Wegener UNITY4650, Руководство пользователя

Страница: 15 / 92

Unity 4650 User’s Manual
wegener.com 15 800034-01 Rev. A
LNB DC POWER (supplied on RF center conductor)
Activation User- or network-controlled selectable: ON or OFF
Voltage ~ +18.7 VDC nominal at no loading, +18.0 VDC min. at max
loading
Current (full load) 350 mA max
Short-circuit protection Thermal fuse, tripping at ~500 mA.
European “Universal LNB” Software may be upgraded for “Universal Single LNB” polar-
ization and freq-band control per ASTRA recommendation
DVB-QPSK RECEIVER WITH 4-PORT RF SWITCH OPTION
SWITCHED RF INPUTS
Input Impedance 75
Ω
unbalanced
Isolation, port-to-port > 45 dB, 950-1450 MHz
> 40 dB, 1450-2150 MHz
Input VSWR, 75-
Ω
system, selected port < 2.6:1 (7 dB R.L. min), 950-1450 MHz
Not guaranteed, 1450-2150 MHz
Input VSWR, 75-
Ω
system, unselected
port
< 2.0:1 (10 dB R.L min), 950-1450 MHz
Not guaranteed, 1450-2150 MHz
Surge Resistance Guaranteed survival from up to 10 direct-coupled 8kV dis-
charges (per IEC 801-2) whether port is selected or not
RF TUNING Same as QPSK option described above
DEMODULATOR/FEC Same as QPSK option described above
LNB DC POWER Supplied on separate 2-pin header. Performance otherwise the
same as QPSK option described above
TURBO PSK RECEIVER OPTION, BROADCOM PROTOCOL
RF INPUT
Input Impedance 75
Ω
unbalanced
Input VSWR, 75-
Ω
system < 1.9:1 (10 dB R.L. min), 950-1450 MHz
< 1.9:1 (10 dB R.L. min), 1450-2150 MHz
Surge Resistance Guaranteed survival from up to 10 direct-coupled 8kV dis-
charges (per IEC 801-2)
Table 2: Transport In Options
Characteristic Specification