Installation - Alcad 912-uc Serie Manual De Instrucciones

The maximum number of transponders can be increased by reserving 30
MHz for transponders with 27 MHz bandwidth.
MHz 950
36
40 MHz
4.

INSTALLATION

The drawings in the ANNEX show how to perform the assembly and the
standard connections.
4.1 Unit supply
To supply the unit, it is necessary to connect every module to the MS-011
support framework, which performs the mass connection.
Placing of 75 Ω Ω load
4.2
Except the TEST output of the PA amplifier, verify that the remaining
unused inputs and outputs are loaded with an RS-275 (code 9120011)
load of 75 Ω.
4.3 Installation of external LNB units
It is very important to make a note of the dish, the quality of the digital
signals, which fade out very much when it is not properly recorded down
(in spite of being good for analogic signals).
Correctly adjust the skew of the external unit LNB to get the best possible
cross polarisation.
reception of the digital signal. The cross polarisation must be 20 dB
lower than the level of the digital signals.
Verify that the external LNB units are supplied. To do so, turn the +V LNB
(27) switch on in one of the UC modules that are directly connected to
each LNB unit.
Serie 912 - UC
990 1026
36 27
36 MHz 30 MHz
Fig. 6 - Adjusted frequency plan
This adjustment is fundamental for high quality
1056 1092
27 36
36 MHz
ENG - 23
1132
36
40 MHz