TANDBERG TT1260 Reference Manual page 111

Parameter
Power
Input power level per carrier
Total L-band input power
Modulation
Signal type
Convolutional FEC rates
Symbol rate range
Symbol rate step
Symbol rate lock range
Bit-rate R188 range
Eb/No ratio
Miscellaneous
LNB phase noise requirement
Oscillator power at the L-band input
LNB power and control
Table B.14 shows the Eb/No requirements to ensure error free
demodulation for all supproted FEC rates.
Table B.14: Eb/No Requirements. QPSK/8PSK/16QAM Modulator - Demodulator in IF Loop
Modulation
QPSK 1/2
QPSK 2/3
QPSK 3/4
QPSK 5/6
QPSK 7/8
8PSK 2/3
8PSK 5/6
8PSK 8/9
16QAM 3/4
16QAM 7/8
Eb/N ratio is referred to user bit-rate R188.
0
10
EN 300 421: Digital broadcasting systems for television, sound and data services; Framing structure, channel
coding and modulation for 11/12 GHz satellite services.
11
EN 301 210: Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for Digital
Satellite News Gathering (DSNG) and other contribution applications by satellite.
Reference Guide: TT1260 Contribution Receiver
ST.RE.E10100.1
Specification
C = Co + 10*Log(Rs) + 60 dBm
where
C = Carrier power
Co = Carrier power spectral density, -130 < Co < -105 dBm/Hz
Rs = Symbol-rate (MSymbol/s)
< - 20dBm
QPSK per EN 300 421 10
QPSK, 8PSK and 16QAM per EN 301 210
QPSK: 1/2, 2/3, 3/4, 5/6, 7/8
8PSK: 2/3, 5/6, 8/9
16QAM: 3/4, 7/8
Rs = 1.0 to 45.0 MSymbol/s
1 Symbol/s
± 200 ppm
See Table B.15
See Table B.14
See Table B.17
< -55 dBm, F = Fc + 479.5 MHz
See Table B.16
Eb/No ratio (dB) for demodulator output BER < 1E-7
Rs < 20 Msymbol/s
3.9
4.4
4.9
5.4
5.8
6.3
8.3
8.8
8.4
10.1
Technical Specification
11
Rs > 20 MSymbol/s
3.9
4.5
5.1
5.8
6.4
6.5
8.8
9.8
8.6
11.1
Page B-13