L2101 &L2102 Integrated Receiver Decoder Instruction Manual – Issue 1 – September 2003
Page
21 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
Registered in London No. 2074604 Web: www.linkres.co.uk
Fax: +44 (0) 1923 241 357
4 Characteristics and Specifications
4.1 Receiver Input Specifications
The following tables summarize the features and specifications of the various receiver input
options available for the L2201 and the L2202 Integrated Receiver Decoder:
•
QPSK input option,
•
DNSG input option,
•
QAM input option,
QPSK Input Features and Specifications
FEATURE
SPECIFICATION
L-Band input
950-2150 MHz
L-Band Loopthrough output
950 – 2150 MHz ± 3dB
Input level
-65 to –25 dBm
Symbol Rate
1 - 45 Msymbols/sec continues
Symbol Rate acquisition
range
±
70 ppm
Carrier acquisition range
±
1/4 Symbol Rate
BER (Quasi Error Free after
Reed Solomon)
2 x 10-4 for Eb/No = 5.5 dB, after Viterbi 3/4
Viterbi Decoding Rates
1/2, 2/3, 3/4, 4/5, 5/6, 7/8, 8/9
Viterbi Constraint Rate
7
Viterbi Rate Recovery
Automatic
Reed Solomon decoding
204, 188,
De-interleaving Yes
Digital AGC
Yes
LNB Control Voltage:
Off, 14V, 18V, (350 mA maximum)
Polarization 22
kHz/Off
Spectral Inversion
Automatic