Ascent Communication Technology ARF120B Series User manual

ARF122B
1.2GHz MDU
RF Amplifier
Quick Reference
Guide
Revision A

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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ACT ARF122B RF Amplifier
Quick Reference Guide
ACT Document Number: ACT AT5026 External Modulation Optical Transmitter
Quick Reference Guide Revision A
Copyright © 2016 Ascent Communication Technology Limited.
All rights reserved. Reproduction in any manner whatsoever without the express written permission of Ascent
Communication Technology is strictly forbidden.
This document is produced to assist professional and properly trained personnel with installation and maintenance
issues for the product. The capabilities, system requirements and/or compatibility with third-party products
described herein are subject to change without notice.
For more information, contact ACT: [e-mail]
Revision History
Revision Date Reason for Change
A 11/13/2016 Initial release

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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Table of Contents
1 Overview ................................................................................................................................ 4
1.1 Features·························································································································· 5
1.2 Block Diagram················································································································· 5
1.3 Specifications ················································································································· 5
2 Installation and Configuration ................................................................................................ 7
2.1 Precautions ···················································································································· 7
2.2 Equipment Inventory ····································································································· 7
2.3 Packaging and Transportation························································································ 7
2.4 Opening the Unit············································································································ 8
2.5 Unit Installation Points··································································································· 8
2.6 Install and Check the Accessories··················································································· 8
2.7 System Power and RF Port Connectors·········································································· 8
RF Connectors ···················································································································· 10
2.8 Balancing and Setup····································································································· 10
2.9 Product Split Upgrade ·································································································· 13
2.10 Closing the Unit·········································································································· 14
3 Product Warranty................................................................................................................. 14

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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ARF120B Series 1.2G 1 or 2 RF outputs, GaAs MDU amplifier is part of ACT Advanced Fiber Deep HFC solution,
which has been designed to deliver interactive CATV, high capacity DOCSIS and other advanced services. The
cost effective MDU amplifier platform helps operators expand bandwidth of their existing HFC network while
minimizing capital investment. The ARF120B compact housing has compact housing with embedded RF
module and is suitable for MDU, FTTB or FTTC applications with outputs up to 108 dBµV.
The ARF120B 1.2 GHz MDU amplifier has field upgradeable diplexers and filters with JXP style plug-in PADs
and EQs along with plug-in diplex filter for band split upgrade to DOCSIS 3.1.
ARF120B amplifier uses GaAs technology which offers the excellent CTB and CSO performance. Both
output level and slope can be adjusted using standard JXP PADs to minimize the spares. It suits the last
mile fiber deep access networks. It has low power consumption and supports local or remote power options.
Combined with ACT’s converged headend AH1000 optical system and AON node series, ARF120B is an ideal
product to provide MSOs with an economical, flexible HFC access solution.

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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 Supports 1.2 GHz bandwidth
 On site changing freq small and exquisite
 GaAs technology in use
 Improved ESD and Surge protection
 Low noise figure
 Standard JXP plug-in PADs for all adjustments of attenuation and equalization
 Second output can be selected via splitter or tap
 uency split
 Compact design,
Forward Path Specifications
Item
Value
Pass Band
85/258 MHz to 1208 MHz
Gain
42 dB
Frequency Response
±0.75 dB
Input Attenuator Control Range
0 dB to 20 dB, 1 dB step
Input Equalizer Control Range
0 dB to 22 dB, 1 dB step
Cable Simulator
0 dB to 9 dB, 1 dB step
Mid-stage Slope
0 dB to 10 dB, 1 dB step
Mid-stage Gain
0 dB to 10 dB, 1 dB step
Umax(112 QAM Chs)
108 dBµV
Return Loss
16 dB @ 85 MHz to 1000 MHz
14 dB @ 1001 MHz to 1200 MHz

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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RF Test Point
-20 dB
Noise Figure
5.6 dB
Group Delay
2 ns
Output Level, CTB CENELEC 41 Chs
112.0 dBµV
Output Level, CSO CENELEC 41 Chs
113.0 dBµV
Output Level, XMOD CENELEC 41 Chs
119.0 dBµV
CTB 105 / 72 Chs
66.0 dBc
CSO 105 / 72 Chs
63.0 dBc
XMOD 105 / 72 Chs
59.0 dBc
Return Path Specifications
Item
Value
Pass Band
5 MHz to 65/204 MHz
Gain
25 dB
Input / Output Gain Control Range
0 dB to 20 dB, 1 dB step
Output Equalizer
0 dB to 12 dB, 1 dB step
Frequency Response
±0.75 dB
Return Loss
18 dB
RF Test Point
-20 dB
Noise Figure
5.6 dB
Output Level,
119.0 dBµV
BER
<1 x 10
-8
MER
>35 dB
General Specifications
Item
Value
Power Consumption (High Gain / Low Gain)
14.5 W
Supply Voltage
26 V
AC
to 65 V
AC
RF Connectors
F-female
Dimensions ( W × H × D)
230 mm × 164 mm × 84 mm
Weight
1.5 kg
Water/Dust Ingress Protection Rating
IP 54
Operating Temperature
-40 °C to +55 °C
Storage Temperature
-40 °C to +80 °C
Relative Humidity
5 % to 95 % (non-condensing)
EMC Compatibility
EN 60728-2
Safety
EN 60728-11
ESD / Surge
6 kV / 6 kV
Note: Unless otherwise noted, all specifications reflect typical performance and are
referenced to 20°C.

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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•Ensure adequate cooling and ventilation as specified.
•The installation and operation manual should be read and understood before units are put into use.
•Dangerous voltages are present within the unit at all times. Mains power kills.
•Do not operate unit without all covers and panels properly installed. Mains power kills.
Cleaning
Use only a damp cloth for cleaning front panel. Use a soft dry cloth to clean top of unit. Do not use spray cleaner of
any kind.
Overloading
Overloading wall outlets and extension cords can result in a risk of fire or electric shock. Use approved electrical
cords.
Damage requiring service
Unplug unit and refer servicing to Ascent Communication Technology qualified service personnel only.
Servicing
Do not attempt to service this unit yourself. Refer all servicing to Ascent Communication Technology qualified
service personnel only.
On receiving your new ARF122B, you should carefully unpack and examine the contents for loss or damage that
may have occurred during shipping. Refer to warranty registration if loss or damage has occurred. The ARF122B
should consist of the following:
Qty Description
1 ARF122B unit
1 Product user manual ( Optional )
1 Certificate of performance (includes test result sheet)
Keep all packing boxes and packaging of the ARF122B for future transport.
Use only the original packaging of the ARF122B when transporting. This packaging has been specifically designed to
protect the equipment.

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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After undoing the center lid bolt, lift the lid of the unit and fold it open. If the case will not open with normal force,
a flat-bladed screwdriver can be used to lever the case apart. The screwdriver must be carefully inserted between
the case halves.
•The unit must always be mounted with the heat dissipating fins vertical and nothing obstructing the
flow of air through the fins.
•A clearance of 50 mm must be left between the sides of the unit and any obstruction.
•The unit MUST be grounded.
•If attenuator and or equaliser plug-in modules are incorrectly installed, the frequency response of the
unit may be negatively affected. Ensure that the plug-in modules are installed in the correct
orientation and are pushed in firmly.
The AC input power to the amplifier is shown as below.

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
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When plugging the RF and power adaptors into AC input power port above, please make sure that the centre pin is
between 30 mm and 35 mm when measured from the seating area of the connector to the tip of the centre pin
(see below). If the pin is any longer there is a risk of not achieving a proper seal and/or damaging the ARF122B.
Centre pin length
Note:
RF adaptors are factory installed.

ARF122B 1.2GHz MDU RF Amplifier
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 10 of 15
RF Connectors
When plugging the RF and power adaptors into ports 1 through to 3, ensure that the centre pin is between 30 mm
and 35 mm long. If the pin is any longer there may be a risk of damaging the unit. The sealing O-ring must be on
the connector and in good condition (see below).
Sealing O-ring location and centre pin length
Apply water-tight, adhesive-lined heat shrink tubing (as per manufacturer’s instructions) to cover the whole
connection from the unit flange to the cable jacket (see below). Failure to do so will result in water ingress into the
amplifier inside.
RF connector sealing
1. Balancing the Forward Path
Verify the forward input level via RF input Test Point, measure the signal level, if it is not
specified in the system design, you must adjust the Input level higher or lower.