Teleste CX3 User Manual

User Manual CX3
59300625 Rev.001

1.2.2018 1(4)

CX3 1.2 GHz Universal amplifier

The CX3 is a compact dual output amplifier. It has two gain and slope modes
that makes this product universal. Output performance meets the requirements
of forward and return path DOCSIS 3.1 signals.

Installation

Wall mounting

Adjustments are using electrical circuits that are controlled with push buttons. A
high gain return amplifier with 85/204 MHz pivot frequencies, variable slope
control is fixed built on the mother board.

Key features include: electrical adjustments, 1.2 GHz forward path, GaN
technology, 65/85/204 MHz return channel, high gain/low gain selection,
flat/sloped output selection, push button and LED indication for adjustments,
cable simulator option at input, and 2 output ports.

Plan the installation with enough clearance to install the cable and cable
connectors. The amplifier should be installed vertically so that the external
cables are facing downwards . The CX3 enclosure c lassification is IP67. When
installing the amplifier in its final location, make certain that it has adequate
ventilation on all sides. In particular, it is necessar y to provide at least 150 mm
of room above and below the node for air circulation.

Drill two mounting holes 233 mm apart in the mounting surface. Figure 1 depicts
the locations of the wall mount brackets (Fig. 1, Pos. B). Select appropriate
length 5 mm mounting bolts (not supplied) and washers. Tighten the mounting
bolts. The amount of torque required depends on the mounting surface.

The lid retaining bolts are fasten with a 10 mm hex nut driver. Use no more than
3 Nm torque. Before closing the lid it should be checked that:

• nothing is trapped between the lid and the case

• all case gaskets are intact and in their correct positions

• lid seats evenly on the rubber gasket

The CX3 housing should be grounded from an approved earth point to the
housing ground lug (Fig. 1, Pos. A).

User Manual CX3
59300625 Rev.001

1.2.2018 2(4)

Powering

NOTE! To reduce the risk of electric shock, do not remove the
shielding cover of the power supply unit if it is connected. All
electrical installations must be carried out by authorized and
competent technicians in accordance with the national or regional
electrical regulations.

Common precautions:

• The CX3 amplifier is intended for install ation in restricted access locations
(dedicated equipment rooms, equipment closet, or the like)

• Operate the device only on the specified supply voltage.

• The CX3 must never be operated without its power supply unit shielding

cover.

• The CX3 has no s eparat e power s witch thus the po wer plug m ust be easil y
accessible.

• Disconnect the power cor d by the connector only. Never pull on the cab le
portion of the power cord.

• Do not place or drop heavy or sharp-edged objects on the power cord.

• The power must be disconnected when installing or removing the CX3.

Additional safety requirements for Norway and Sweden:

• Equipment connected to the protective earthing of the buildi ng installation
through the mains connect ion or thr ough other eq uipm ent with a c onnect ion
to protective earthi ng and to a cable distr i but ion system using coaxial c a bl e,
may in some circumstances create a fire hazard. Connection to a cable
distribution system must be provided through a device provid ing electrical
isolation below a certai n frequenc y range (galvanic isolator, see E N 60728-

11).

The CX3 is available either with a remote or local powering options. The
following subsections describe the differences.

CX3 with remote powering: (27...65 V AC)

If CX3 is a remotely powered, ensure that the power cord entry port is plugged.
The supply voltage of the remote powered CX3 (27. ..65 V AC) is supplied via

coaxial cables. Feed throu gh capacity is max. 7 A / port. On deliv ery, RF ports
are provided with fuses.

CX3 with local powering: (205…255 V AC)

The locally powered CX3 is c onnected to the mains voltage of 205…255 V AC
via its own pow er cord. The po wer supply unit is double shield ed and does not
require separate grounding. However, ensure that the housing of the CX3 is
properly connected to the earth in order to meet safety requirements. Proper
grounding will also im prove protection from the effects of interference and th us
increase the overall reliability of the system.