DVB-T/T2 terrestrial receiver
MERlin
Glossary
2013 dB Broadcast Ltd
48
Version 1.2
GHz
Gigahertz. One billion cycles per second (10
9
cps).
Headend
Electronic control centre of a cable system. The site for collecting
signals from many sources, processing them and preparing them
for distribution.
kHz
Kilohertz. One thousand cycles per second (10
3
cps).
LDPC
Low Density Parity Check.
LSB
Least Significant Bit.
MER
Modulation Error Ratio. MER may be provided by the
demodulator chip or calculated from L1-Post to provide better
measurements in the presence of echoes, in difficult reception
areas or within an SFN.
MHz
Megahertz. One million cycles per second (10
6
cps).
MPLP
The DVB-T2 Multiple Physical Layer Pipe (MPLP) allows multiple
PLP’s to be present in the DVB-T2 modulation. The DVB-T2
allows for up to 256 PLP’s to be defined.
Modulation
A process that moves information around in the frequency domain
in order to facilitate transmission or frequency-domain
multiplexing.
MPEG
Moving Picture Experts Group. Industry standard for compressing
and decompressing digital audio video signals
MSB
Most Significant Bit.
MSps
Mega-symbols per second.
Multiplexer
An electronic device that allows multiple channels to be combined
into a single signal.
OFDM
See COFDM.
Packet
A variable-sized unit of information that can be sent across a
packet-switched network.
PAL
Phase Alternating Line. 50 Hz video format used in much of the
world outside of the USA.
PCR
Program clock reference.
PID
Packet identifier.
