ATX QFMN User manual

Installation & Operation Manual
QFMN Fiber Mini Node Distribution Amplier
QFMN

MDU Solutions®is a registered trademark of ATX in the United States and/or other countries. Products or features contained herein may be covered by one or more U.S.
or foreign patents. Kimwipes®and other non-ATX product and company names in this manual are the property of their respective companies.
Although every effort has been taken to ensure the accuracy of this document it may be necessary, without notice, to make amendments or correct omissions.
Specications subject to change without notice.

MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 3
TABLE OF CONTENTS
Page
1. INTRODUCTION..............................................................................................1-1
2. INSTALLATION................................................................................................2-1
3. POWERING......................................................................................................3-1
4. OPTICAL CONNECTORS & CLEANING........................................................4-1
5. OPERATIONAL SET-UP..................................................................................5-1
6. SERVICE & WARRANTY ................................................................................6-1
7.1 Contact ATX Networks ..............................................................................6-1
7.2 Warranty Information.................................................................................6-1

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MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 1-1
CHAPTER 1: INTRODUCTION
INTRODUCTION
1. Introduction
The QFMN device is a cost effective mini indoor ber node.
QFMN provides the user with a two-way 870 MHz node with excellent RF and optical performance. The forward optical
detector will accept either 1310nm or 1550nm wavelengths. The QFMN device is designed to operate with a nominal optical
input level of 0 dBm that provides the best RF performance.
QFMN also provides a factory installed 5 to 42 MHz Fabry-Perot return path transmitter with a built-in gain potentiometerto
set the optimum drive level to the laser driver amp and a factory selected plug-in-pad after the laser driver amp to set the
optimum laser RF drive level.
The QFMN device can provide RF output levels of +45 dBmV. For set-up and monitoring purposes, QFMN provides a -20 dB
Forward RF test point located at the output of the amplier and a -20 dB test point for the return path located after the laser
driver amp. Internally a 10-segment LCD optical power meter is available to aid in proper set-up of the forward path optical
input.

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CHAPTER 1: INTRODUCTION
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MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 2-1
CHAPTER 2: INSTALLATION
INSTALLATION
2. Installation
QFMN is designed as a wall or cabinet mounted device. Four mounting holes are available on the chassis to provide the
installer the ability to secure the QFMN device in the required mounting method. QFMN is specied to operate from 0ºC
to+70ºC (+32ºF to +158ºF). The QFMN device should be mounted in an adequately ventilated area to provide adequate air
ow across the chassis and should not be installed in areas of high humidity. Extremely dusty areas should be avoided as
well to eliminate potential contamination of the optical interfaces.

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CHAPTER 2: INSTALLATION
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MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 3-1
CHAPTER 3: POWERING
POWERING
3. Powering
The QFMN device operates with an external class 2 transformer (ATX model: #951, 120VAC to 26VAC, 60 Hz, 50 VA).
Alternately an external universal power supply (ATX model: EPS 267-ND, 100-240VAC to 24VDC) is available for requirements
other than typical 110VAC installations. AC powering is accomplished by connecting the terminals of the #951transformer (or
alternate EPS 267-ND universal power supply) at the terminal block located on the underside of the QFMN device.

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CHAPTER 3: POWERING
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MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 4-1
CHAPTER 4: OPTICAL CONNECTORS & CLEANING
OPTICAL CONNECTORS & CLEANING
4. Optical Connectors & Cleaning
The QFMN device is available with either SC/APC (green) or SC/UPC (blue) style optical connectors. The optical connector
is located on the rear of the unit. Be sure to only mate the same style connectors. Mating APC with UPC-style connectors can
cause undesirable results. Fiber connectors should never be left uncovered due to the possibility of contamination.
Commercially available ber cleaning products are easily available (such as pre-packaged alcohol wipes, Kimwipes®, etc.) and
should be used to ensure that the ber connections are free of any contaminants.

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CHAPTER 4: OPTICAL CONNECTORS & CLEANING
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MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 5-1
CHAPTER 5: OPERATIONAL SET-UP
OPERATIONAL SET-UP
5. Operational Set-up
After attaching power and securely mounting the QFMN device, connect the forward optical input (labelled FORWARD
OPTICAL INPUT) ensuring that the optical connectors are kept free of contaminants. If applicable, connect the return path
optical connector (labelled RETURN LASER).
If installing a QFMN Node with an integrated WDM for bidirectional communications, only the FORWARD OPTICAL INPUT
connection will be utilized for both forward and return transmission.
Connect the forward RF output (labelled FWD. OUTPUT) using a 75 Ohm F-style connector.
The optical input range of the QFMN device is -4 dBm to +4 dBm. The recommended operating range of the QFMN device
is -2 dBm to +2dBm. Optimum performance of the QFMN device is specied with 1mW (0 dBm) of optical input power to
achieve the stated specications. Optical inputs which are less than -2 dBm or above +2 dBm will result in slightly decreased
RF performance of the QFMN device.
As shown in Figure 1 below, a 10-bar LED located inside the unit provides a quick indication of forward optical input power.
When the LED lights GREEN, you are within the recommended operating range of the node (-2 dBm to +2 dBm) as shown
in the gure below. When the LED lights either YELLOW or RED you are outside of the recommended operating range and
should decrease or increase optical input power as needed until the LED displays GREEN.
After connection of the forward and return optical connections into the QFMN device and verifying the correct optical input
power, RF tilt and gain adjustments can be made to help achieve the required output slope and output RF levels. The locations
for the tilt and gain controls are shown below on the logical schematic labelled Figure 2.
Utilize the -20 dB test point to measure the FWD path gain and slope.
A -20 dB TX test point, located on the side of the unit can be utilized for setting up the return path.
Figure #1: Forward Optical Input LED Bar Graph
q q
q
-2 dBm to +2 dBm

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CHAPTER 5: OPERATIONAL SET-UP
Figure #2: QFMN Functional Schematic
HIGH PASS
LOW PASS
RESPONSE
NETWORK
FORWARD
OPTICAL
INPUT
REVERSE
OPTICAL
OUTPUT
GAIN SLOPE
FORWARD OUTPUT
RETURN INPUT
-20 dB
TEST POINT
-20 dB TX
TEST POINT
GAIN
FACTORY
SELECTED
PLUG-IN
PAD
Figure #4: QFMN Specications

MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 5-3
CHAPTER 5: OPERATIONAL SET-UP
2: Connector Type: A = SC/APC
F = SC/UPC
4: Technology: no letter = Silicon Push-Pull
G = GaAs Push-Pull
5: Amplifier Configuration: 2W = 2-way
Description
120 to 26 VAC, 60 Hz AC Power Transformer, 50 VA Rating
Options & Spares
Example Part Number: QFMN870 A -45 G 2W
1: Frequency Range: 870 = 870 MHz
3: Ouput Level (See Specifications Table)
Part Number
#951
1
2
3
4
5
Figure #5: QFMN Ordering Information
#951 Transformer

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CHAPTER 5: OPERATIONAL SET-UP
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MDU Solutions® – QFMN Fiber Mini Node Distribution Amplier – Installation & Operation Manual 6-1
CHAPTER 6: SERVICE & SUPPORT
SERVICE & SUPPORT
6. Service & Support
6.1 Contact ATX Networks
Please contact ATX Technical Support for assistance with any ATX products. Please contact ATX Customer Service to obtain
a valid RMA number for any ATX products that require service and are in or out-of-warranty before returning a failed module
to the factory.
TECHNICAL SUPPORT
Tel: [phone]
Toll Free: [phone] (USA & Canada only)
► Press *3 for Technical Support
► Then press 1 for Digital Video Products (DVIS, DigiVu, UCrypt, etc.)
► OR, press 2 for All Other Products
Email: [email protected] for Digital Video Products
Email: [email protected] for All Other Products
CUSTOMER SERVICE
ATX Networks
1-501 Clements Road West
Ajax, ON L1S 7H4 Canada
Tel: [phone]
Toll Free: [phone] (USA & Canada only)
► Press *1 for Customer Service
Fax: [phone]
Toll Free Fax: [phone] (USA & Canada only)
Web: www.atxnetworks.com
Email: [email protected]
6.2 Warranty Information
All of ATX Networks’ products have a 1-year warranty that covers manufacturer’s defects or failures.

Printed in Canada Rev. 07/15 (ANW1120)
1-501 Clements Road West, Ajax, ON L1S 7H4 Canada
Tel [phone] Toll Free [phone]
Fax [phone] Toll Free Fax [phone]
www.atxnetworks.com [email protected]