Lnb Power And Control; Dvb-S2X Satellite Receivers; General - Ericsson RX8000 Reference Manual

B.2.1.2

LNB Power and Control

The RX8000 Integrated Receiver/Decoder provides LNB power and control signals
through the active RF input connector. LNB power and controls are enabled through
the Satellite Input Menu.
The RX8000 Integrated Receiver/Decoder supports voltage controlled LNBs only.
The LNB power circuit provides automatic protection against short circuits in the
LNB or its cable. When the short circuit has been removed recovery is automatic.
Switchable boost of the LNB voltage to allow for losses in long cables and control of
22 kHz tone insertion are provided. The LNB power characteristics comply with IEC
1319-1 and are as per Table B.22.
Table B.22 LNB Power and Control
Parameter
Voltage
Current
LNB control
Tone amplitude
B.2.2

DVB-S2X Satellite Receivers

B.2.2.1

General

Table B.23 DVB-S2X Satellite Receiver Input Specification
Parameter
L-band input
Safety status
Number of inputs
Input connector type
Input impedance
Return loss
Isolation between inputs
LO leakage
7
Receive Polarisation: As specified in ETS 300 784 Satellite Earth Station and Systems (SES); Television Receive-only (TVRO) earth
stations operating in the 11/12 GHz frequency bands.
EN/LZT 790 0005 R7A
Voltage V (nominal)
13
18
350 mA maximum
22 ± 2 kHz tone
0.65 ±0.2 Vp-p
Specification
TNV - 1
4 (RX8200/HWO/DVBS2X/A)
F-type, female 75 Ω
75 Ω
> 10 dB
> 60 dB, typically 70 dB
< -80 dBm
Technical Specification
Specification
Receiver Polarisation
Vertical/circular right
Horizontal/circular left
7
B-21