are indicated by external LEDs.
6. Mounting
The compact headend must be mounted in a well-ventilated room. The environmental temperature may not exceed
45 °C. It must be ensured that the air can circulate freely through the ventilation holes, especially in horiz
ontal 19”
mounting. There must be at least 15 cm space around the device ventilation holes, so that the air can circulate
properly. For mounting or when working on the wiring, the power plug must be disconnected.
15 cm
15 cm
= Heat accumulation!!!
J3 > 12V on/off tuner 4 terr.
J5 > 12V on/off SAT tuner 6
J2 > 12V on/off SAT tuner 2
J1 > 12V on/off SAT tuner 1
J4 > 12V on/off SAT tuner 5
J6 > 12V on/off tuner 8 terr.
