L2101 &L2102 Integrated Receiver Decoder Instruction Manual – Issue 1 – September 2003
Page
51 of 126
Link Research Ltd. 23 Watford Metro Centre, Dwight Road, Watford, Hertfordshire, WD18 9XA, England.
Tel: +44 (0) 1923 200 900 Customer Support and S44 (0) 1923 200 909
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Fax: +44 (0) 1923 241 357
DSNG
QPS
K
QAM
OPTION
DESCRIPTION
;
VHF/UHF
Frequency
VHF/UHF-Band Frequency Selection
Displays the expected carrier frequency of the received input signal
at the QAM (DVB-C) application.
;
;
;
Symbol Rate
Symbol Rate Setup
The Symbol Rate for a group of station programs is configured
according to the broadcast program parameters and the specific
ranges available in your IRD.
The available Symbol Rate range is:
QPSK and DSNG 1-45
configuration: 1 to 45 Mbaud/sec.
QAM
configuration: 1 to 7.2 Mbaud/sec.
If the Bit rate information is provided but no Symbol Rate information
is given, the Symbol Rate may be calculated by the equations
provided in Appendix B.
NOTE
It is important to input the Symbol Rate accurately, including all the
decimal places that are given.
;
QAM Mode
QAM Mode Select
Selects the QAM Mode of operation for the QAM IRD.
Available options:
16_QAM, 32_QAM, 64_QAM, 128_QAM, 256_QAM
.
;
Modulation
Mode
Modulation Mode Select
Selects the modulation mode for the DSNG IRD. Available options:
MOD – QPSK
: Quadrature Shift Keying Modulation.
MOD – 8PSK
: Eight Phase Shift Keying Modulation.
MOD – 16 QAM
: 16 Quadrature Amplitude Modulation.
Automatic
: Automatic Selection of modulation.
;
Nyquist Filter
Roll-Off
Nyquist Filter Type Selection
Selects the roll-off parameter for the Nyquist filter.
Available options:
35%
: 35% roll-off parameter.
25%
: 25% roll-off parameter.
Automatic
: Automatic selection of the roll-off parameter (25% or
35%).
