DTC AEON-LT HEVC 4K, Руководство пользователя

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AEON-LT HEVC 4K Transmitter Commercial in Confidence Revision: 1.0
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TX
Sub-Menu Options Description
Frequency Frequency
dependent Enter a transmit frequency for the system.
RF Output Off
On Sets the RF output on or off.
RF Power 10mW
50mW
100mW Sets the RF output power level.
Mod Scheme DVB-T
UMVL/Narrowband DVB-T modes give excellent data throughput.
Ultra Mobile Video Link uses the same bandwidths as
DVB-T, but will give an advantage at C/X-band in short
range mobile environments.
DVB-T or NB/UMVL
Bandwidth
6MHz
7MHz
8MHz Sets the RF bandwidth for the transmission of data.
DVB-T or NB/UMVL
Constellation
QPSK
16QAM
64QAM QPSK – less user data, more robust, more range.
16QAM – more user data, less robust, less range (link
performance reduced by 5db).
64QAM – max user data, least robust, least range.
DVB-T or NB/UMVL
FEC
1/2
2/3
3/4
5/6
7/8 The forward error correction (FEC) rate.
1/2 means 1 bit out of 2 bits is data and thus 1 bit is
used for error correction.
7/8 means 7 bits out of 8 bits are data and thus 1 bit is
used for error correction.
DVB-T or NB/UMVL
Guard Interval
1/4
1/8
1/16
1/32 The guard interval is an extension of the RF symbol period
to give immunity to reflections.
1/32 deals with fast reflections, more data, less range.
1/4 deals with slower reflections, less data, more range.
More user data means better picture quality, but less
error correction means less robust signal and thus less
range.
DVB-T or NB/UMVL
Dual Pedestal
On
Off DVB-T only. Dual Pedestal mode will double the bitrate by
using two adjacent COFDM channels with 1MHz
separation. i.e. DVB-T 8MHz in dual pedestal mode will
give a total bandwidth of 17MHz.
DVB-T or NB/UMVL
Polarity
Normal
Inverted DTC equipment operate in Normal .
DVB-T or NB/UMVL
4K Offset
None
+4kHz
-4kHz DVB-T only. Shifts the spectrum by one carrier (approx.
4kHz) to overcome interference. Only use if needed.