U 159: Ultra-dense IP to QAM modulation

Based on the U 100 head-end series, the U 159-x IP to QAM module offers ultra-dense QAM modulation for cable TV networks with sophisticated features. The unique architecture of the U 100 head-end series enables highest density with highest reliability for professional technical environments. Hard- and software based redundancy mechanisms are developed in close connection with our customers to meet the requirements for any operator!
While the U 159 and U 159-S are plugin modules for U 100 base units, the U 259-O was designed with hardened components for outdoor street cabinet applications even at higher temperatures. It has all features of our well known U 159 module, capable of converting up to 64 QAM carriers out of the IP inputs. All connections and control elements are available from the front of a 19 inch housing, as also is the connector for local DC powering.

Modulation facts

up to 192 QAM channels per 19“ RU (except U 259-O)
up to 64 QAM channels per module
flexible input configuration with four 1G data interfaces (SFP)
reception of SPTS and MPTS
High output level
excellent signal quality thanks to proven Direct Digital technology
integrated 20 dB test point
static or dynamic NIT, NIT out of PID
low power consumption per channel
software support included

Ordered as required*

data ports (1 included), max. 3 additional ports depending on required input data ratio
internal redundancy function for link and source redundancy
RF channel package (16 QAM channels included), 8 additional channels per package
powerful multiplexer, SPTS and MPTS multiplexed to QAM channels
SFP modules available
secure management via SSL (https)
authentication via RADIUS server
scrambling of transmitted QAM channels according CSA (U 159-S)
QAM probe with on-board decoder for output signal analysis (via hardware upgrade U 159 D)

Different modules - a variety of features

Signal processing

IP input SPTS / MPTS via four 1G SFP
management via redundant management ports
powerful transport stream processor for multi- plexing, NIT calculation, filtering, scrambling
FPGA based digital QAM modulator, each out- put channel separately configurable
20 dB test point per module

Redundancy options

N+1 or 1+1 hardware redundancy controlled by U 100-C management module
active link redundancy with surveillance of the redundant signal link
active source redundancy with surveillance of the redundant signal source
each signal source can get different priority with adjustable hysteresis to avoid polling
service based redundancy, i.e. one missing service in TS leads to switch over to redundant TS
all redundancy switching options can be executed manually or automatically

QAM modulation

up to 64 QAM channels per output
high output level to enable passive combining and avoiding a single point of failure
MER ≥ 44 dB, shoulder attenuation > 56 dB
output frequency up to 1006 MHz

Hardware

The U 159 module consists of the central module with the receiving part, the TS processing and the QAM modulator and the active backplane with the RF amplifier, SFP ports and all further interfaces. The hardware is designed to enable the exchange of the central module without affecting the wiring of the backplane, which simplifies the technician's daily work.