KATHREIN Professional Digital Headend - 4way/8way Transmodulator

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KATHREIN's innovative Digital Professional Headend. Modern digital processing, as offered by the UFOcompact plus® system, allows processing of many different signal types in a minimal space with high building density.

The principle of 'software-defined-radio' has been followed in the design of new conversion formats, combining maximum flexibility with the highest reliability and low cost.

The new converters are designed with four RF inputs, followed by a broadband DiSEqC RF capability to ensure a fully flexible internal signal distribution. The high-performance program and PID filters, along with the available multiplexing feature, provide maximum flexibility to users.

The interface of the base from which DVB transport streams go to an integrated part of any UFOcompact plus® model. General system operations on specific models can be routed to other embedded system mounts via this interface. One of the first functions, which is treated in this way, relates to decoding transport streams that run from a conversion modulus model using the CI UFZ 896.

This unit will be followed by additional special mounts, including decoders, Edge-QAM / COFDM modules and general-purpose interface units. Durable aluminum housings provide excellent thermal characteristics. Besides, the new UFOcompact plus® models are characterized by their extremely low power consumption.

Great importance has been given to user friendliness and serviceability. All UFOcompact plus® units have Push-Pull technology and are capable of connecting. All new models are equipped with voltage and temperature sensor technology. When the limits of specific operating parameters are exceeded, then these enclosures will be closed for security reasons. As soon as the parameters reach standard values, the units will open again automatically. A status LED informs the operator of the operating status of each module.



4way - 8way-transmodulator DVB-S/S2 – DVB-C (J.83A)



  • 8-way (UFO 878) or 4-way (UFO 874) Transmodulator DVB-S(2) - DVB-C (QPSK/8PSK - QAM)
  • Flexible baseband data exchange with adjacent modules such as UFZ 896 for decryption
  • Excellent technical data (MER ≥ 45 dB) with FPGA processed direct transmodulation
  • Four Sat-IF inputs with DiSEqC™1.0 functionality for Sat multi-switches; can be flexibly switched to any of the four or eight front ends
  • Comprehensive base band signal processing with e.g. extended programme filter functionality
  • Four or eight DVB-C compliant output channels (J.83A)
  • High energy efficiency, power consumption: typ. 14/24 W at 12 V


Technical Data

Feature Unit Value
Type   UFO 874
Sat-IF input   4 x F-type connector, 75 Ohm
Frequency range MHz 950 ... 2,150
Decoupling TER/SAT typ. dB > 25
Return loss dB Typ. 10
DiSEqC™ 1.0   Vert./Horiz., Low/High; Sat.Pos. (A/B/C/D)
Switch-over polarisations V/kHz 14/18, 0/22
Remote feed current mA Max. 60 (per input)
Front end    
DVB-S2   4 x
Frequency steps MHz 1 (950 ... 2,150 MHz)
AFC adjustment range MHz ± 3 (Symbol rate < 10 Ms/s) ± 5 (Symbol rate > 10 Ms/s) (950 ... 2,150 MHz
Input level range dBµV 60 ... 110
Permissible level difference dB 12
Demodulation DVB-S    
Standard   EN 300 421 (1)
Input symbol rate QPSK MS/s 1 ... 45
Code rate (Viterbi)   1/2, 2/3, 3/4, 5/6, 6/7, 7/8
Roll off % 35
Demodulation DVB-S2    
Standard   EN 302 307 (2)
Input symbol rate QPSK MS/s 2 ... 47
Code rate (LDPC)   1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
Input symbol rate 8PSK MS/s 2 ... 31.5
Code rate (LDPC)   3/5, 2/3, 3/4, 5/6, 8/9, 9/10
Roll off % 20/25/35
System interfaces    
Data interface MBit/s net 800
Control interface Mbit/s 12
TS routing to backplane   Max. 2 x 16 transport streams (right and left)
MPEG-TS processor    
Programme filter    
PID filter    
PSI/SI processing   Cable-NIT, LCN, PCR correction, CAT
Stuffing   automatic
QAM modulator    
Output channels   4 x DVB-C (J.83A)
QAM constellation QAM 16, 32, 64, 128, 256
Symbol rate MS/s 2.25 ... 7.25
Roll off % 15
RF output    
DVB-C output   1 x F-type connector/75 Ohm
Frequency range MHz 47 ... 1,006 (fine adjustment in 125 kHz steps)
Frequency range (channel list) MHz 47 ... 86/110 ... 862 (settable over the channel list)
Return loss dB 14 (47 MHz) -1.5 dB/oct.
Output level dBµV 97
Setting range output level dB -20 (in 0.5 dB steps)
Level stability dB ± 0.8
Frequency stability ppm 35
MER dB >= 45
Roll-off attenuation dB >= 60 (at standard level)
Spurious emissions dB >= 60
System data    
Power consumption W Typ. 14 (on 12 V)
Temperature range °C -20 ... +50
Safety cut-off °C > 70
Dimensions (H x W x D) mm 265 x 36 x 220
Weight kg 1.1
VPE 1   1
EAN 1   4021121517860
VPE 2   10
EAN 2   4021121517877
Customs tariff number   85256000


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