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6.2.4 Connector Details – Constellation Output
(RX1290/HWO/DVBS2/IF/CONST)
Connect the I and Q constellation output connectors to a suitable
display device such as an oscilloscope set to X-Y mode.
Constellation output is enabled using the Input Status Menu
(Menu 2).
Notes: Enabling the constellation mode will disable the demodulator’s output
transport stream rendering the receiver unable to decode a service.
Constellation output mode is only available when decoding DVB-S2 signals.
The specification for this connector is given in Annex B, Technical Specification.
Table 6.3 DVB-S2 Satellite Receiver (Constellation Output) Connector
I/Q Output
Input Specification
Connector Type BNC, Female
Connector designation I, Q
Pin: Centre
Shield
I/Q Output
Ground/Chassis
Impedance
75 Ω
6.3 TTV G.703 DS3 and E3 Input Card (TT1290/HWO/G703)
The TTV G.703 input card receives a transport stream directly from a PDH network.
The card is user selectable to receive from either a DS3 network or E3 network.
For technical specifications for the TTV G.703 card, see Annex B, Technical
Specification.
6.4 IP Input Card (TT1290/HWO/IP)
The IP Input card provides a 10/100BaseT Ethernet port, on which a transport
stream can be received in UDP packets at up to 50 Mbps.
The mapping of MPEG-2 TS packets into IP data frames is done according to the
protocol stack shown in Figure 6.1. The figure shows the Protocol Stack in use when
mapping MPEG-2 into IP frames and Ethernet.
EN/LZT 790 0003/2 R1A
6-5