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Ascent Communication Technology AT5226 DMOD Series User manual

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AT5000
2.6GHz DMOD
Optical
Transmitter
Quick Reference
Guide
Revision D
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 2 of 27
ACT AT5226 Direct Modulation Optical Transmitter
Quick Reference Guide
ACT Document Number: ACT AT5226 Direct Modulation Optical Transmitter
Copyright © 2019 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: support@ascentcomtec.com
Revision History
Revision
Date
Reason for Change
A
04/12/2016
Initial release
B
04/04/2017
Updated specifications
C
04/11/2017
Added WEB manager
D
02/17/2019
Updated formatting
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 3 of 27
Table of Contents
1 Precautions ............................................................................................................................ 5
2 Introduction ........................................................................................................................... 6
2.1 Overview ························································································································ 6
2.2 Features·························································································································· 7
2.3 Specifications ················································································································· 8
2.4 Models and Options······································································································· 9
3 Installation............................................................................................................................ 10
3.1 Equipment Inventory ··································································································· 10
3.2 Packaging and Transportation······················································································ 10
3.3 Power and Cooling Requirements················································································ 10
3.4 Installation and Adjustment························································································· 11
3.5 Front Panel Operation·································································································· 12
3.6 Rear Panel Operation··································································································· 13
4 Technical Description ........................................................................................................... 13
4.1 Overview ······················································································································ 13
4.2 Physical Description ····································································································· 14
4.3 AGC Operation ············································································································· 14
4.4 ITU Frequency Grid ······································································································ 14
5 Software Description – Operation ....................................................................................... 16
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 4 of 27
5.1 Web Management ······································································································· 16
5.2 Device Status Submenu ······························································································· 19
5.3 Device Settings Submenu····························································································· 20
5.4 Alarm Status················································································································· 20
5.5 Alarm Properties·········································································································· 21
5.6 Network Settings:········································································································· 21
5.7 Change Password ········································································································· 22
5.8 Reset Settings··············································································································· 22
6 Setup Menu.......................................................................................................................... 23
7 Troubleshooting ................................................................................................................... 26
7.1 Fiber Optic Maintenance ····························································································· 26
7.2 Troubleshooting Conditions························································································· 26
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 5 of 27
Warning
Exposure to class 1M laser radiation is possible. Access should be restricted to trained
personnel only. Do not view exposed fiber or connector ends when handling optical
equipment.

Ensure adequate cooling and ventilation as specified.

The installation and operation manual should be read and understood before units are
put into use.

Always replace protective caps on optical connectors when not in use.

The typical connectors fitted are SC/APC 8°. Note: 8° angle polished connectors must be
used.
Cleaning
Use only a damp cloth for cleaning the front panel. Use a soft dry cloth to clean the top of the
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 only to Ascent Communication Technology qualified service
personnel.
Servicing
Do not attempt to service this unit yourself. Refer all servicing only to Ascent Communication
Technology qualified service personnel.
General Reminders and Warnings
Review these reminders and warnings before you inspect and clean your fiber-optic
connections.
Reminders

Always turn off any laser sources before you inspect fiber connectors, optical
components, or bulkheads.

Always make sure that the cable is disconnected at both ends and that the card or
pluggable receiver is removed from the chassis.

Always wear the appropriate safety glasses when required in your area. Be sure that
any laser safety glasses meet federal and state regulations and are matched to the
lasers used within your environment.

Always inspect the connectors or adapters before you clean.

Always inspect and clean the connectors before you make a connection.

Always use the connector housing to plug or unplug a fiber.
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 6 of 27

Always keep a protective cap on unplugged fiber connectors.

Always store unused protective caps in a resealable container in order to prevent the
possibility of the transfer of dust to the fiber. Locate the containers near the connectors
for easy access.

Always discard used tissues and swabs properly.
Warnings

Never use alcohol or wet cleaning without a way to ensure that it does not leave residue
on the endface. It can cause damage to the equipment.

Never look into a fiber while the system lasers are on.

Never clean bulkheads or receptacle devices without a way to inspect them.

Never touch products without being properly grounded.

Never use unfiltered handheld magnifiers or focusing optics to inspect fiber connectors.

Never connect a fiber to a fiberscope while the system lasers are on.

Never touch the end face of the fiber connectors.

Never twist or pull forcefully on the fiber cable.

Never reuse any tissue, swab, or cleaning cassette reel.

Never touch the clean area of a tissue, swab, or cleaning fabric.

Never touch any portion of a tissue or swab where alcohol was applied.

Never touch the dispensing tip of an alcohol bottle.

Never use alcohol around an open flame or spark; alcohol is very flammable.
ACT AT5226 1RU 2.6GHz 1550nm Direct-Modulated (DMOD) Laser Transmitter offers a flexible
and scalable optical transmission for high quality CATV & SAT-IF video in short, medium
distance FTTH networks. It was designed with high linearity and low chirp DFB laser, with
built-in pre-distortion compensation and AGC close loop control for improved performance.
AT5226 DMOD series transmitters are capable of delivering analog and digital video
transmission up to 15km, all Digital loading up to 45km, with intuitive front panel LCD display
to make operator’s daily operation easier. The optical transmitter is packaged in a self-
contained 19” sub-rack of 1 RU with universal mains power supply and SNMP management.
The optical output power level can be ordered at either 6 dBm, 8dBm or 10dBm with single or
dual power supply for redundancy. Combined with ACT AT5200 Multiport EDFA optical
amplifier, AT5226 DMOD transmitter provides the most cost effective solution for short,
medium IPTV, VOD and traditional CATV & SAT-IF services in HFC & FTTX networks.
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 7 of 27

Suitable for short, medium distance FTTH applications with CATV & SAT-IF overlay

Wide band: 45 to 862MHz & 950 to 2600MHz

Optimized models for analog and digital signal up to 15km

High linearity and low chirp DFB laser

Built-in pre-distortion compensation and AGC closed loop control,

Dual redundant hot-swappable AC or DC power supplies

High reliability with laser APC control circuit

Front-panel LCD for local monitoring of transmitter status

Local or remote monitoring and configuration

SNMP/HTTP monitoring, management and control
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 8 of 27
AT5226 DMOD 1550 nm 2.6 GHz Direct-Modulated (DMOD) Laser Transmitter - 19” 1RU
Items
Min
Typical
Max
Unit
Remarks
Optical Parameters
Working Wavelength
1540
1550
1563
nm
1300
1310
1320
nm
Optional
Output Power
4
10
mW
1550 nm
8
30
mW
1310 nm
Optical Isolation
30
dB
Optical Return Loss
50
dB
Fiber Connector
FC/APC, SC/APC
Chosen by customer
CATV RF Parameters
Bandwidth
47
862
MHz
Input Range
75
85
dBµV
Flatness
-0.75
+0.75
dB
47 MHz to 862 MHz
C/N
51
dB
Test standard GT/T 184-2002
C/CTB
63
dB
Test standard GT/T 184-2002
C/CSO
58
dB
Test standard GT/T 184-2002
Input Return Loss
16
dB
RF Port
F-
Imperial
Input Impedance
75
Ω
SAT-IF Parameters
Working Bandwidth
5
2600
MHz
Input Range
-25
-5
dBm
Flatness
-1
+1
dB
950 MHz to 2600 MHz
Input Return Loss
10
dB
RF Port
Imperial
Input Impedance
75
Ω
Tuner Feeding Voltage
0/13/18
V
Tuner Feeding Current
300
mA
General Parameters
Power Supply
A: 160VAC - 250 VAC (50 Hz)
B: 48 VDC
V
Power Consumption
30
W
Working Temp
0
50
°C
Max Working Humidity
5
95
%
Storage Temp Range
-40
60
°C
Dimensions
483 × 395 × 44
mm
1U 19”
Net Weight
5
kg
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 9 of 27
AT5226 DMOD Series
Description
AT-5226-DMOD-00-06-M-SC-AC
AT5226 DMOD TX 1RU 1550+/-10nm, 6dBm output, 2600MHz, analog
channels up to 10km , SC/APC, Single AC Power
AT-5226-DMOD-00-08-M-SC-AC
AT5226 DMOD TX 1RU 1550+/-10nm, 8dBm output, 2600MHz, analog
channels up to 10km , SC/APC, Single AC Power
AT-5226-DMOD-00-10-M-SC-AC
AT5226 DMOD TX 1RU 1550+/-10nm, 10dBm output, 2600MHz,
analog channels up to 10km , SC/APC, Single AC Power
AT-5226-DMOD-21-08-M-SC-AC
AT5226 DMOD TX 1RU ITU Ch 21, 8dBm output, 2600MHz, analog
channels up to 10km , SC/APC, Single AC Power
AT-5226-DMOD-21-10-M-SC-AC
AT5226 DMOD TX 1RU ITU Ch 21, 10dBm output, 2600MHz, analog
channels up to 10km , SC/APC, Single AC Power
Note
Contact ACT for additional product variations on output power, 1 GHz, specific ITU
channels, optical connectors etc.
AT5000 2.6GHz DMOD Optical Transmitter
Solutions Provider for FTTx, RFoG and HFC www. ascentcomtec.com
Page 10 of 27
On receiving your new AT5226-DMOD, 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 AT5226-DMOD should consist of the following:
Qty
Description
1
AT5226-DMOD2 Unit
1
1
Key for switching laser ON / OFF
Test Report
1
Power supply cord
1
Optional Product User Manual ( Optional)
Keep all AT5226-DMOD packing boxes and packaging for future transport.
Use only the original AT5226-DMOD packaging when transporting. This packaging has been
specifically designed to protect the equipment.
The AT5226-DMOD requires a mains input of 90 VAC to 265 VAC at 50 to 60 Hz. The unit will
automatically adjust the power conversion for inputs within these ranges, with no switch
setting or other user intervention. Power consumption of the unit is 50 watts maximum.
The transmitter is designed to operate with an ambient temperature of 0 °C to 50 °C with
humidity up to 95 %. Free ambient air should be maintained around all sides of the unit. Care
should be taken to ensure that the air flow around the unit is unrestricted.
The AT5226-DMOD should have a minimum ventilation clearance of 1 RU above and below
the transmitter.
Warning
DO NOT expose AT5226-DMOD to conditions which would permit condensation to form
on the inside of the transmitter.
DO NOT operate AT5226-DMOD outdoors.