Capable of receiving digital feeds from satellite links, terrestrial compression
centres or a main cable head end the TT1220 is a professional product with a wide
range of interfaces and functionality.
The TT1220 is capable of descrambling one selected service and delivering it as an
ASI output. A complete ASI service can be achieved by cascading several receivers
A major function of a professional IRD at an analogue cable head end is to provide
excellent analogue audio and video signals. The TT1220 achieves this with its
ability to handle all major composite formats including PAL, NTSC and SECAM.
The TT1220 has already been adopted by most of the major DTT implementations
in Europe as they emerge as the next platform in the terrestrial arena, proving the
ideal solutions for adaptation systems and regional head ends.
Functionality that includes real time monitoring, remote status and content
checking are essential for Digital terrestrial systems; all are included in the TT1220.
Equipped with an OFDM demodulator front end that includes MER measurement,
the TT1220 is an ideal solution for professional DTT error detection and monitoring
the network for content failure, modulation failure and bit errors.
Distribution & Contribution Application
The TT1220 can be used as a satellite receiver at receive sites and also for the
monitoring of content delivery. As the receiver supports a wide range of DVB open
standard and proprietary scrambling systems it is well suited to operate in a large
number of different satellite distribution systems.
The TT1220 can also be utilised in a highly secure Ericsson Director network
management and receiver control system. This system enables the operator to
accurately control who receives their output and using the over air control facilities
ensure that receivers are correctly tuned and their content scheduled. Again this
removes the necessity for remote sites to be manned at all times.
DVB QPSK input
F-type (female), 75 ohm
13V, 18V or off
DVB ASI input
Sustained TS data rate:
Maximum burst times:
BNC (female), 50 ohm
370 micro seconds at 216Mbps
F-type (female), 50 ohm
6MHz, 7MHz or 8MHz
2K and 8K selectable
QPSK, 16QAM, 64QAM Auto-detected
1) The nature of COFDM modulation introduces an end-to-end
PCR jitter that is larger than DVB ETR290 specification (<500ns). The typical magnitude is around 1000ns; this will
trigger alerts in an ETR290 monitor, but will in the vast majority of cases have no practical decoding implications.
Analogue Video Output:
Connectors: 2 x BNC (female)
Digital Video Output
Connector: 1xBNC (female) 75ohm