UNITY 4600 USERS MANUAL

Table 1.2: Transport-In Options

 

 

 

 

 

Characteristic

 

 

Specification

DVB-QPSK Receiver Option (No RF Switch)

 

 

 

 

 

 

RF Input

 

 

 

 

 

 

 

 

Input Impedance

75Ω unbalanced

 

 

Input VSWR, 75-Ωsystem

< 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 Eb/N0 @ Quasi-error-free threshold

Per EN300 421:

 

 

(less than one uncorrected error-event per

QPSK R=1/2:

4.5 dB,

 

hour)

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

Unitless metric SIGNAL corresponds to input power as follows:

(locked to carriers or not)

 

 

 

 

 

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

 

 

 

 

 

800032-01 Rev. F

6

www.wegener.com

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Wegener Communications 4600 manual Transport-In Options, Characteristic

4600 specifications

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