Specifications

xiv 888-2857-001 5/9/13
WARNING: Disconnect primary power prior to servicing.
permit sending of multimedia information (radio, TV, and data casting) to mobile
devices such as mobile phones. Originally developed in South Korea.
DUC (Digital Upconverter):
A circuit in the LPU modulator section that converts the digital modulated baseband
signal to the 140 MHz digital intermediate frequency.
Dynamic Delay:
A processing function provided in the exciter to compensate for different delays of
the program data stream in the data distribution network between the network
origination point and various transmitter sites. A time-stamp contained in the
transport stream serves as a reference. The present time is delivered by a GPS
receiver at the transmitter (1pps signal, rising slope). Comparing these two sources,
the dynamic delay function is able to synchronize the program input to all
transmitters over a one-second correction range.
Ensemble:
The complete information payload being received and processed by the transmitter,
typically when transmitting according to the DAB standard. In general, the
ensemble includes audio programs, data services, and possibly video content.
ETI (Ensemble Transport Interface):
The transport stream format for DAB/DMB broadcasting (2.048 Mbit/s, G.703)
used to send program material from the ensemble provider to all DAB transmitters
in a network. The ETI format has two varieties: ETI-NA and ETI-NI.
ETI(NA) (Network Adapted Layer):
A protocol is suited for transmitting the ETI signal via telecom networks. It has a
frame structure that complies with G.704 specifications and contains error
protection information (Reed Solomon Code). The bit clock frequency is 2.048
MBit/s.
ETI(NI) (Network Independent Layer):
A protocol is suited for transmission with connections that have a low error rate and
a constant signal delay. It does not contain any error protection information. The bit
clock frequency is 2.048 MBit/s.
ETI Input Board (EIB):