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.
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.
Installation
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 classification is IP67. When
installing the amplifier in its final location, make certain that it has adequate
ventilation on all sides. In particular, it is necessary to provide at least 150 mm
of room above and below the node for air circulation.
Wall mounting
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 installation 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 separate power switch thus the power plug must be easily
accessible.
•Disconnect the power cord by the connector only. Never pull on the cable
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 building installation
through the mains connection or through other equipment with a connection
to protective earthing and to a cable distribution system using coaxial cable,
may in some circumstances create a fire hazard. Connection to a cable
distribution system must be provided through a device providing electrical
isolation below a certain frequency range (galvanic isolator, see EN 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 through capacity is max. 7 A / port. On delivery, RF ports
are provided with fuses.
CX3 with local powering: (205…255 V AC)
The locally powered CX3 is connected to the mains voltage of 205…255 V AC
via its own power cord. The power supply unit is double shielded 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 improve protection from the effects of interference and thus
increase the overall reliability of the system.
User Manual CX3
59300625 Rev.001
1.2.2018 3(4)
Interfaces
9918012
Figure 1 CX3 housing details
1) Input port
2) Input test point -20 dB
3) Input diplex filter module
4) Output diplex filter module
5) Output test/injection point -20 dB
6) Output port 1
7) Output module
8) Output port 2
9) Local user interface
10) Fuses (remote powered model only)
Local user interface
The CX3 amplifier has a local user interface consisting of a 4*7-segment display
and 3 buttons. This local UI is used for basic configuration. During the power-up
"Teleste" text scrolls through the display. Pressing “Enter” button wakes up the
display and activates the first menu item. If there is no button activity during ~3
minutes, the display will go dark.
The “Up” / “Down” buttons browse through the menu items, The “Enter” button
selects the item for modification / reading, “Up” / “Down” changes the value of a
parameter and “Enter” returns to the menu.
User Manual CX3
59300625 Rev.001
1.2.2018 4(4)
Menu and block diagram
Copyright © 2018 Teleste Corporation. All rights reserved. Teleste and the Teleste logo are
registered trademarks of Teleste Corporation. Other product and service marks are property of their
respective owners. Teleste reserves the right to make changes to any features and specifications of
the products without prior notice. Although the information in this document has been reproduced in
good faith, the contents of this document are provided “as is”. Teleste makes no warranties of any
kind in relation to the accuracy, reliability or contents of this document, except as required by
applicable law.
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