Televes DVB-S2 COFDM, Руководство пользователя

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DVBS2 - COFDM
14
5.1. Normal menu
a. Input menu
The fi rst main menu lets you select the input
frequency , the symbol rate of the input signal
and the power supply of the LNB converter
(0, 13v22KHz, 13v, 17v22KHz or 17v).
INPUT
Freq.: 1234MHz
27.500 Kbaud
LNB:13V22KHz
To make a change press the key until the desired
parameter fl ashes. This fi eld can be then be
changed by means of the keys and .
The range of values allowed for the input frequency
is
950-2150 MHz , whereas for the symbol rate the
range is 10 to 30 Mbaud .
In case of a ‘short-circuit’ in the input connector
(power supply enabled for the LNB) the LED on
the front of the module fl ashes until this condition
disappears.
5. - Instructions for use
Insert the programmer in the front connector of
the module programming (“PRGM”). First, the
programmer’s fi rmware version will appear:
PCT firmware
version
------------
V:5.3
The fi rmware version of the DVBS2 – COFDM
module is shown below:
Unit
Firmware
version:
1.05
b. COFDM1 modulation menu
The next main menu allows various COFDM output
modulation parameters to be selected:
COFDM >>
8MHz 64QAM
GI:1/8
FEC:3/4
The parameters that can be selected in this menu
and their possible values are as follows:
• Bandwidth of the COFDM signal: 7MHz or
8MHz.
• Modulation : QPSK, 16QAM or 64QAM.
• Guard interval : 1/4, 1/8, 1/16 or 1/32.
• FEC : 1/2, 2/3, 3/4, 5/6 or 7/8.