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Technical Specification
Page B-12 Instruction Manual: TT1260 Standard Definition Professional Receiver/Decoder
ST.TM.E10100.1
B.5.2 8PSK/16QAM Satellite Receivers
Table B.13: QPSK/8PSK/16QAM Satellite Receiver Input Specification
Parameter Specification
L-band input
Safety status SELV
Number of inputs 2
Input connector type F-type, female 75 W
Input impedance 75 W
Return loss > 7 dB
8
Isolation between inputs 25 dB min
9
Frequency
Tuning range
10
Fc = 950 to 2150 MHz
Tuning step 100 kHz
Carrier frequency search range 0 to ± 3 MHz
11
Receive spectrum sense Normal and inverted
Power
Input power level per carrier 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)
Total L-band input power < - 20 dBm
Modulation
Signal type QPSK per EN 300 421
12
QPSK, 8PSK and 16QAM per EN 301 210
13
Convolutional FEC rates QPSK: 1/2, 2/3, 3/4, 5/6, 7/8
8PSK: 2/3, 5/6, 8/9
16QAM: 3/4, 7/8
Symbol rate range Rs = 1.0 to 45.0 MSymbol/s
Symbol rate step 1 Symbol/s
Symbol rate lock range ± 200 ppm
Bit-rate R188 range See Table B.15
Eb/No ratio See Table B.14
Miscellaneous
LNB phase noise requirement See Table B.17
Oscillator power at the L-band input < -55 dBm, F = Fc + 479.5 MHz
LNB power and control See Table B.16
8
Selected input. The non-selected input is reflective.
9
This specification relates to 1) the isolation across inputs (loop-through isolation) and 2) isolation from the non-
selected to the selected input measured at the demodulator input.
10
The displayed frequency is either L-band or SHF dependent on the LNB frequency and the SHF carrier frequency set
in the satellite receiver input menu.
11
Subject to minimum search range 0.1*Rs (QPSK, 16QAM), 0.05*Rs (8PSK)
12
EN 300 421: Digital broadcasting systems for television, sound and data services; Framing structure, channel
coding and modulation for 11/12 GHz satellite services.
13
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.