Tektronix MTS4000 MPEG, Техническое описание, Страница: 24 / 41

Speci fi cations
Discontinued option
MTS4000 Option S2 is no longer available and has been replaced by Option DS2.
For convenience, the speci
fi cations for Option S2 are shown below.
Table 14: DVB-S2 card characteristics (Option S2 only) 1
Characteristic Description
Input frequency range 950 MHz to 2150 MHz with 1 MHz step size
Input signal amplitude range, typical –60 dBm to –30 dBm for a CBER of <1
e-6
Use high quality shielded cables and higher input level to prevent ingress of interfering
signals. This is particularly important at the tuned frequency where the input circuitry is
by design most sensitive.
Modulation format QPSK in accordance with DVB-S (ETSI EN 300 421)
QPSK, 8PSK, 16APSK and 32APSK in accordance with DVB-S2 (ETSI EN 302 307)
including Constant, Adaptive and Variable Coding and Modulation (CCM, ACM and VCM)
Modulation baud rate 1 MBaud min, 60 MBaud max
Maximum symbol rate: 60 MBaud in QPSK, 45 MBaud in 8PSK, 39 MBaud in 16APSK,
and 32 MBaud in 32APSK.
Code rate DVB-S: 1/2, 2/3, 3/4, 5/6, 6/7, 7/8
DVB-S2: 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
FEC modes Viterbi and Reed-solomon in accordance with DVB-S
LDPC and BCH in accordance with DVB-S2
Short and Normal FEC blocks in accordance with DVB-S2
Roll off 0.2, 0.25, 0.35
Connector type F type
Input termination impedance 75 Ω nominal
Input return loss, typical >6 dB, 950 MHz to 2150 MHz
LNB supply voltage
selectable; 13.0 V ±1.5 V or 18.0 V ±1.5 V, with 100 Ω , 5 watt resistor load
LNB supply maximum current 200 mA
LNB 22 kHz signalling frequency 22 kHz ±20%
LNB 22 kHz signalling amplitude 800 mV
p-p
with 100 Ω load
LNB mode DiSEqC 2
10 MTS4000 Speci fi cations and Performance Veri fi cation