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Page B-10 Instruction Manual: TT1260 Standard Definition Professional Receiver/Decoder
ST.TM.E10100.1
B.5 Input Specifications
B.5.1 QPSK Satellite Receivers
General
Table B.10: QPSK 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 > 9 dB
Transmission isolation between
inputs
> 40 dB
4
Isolation across inputs 40 dB min
Frequency
Tuning range
5
Fc = 950 to 2150 MHz
Tuning step 100 kHz
Carrier frequency search range 0 to ± 5 MHz
Receive spectrum sense Normal and inverted
Power
Input power level per carrier -65 to –25 dBm
Total L-band input power < -10 dBm
Oscillator power at the L-band input < -63 dBm, F = Fc and Fc/2
Modulation
Signal type QPSK per EN 300 421
6
Convolutional FEC rates 1/2, 2/3, 3/4, 5/6, 7/8
Symbol rate range Rs = 1.0 to 45.0 MSymbol/s
Symbol rate step 1 Symbol/s
Symbol rate lock range ± 120 ppm
Bit-rate R188 range See Table B.9
Eb/No ratio See Table B.11
Miscellaneous
Phase noise tolerance SSB phase-noise power spectral density < K + 8.5*Log(Rs)
Phase noise power spectral density of the form C – 20*Log(dF)
dF = Frequency offset from carrier = 10 kHz
Rs = Symbol-rate (Msymbol/s)
LNB power and control See Table B.12
4
Isolation to the selected input from the non-selected input obtained at the demodulator input.
5
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.
6
EN 300 421: Digital broadcasting systems for television, sound and data services; Framing structure, channel coding
and modulation for 11/12 GHz satellite services.