Wegener Communications UNITY 4600 - Manual (Page 14)

U NITY 4600 U SER ’ S M ANUAL
800032-01 Rev. F 6 www.wegener.com
Table 1.2: Transport-In Options
Characteristic Specification
DVB-QPSK Receiver Option (No RF Switch)
RF Input
Input Impedance 75 Ω unbalanced
Input VSWR, 75- Ω system < 2.1:1 (9.0 dB R.L. min), 950-1450 MHz
< 3.0:1 (6.0 dB R.L. min), 1450-2150 MHz
Surge Resistance Guaranteed survival from up to 10 direct-coupled 8kV discharges (per
IEC 801-2)
RF Tuning
Input Frequency Range 950 to 2150 MHz
LO Leakage at Input ≤ -50 dBm
Symbol-rate Range 2 to 45 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 -5 dBm min
Demodulator/FEC
Modulation QPSK ( α =.35) per DVB (EN 300 421)
Carrier acquisition range ±1 MHz or ± 10% of symbol-rate QPSK, whichever is greater
Max E
b
/N
0
@ Quasi-error-free threshold
(less than one uncorrected error-event per
hour)
Per EN300 421:
QPSK R=1/2: 4.5 dB,
QPSK R=2/3: 5.0 dB,
QPSK R=3/4: 5.5 dB,
QPSK R=5/6: 6.0 dB,
QPSK R=7/8: 6.4 dB
RF Power Level Estimator
(locked to carriers or not) Unitless metric SIGNAL corresponds to input power as follows:
above -25dBm: Extrapolated from 90 up to 100+
-25dBm: 90 -55dBm: 30
-35dBm: 70 -65dBm: 10
-45dBm: 50 no signal: <0
below -65dBm: Extrapolate from 10 down to <0
Accuracy: unit to unit <±5 dBm; over frequency <±10 dBm
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" palarization
and freq-band control per ASTRA recommendations