Wegener Communications UNITY 4600 User Manual
Page 15
Unity 4600 User’s Manual
www.wegener.com
7
800032-01 Rev. F
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
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 Protocols
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 discharges (per
IEC 801-2) whether port is selected or not
RF Tuning
Input Frequency Range
950 to 2150 MHz
LO Leakage at Input
≤
-60 dBm
Symbol-rate Range
1 to 30 Msps (may be limited by Transport Rate limits)
Tuning Resolution
10 kHz
Input Signal Level Range
-25 to -65 dBm
Signal Level Warning Limits
warns within +10/-5 dB of upper limit and +5/-10 dB of lower limit
Maximum Aggregate Input Power
0 dBm max
Demodulator/FEC
Modulation
1. DVB-QPSK (
α
=.35) per EN 300 421
2. Advanced "Turbo-QPSK" (
α
=.20 default; R=½, ¾) per Broadcom
proprietary protocol
3. Advanced "Turbo-8PSK" (
α
=.20 default; R=2/3, 5/6, 8/9) per
Broadcom proprietary protocol. [R=¾ Type I and II; contact
factory.]
4. Advanced "Turbo-16QAM" (
α
=.20 default; R=¾) per Broadcom
proprietary protocol
Carrier acquisition range
±1 MHz or ± 10% of symbol-rate QPSK, whichever is greater
Table 1.2: Transport-In Options
Characteristic
Specification