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AOI Quantum12 Installation And Operation Manual

1.2ghz system amplifier
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Quantum12 1.2GHz System Amplifier
INSTALLATION AND OPERATION GUIDE
13139 Jess Pirtle Boulevard, Sugar Land, TX 77478 | T: 281.295.1800

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  • Page 1 Quantum12 1.2GHz System Amplifier INSTALLATION AND OPERATION GUIDE 13139 Jess Pirtle Boulevard, Sugar Land, TX 77478 | T: 281.295.1800...

  • Page 2: For Your Safety

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide For Your Safety...
  • Page 3 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide EXPLANATION OF WARNING AND CAUTION ICONS Avoid personal injury and product damage! Do not proceed beyond any symbol until you fully understand the indicated conditions. The following warning and caution icons alert you to important information about the safe operation of...

  • Page 4: Notices

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Notices...
  • Page 5 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TRADEMARK ACKNOWLEDGMENTS  AOI, the AOI logo, Applied Optoelectronics, the AOI logo, and Quantum Bandwidth are trademarks or registered trademarks of Applied Optoelectronics, Inc. and / or its affiliates in the U.S. and certain other countries.

  • Page 6: Table Of Contents

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Table of Contents FOR YOUR SAFETY ....................2 NOTICES ........................4 IMPORTANT SAFETY INSTRUCTIONS ..............10 INTRODUCTION .................... 18 Description ............................. 20 Components ................................20 Quantum12 Amplifier Characteristics ........................20 Power Supply ................................21 Input and Output Ports .............................
  • Page 7 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide To Install the New Housing Seizures ........................31 Upgrading an Existing Housing Lid ....................32 To Install the New Housing Lid ..........................32 Installing the Power Supply ......................34 To Install the Power Supply Module ......................... 34 To Set the AC Undervoltage Lockout Selector ......................
  • Page 8 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide To Select the Forward Path Balancing Procedure ....................63 Forward Path Balancing for AGC Stations Using Manual Setup Mode ..............63 Forward Path Balancing for AGC Stations Using Thermal Setup Mode ..............70 Forward Path Balancing for Thermal Stations Using Amplifier Only Compensation Mode ........
  • Page 9 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 1 GHz Forward Cable Equalizer Loss Chart ......................107 870 MHz Forward Cable Equalizer Loss Chart ....................... 108 Reverse Cable Equalizer Charts ....................109 42 MHz and 40 MHz Reverse Cable Equalizer Loss Chart ..................109 42 MHz and 40 MHz Thermal Reverse Cable Equalizer Loss at 25°C Ambient ............

  • Page 10: Important Safety Instructions

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Important Safety Instructions...
  • Page 11 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide READ AND RETAIN INSTRUCTIONS Carefully read all safety and operating instructions before operating this equipment, and retain them for future reference. FOLLOW INSTRUCTIONS AND HEED WARNINGS Follow all operating and use instructions. Pay attention to all warnings and cautions in the operating instructions, as well as those that are affixed to this equipment.
  • Page 12 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide EQUIPMENT PLACEMENT WARNING: Avoid personal injury and damage to this equipment. An unstable mounting surface may cause this equipment to fall. To protect against equipment damage or injury to personnel, comply with the following: ...
  • Page 13 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide  This equipment may have two power sources. Be sure to disconnect all power sources before working on this equipment.  If this equipment does not have a main power switch, the power cord connector serves as the disconnect device.
  • Page 14 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Grounding Terminal If this equipment is equipped with an external grounding terminal, attach one end of an 18-gauge wire (or larger) to the grounding terminal; then, attach the other end of the wire to a ground, such as a grounded equipment rack.
  • Page 15 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Be aware of the following general precautions and guidelines: 1. SERVICING Servicing is required when this equipment has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into this equipment, this equipment has been exposed to rain or moisture, does not operate normally, or has been dropped.
  • Page 16 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide FUSE REPLACEMENT To replace a fuse, comply with the following:  Disconnect the power before changing fuses.  Identify and clear the condition that caused the original fuse failure.  Always use a fuse of the correct type and rating. The correct type and rating are indicated on this equipment.
  • Page 17 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Modifications have the potential to degrade the level of protection built into this equipment, putting people and property at risk of injury or damage. Those persons making any modifications expose themselves to the penalties arising from proven non-compliance with regulatory requirements and to civil litigation for compensation in respect of consequential damages or injury.

  • Page 18: Introduction

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Introduction In this Chapter… DESCRIPTION ......................20 ILLUSTRATIONS ...................... 23 BLOCK DIAGRAMS ....................25 Document Version This is the first release of this guide.
  • Page 19 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide OVERVIEW The Quantum12 Broadband Amplifier Platform includes a variety of RF amplifiers that address the divergent needs of today's broadband networks. All Quantum12 amplifiers provide superior two-way performance and reliability combined with a user-friendly layout.

  • Page 20: Description

    204/258 MHz Components All Quantum12 1.2GHz amplifiers are composed of two sections: a base and a lid. The lid houses the power supply, optical interface board, fiber management tray, two optical receivers, and one optical transmitter. The lid section is interchangeable among Quantum12 1.2GHz amplifiers. See the appropriate product documentation for more information.

  • Page 21: Power Supply

    ▪ moving a jumper). Input and Output Ports Input and output ports for the Quantum12 1.2GHz System Amplifier are configured for each amplifier type as follows: HIGH GAIN DUAL These amplifiers have one input port and two or three output ports. The number of output ports is determined by the component installed in the plug-in signal director position: ...

  • Page 22: Configuration

    (pads, EQs, Signal Directors, etc.) or a spare items (power supplies, surge protectors, etc.). Please refer to the Quantum12 1.2GHz Amplifier Data Sheet for a full listing of the Configured Amplifier Stations, RF modules, and accessories that are available.

  • Page 23: Illustrations

    The following diagram shows the High Gain Dual Amplifier module test points: NOTE: ▪ The test point locations are the same for all Quantum12 1.2GHz System Amplifiers. ▪ Test points shown are -20 dB except for AC and DC test points.

  • Page 24: High Gain Balanced Triple Accessories

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide High Gain Balanced Triple Accessories The following diagram shows the accessory locations for the High Gain Balanced Triple Amplifier module:...

  • Page 25: Block Diagrams

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Block Diagrams High Gain Dual The following illustration is a block diagram of the High Gain Dual Amplifier module: High Gain Balanced Triple The following illustration is a block diagram of the High Gain Balanced Triple Amplifier module:...

  • Page 26: Installation And Configuration

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Installation and Configuration In this Chapter… BEFORE YOU BEGIN ....................28 OPENING THE AMPLIFIER HOUSING ..............30 UPGRADING EXISTING HOUSING SEIZURES ............31 UPGRADING AN EXISTING HOUSING LID ............... 32 INSTALLING THE POWER SUPPLY ................. 34 ATTACHING THE COAXIAL CONNECTORS .............
  • Page 27 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide INTRODUCTION This chapter provides instructions for installing and configuring the Quantum12 1.2GHz System Amplifier in your cable system.

  • Page 28: Before You Begin

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Before You Begin The procedures in this chapter assume that you have completed the following:  Prepared the installation site.  Located the coaxial cable, with or without the pin-type coaxial connectors mounted on the cable.

  • Page 29: Amplifier Module Cover

    Normal field maintenance will not require the removal of this cover. Module and Housing Compatibility HOUSING LID The Quantum12 1.2GHz System Amplifier module is compatible with the Quantum12 housing lid only. The amplifier will not work with System Amplifier II, II+, or III housing lids. HOUSING BASE The Quantum12 1.2GHz System Amplifier module is...

  • Page 30: Opening The Amplifier Housing

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Opening the Amplifier Housing To Open the Amplifier Housing Complete the following steps to open the amplifier housing: IMPORTANT: Before unscrewing the housing bolts, make sure the removable locking screw in the hinge is in place and secure.

  • Page 31: Upgrading Existing Housing Seizures

    The Quantum12 System Amplifier modules have a higher current-carrying capacity than some earlier amplifier module products. If you are replacing an earlier amplifier module (SA II, SA II+, or SA III) with a Quantum12 System Amplifier module, you will need to upgrade the housing base to handle the higher current demands.

  • Page 32: Upgrading An Existing Housing Lid

    The Quantum12 System Amplifier has a new style housing lid that allows easier access to the amplifier power supply. If you are replacing an earlier amplifier module (SA II, SA II+, or SA III) with a Quantum12 amplifier, you will have to replace the existing housing lid with a newer housing lid to accommodate the power supply for the amplifier module.
  • Page 33 It is possible for the housing lid to separate from the housing base and fall, possibly causing injury or damage to persons or property below. 4. Firmly grasp the new Quantum12 housing lid and place it onto the housing bottom, swiveling it into place on the housing hinge. WARNING:...

  • Page 34: Installing The Power Supply

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Installing the Power Supply IMPORTANT: The AC shunt power directors must be removed before installing the unit. Removal of the AC shunt power directors reduces the power surge to the components and F-connectors.

  • Page 35: To Set The Ac Undervoltage Lockout Selector

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 3. Tighten the four module screws on the power supply module to 2 ft-lb to 5 ft-lb (2.7 Nm to 6.8 Nm). 4. Attach the 10-pin keyed connector of the power cable and harness to the power supply module.
  • Page 36 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Complete the following steps to set the AC undervoltage lockout selector: 1. Locate the AC undervoltage lockout selector on the power supply in the housing lid. 2. Set the AC undervoltage lockout selector for your powering application as illustrated in the following diagram.

  • Page 37: Attaching The Coaxial Connectors

    Attaching the Coaxial Connectors To Trim the Center Conductor The Quantum12 1.2GHz Amplifier requires pin-type connectors for all RF connections. Standard pin connectors, with pins extending 1.5 in. to 1.6 in. (3.8 cm to 4.1 cm) from the connector shoulder, require no trimming. You must trim longer pins before inserting them into the housing.
  • Page 38 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 6. Check for the presence of RF at an unused port: ▪ If RF is present, insert a 75 Ohm housing terminator into the port and tighten per manufacturer instructions; ▪...

  • Page 39: Installing The Housing

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Installing the Housing The following procedures detail how to install the Quantum12 1.2GHz System Amplifier housing on a strand (aerial) or in a pedestal. To Install the Housing on a Strand (Aerial) Complete the following steps to install the housing on a strand (aerial).

  • Page 40: To Install The Housing In A Pedestal

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide SIGNAL FLOW FROM RIGHT TO LEFT NOTE: Coax In may be switched with the Coax Out if you reverse the line extender module and feed the signal from right to left.

  • Page 41: Installing Accessories

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Installing Accessories The following section provides instructions for installing accessories into the Quantum12 1.2GHz System Amplifier. To Install Attenuator Pads Complete the following steps to install the attenuator pads in the amplifier: NOTE: For best results, follow this installation procedure exactly.

  • Page 42: To Install Equalizers

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide To Install Equalizers Complete the following steps to install the equalizers in the amplifier: NOTE: For best results, follow this installation procedure exactly. 1. Begin this procedure with the housing open. Refer to “To Open the Amplifier Housing” (on page 30).

  • Page 43: To Replace The Crowbar Surge Protector

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide To Replace the Crowbar Surge Protector NOTE: The crowbar surge protector is installed in factory. This procedure is to replace it onsite. Complete the following steps to install the crowbar surge protector in the amplifier: 1.

  • Page 44: To Replace The Diplexer

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 6. Install other options or accessories as desired, or proceed to “Installing the Amplifier Module” (on page 48). To Replace the Diplexer Complete the following steps to install the diplexer in the amplifier: 1.

  • Page 45: To Replace The Low Pass Filter Trim (Lpft)

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide To Replace the Low Pass Filter Trim (LPFT) Complete the following steps to install the low pass filter trim in the amplifier: 1. Begin this procedure with the housing open. Refer to “To Open the Amplifier Housing” (on page 30).

  • Page 46: To Install The Plug-In Signal Director (High Gain Dual Only)

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide To Install the Plug-in Signal Director (High Gain Dual Only) Complete the following steps to install the signal director in the amplifier: 1. Begin this procedure with the housing open. Refer to “To Open the Amplifier Housing” (on page 30).
  • Page 47 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide SPLITTER To activate the… Orient the splitter… Aux 1 Port and Aux 2 Port… so that the word "AUX 1" on the jumper label is next to the word "AUX 1" on the amplifier module cover, and so that the word "AUX 2"...

  • Page 48: Installing The Amplifier Module

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Installing the Amplifier Module The amplifier module plugs into the strand-mounted or pedestal-mounted (bottom) of the housing via RF connectors on the bottom side of the module. Amplifier housings and amplifier modules are designed so that you can orient the amplifier module conveniently for maintenance.
  • Page 49 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 4. Secure the amplifier module to the housing by tightening the four-system amplifier module retainer screws. Tighten slotted head screws to 6 in-lb to 9 in-lb (0.7 Nm to 1.0 Nm), or cross head screws to 18 in-lb to 20 in-lb (2.0 Nm to 2.25 Nm).
  • Page 50 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide NOTE: ▪ Depending on the orientation of the amplifier module in the housing, your power harness routing should resemble either the previous or the next illustration. Use the routing method best suited for your installation.

  • Page 51: Removing The Amplifier Module From The Housing

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Removing the Amplifier Module from the Housing To Remove the Amplifier Module Complete the following steps to remove the line extender module: 1. Open the housing. Refer to “To Open the Amplifier Housing” (on page 30).
  • Page 52 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 6. Using a flat-blade screwdriver, loosen the four module retainer screws. 7. Remove the amplifier module from its housing and place the amplifier module on a secure surface. CAUTION: Avoid personal injury and damage to the amplifier module. Make...

  • Page 53: Removing And Installing Ac Shunt Power Directors

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Removing and Installing AC Shunt Power Directors The amplifiers draw AC power from the coaxial cable. This AC power comes from an external AC power supply. WARNING: When AC is applied from RF ports to units downstream, the downstream equipment shall also be located in a restricted access location (access restricted to service personnel).
  • Page 54 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 3. To install a power director, refer to the systems design print to determine AC power routing and install the AC shunt power directors in the required locations. 4. Close the housing. Refer to “To Close the Amplifier Housing” (on page 55).

  • Page 55: Closing The Amplifier Housing

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Closing the Amplifier Housing To Close the Amplifier Housing Complete the following steps to close the amplifier housing: CAUTION: Avoid moisture damage and RF leakage! Follow the procedure exactly as shown below to ensure a proper seal.

  • Page 56: Balancing And Setup

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Balancing and Setup In this Chapter… PREPARING FOR FORWARD PATH BALANCING ............. 58 BALANCING THE FORWARD PATH ................. 63 BALANCING THE REVERSE PATH ................83...
  • Page 57 INTRODUCTION This chapter provides instructions for selecting and implementing the correct balancing methods for the Quantum12 1.2GHz System Amplifier in your cable system. Balancing sets the operating levels of the station to ensure proper performance. IMPORTANT: Use the information in this chapter to identify the equipment needed for balancing and to...

  • Page 58: Preparing For Forward Path Balancing

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Preparing for Forward Path Balancing Before you begin balancing, it is important to review and understand the following information. This information will show you which balancing process is appropriate for your amplifier.
  • Page 59 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 3. POSITION 3 Selects AGC operational mode. NOTE: AGC operational mode is used only after the station has been initially balanced in either thermal or manual setup mode. BODE NETWORK The BODE Network, or BODE, is an interstage variable attenuation and slope network whose loss characteristics are driven by DC control voltage.
  • Page 60 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Switch S1 Positions for Thermal Stations The mode of thermal compensation you select for a thermal station determines the position in which you place switch S1: 1. POSITION 1 Selects amplifier only compensation mode.

  • Page 61: To Verify The Input Signal Level

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Switch S1 Position Information for Thermal Configured Stations Position 1 Position 2 Position 3 Amplifier Only NOT USED Amplifier and Coax A thermistor (thermal) driven circuit on IMPORTANT: Do not select this position.
  • Page 62 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 3. Compare the measured levels to the design input levels on the system design print. NOTE: Add 20 dB to the measured levels to find the true levels. The test point attenuates input signals by 20 dB.

  • Page 63: Balancing The Forward Path

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Balancing the Forward Path Be sure to use the correct procedure for forward path balancing. Refer to “To Select the Forward Path Balancing Procedure” for help in identifying the procedure that best fits your system installation and amplifier type.
  • Page 64 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 2. Set switch S1 to Position 2. 3. Turn the MANUAL BACKOFF potentiometer fully counterclockwise for maximum gain. 4. Determine the outside temperature at the amplifier location. 5. Refer to the “Manual Backoff Chart” (on page 65) to find the proper manual backoff level for the current temperature and reference frequency.
  • Page 65 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Manual Backoff Chart The following table displays the manual backoff level for selected frequencies and various temperatures. 445.25 MHz 547.25 MHz 870 MHz 1 GHz Backoff 1218 MHz Backoff Level Backoff Level...
  • Page 66 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TO DETERMINE THE OUTPUT TILT Complete the following steps to determine the output tilt of the amplifier: 1. Connect the test point adapter to the forward main output test point. 2. Consult the design print to find the proper output tilt.
  • Page 67 5. Proceed to the next section “To Set Up Automatic Gain Control.” TO SET UP AUTOMATIC GAIN CONTROL This section provides procedures and tables for configuring and aligning the AGC in the Quantum12 1.2GHz System Amplifier. AGC attenuator values are required to select the proper AGC attenuator value based upon actual AGC pilot carrier output level.
  • Page 68 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide The following diagram shows the location of the AGC related switch, controls, and AGC pad. TO SELECT THE AGC PAD VALUE 1. Use the following formulas to determine the correct AGC pad value:...
  • Page 69 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TO ALIGN THE AGC MODULE Complete the following steps to align the AGC module: 1. Make sure that switch S1 is set to Position 2. 2. Insert the test probe into the -20 dB forward main output test point on the amplifier.

  • Page 70: Forward Path Balancing For Agc Stations Using Thermal Setup Mode

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 4. Set switch S1 to Position 3 for AGC operation. 5. Adjust the AGC gain control potentiometer to match the level you measured in Step 3. 6. Move switch S1 back and forth between Position 2 and Position 3.
  • Page 71 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TO SET SWITCH S1 FOR THERMAL SETUP MODE You must set switch S1 to Position 1 to use thermal setup mode. TO DETERMINE THE OUTPUT TILT Complete the following steps to determine the output tilt of the amplifier: 1.
  • Page 72 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TO SET THE OUTPUT TILT Equalizers (EQs) are available in 1.5 dB (equivalent) increments. A 1.5 dB change in value changes the difference between low and high frequencies by approximately 1 dB.
  • Page 73 5. Proceed to the next section “To Set Up Automatic Gain Control.” TO SET UP AUTOMATIC GAIN CONTROL This section provides procedures and tables for configuring and aligning the AGC in the Quantum12 1.2GHz System Amplifier. AGC attenuator values are required to select the proper AGC attenuator value based upon actual AGC pilot carrier output level.
  • Page 74 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TO SELECT THE AGC PAD VALUE 1. Use the following formulas to determine the correct AGC pad value: High Gain Dual and AGC Pad Value = RF output level at pilot frequency...
  • Page 75 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 3. Measure and note the RF output level at the AGC pilot frequency. NOTE: Remember to add 20 dB to compensate for the test point loss. 4. Set switch S1 to Position 3 for AGC operation.

  • Page 76: Forward Path Balancing For Thermal Stations Using Amplifier Only Compensation Mode

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Forward Path Balancing for Thermal Stations Using Amplifier Only Compensation Mode Before you begin, make sure that you have configured the amplifier module according to the specifications in the design print, and that the amplifier has warmed up for approximately one hour.
  • Page 77 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 4. To determine the actual output tilt, calculate the difference (in dB) between the levels of the lowest and highest specified frequencies. 5. Proceed to the next section “To Set the Output Tilt.”...

  • Page 78: Forward Path Balancing For Thermal Stations Using Amplifier And Coax Compensation Mode

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 4. Repeat Steps 2 and 3 until the output level is correct. NOTE: On the High Gain Dual, the type of plug-in signal director installed directly affects the signal level measured at the Aux RF output test points. This is because the Aux RF output test points are located after the signal director in the forward RF signal path.
  • Page 79 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TO DETERMINE THE OUTPUT TILT Complete the following steps to determine the output tilt of the amplifier: 1. Connect the test point adapter to the forward main output test point. 2. Consult the design print to find the proper output tilt.
  • Page 80 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide TO SET THE OUTPUT LEVEL After setting the tilt, complete the following steps to select the proper pad values for the amplifier. The output level of the amplifier is set by selecting the proper pad value.

  • Page 81: Forward Path Balancing Using Trim Networks

    Type and use factor are determined by evaluating actual system frequency response. Refer to the frequency response plots in System Amplifier and Line Extender including Quantum12 Products Trim Networks Installation Instructions, Part #741338. TO INSTALL A TRIM NETWORK Complete the following steps to install a trim network.
  • Page 82 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 4. Remove the jumper from the system trim location. 5. Install the trim network into the system trim slot. NOTE: ▪ Be sure that all pins on the system trim bottom align with the pin holes in the system trim slot, so the system trim installs flat against the amplifier module.

  • Page 83: Balancing The Reverse Path

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Balancing the Reverse Path This section covers reverse RF amplifier cascade balancing. Balancing refers to the process of individually aligning reverse amplifier station gain and tilt characteristics to achieve reverse amplifier cascades that have optimum, repeatable transmission characteristics.

  • Page 84: To Prepare The Amplifier For Reverse Path Balancing

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide  Reverse sweep receiver (when using a reverse sweep transmitter for test signal). COMMUNICATING TEST RESULTS The variance in relative amplitude and tilt of the received signal from desired (reference) may be relayed to the field technician via the following: ...

  • Page 85: To Calculate The Proper Rf Signal Level

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 2. Ensure that the design value reverse output equalizer and reverse pads are installed in the appropriate reverse slots in the amplifier. Refer to the following diagram. NOTE: Record the pad values for each input port for later use.
  • Page 86 ▪ In the Quantum12 1.2GHz System Amplifier, the reverse input comes after the reverse injection point in the reverse path. Temporarily replacing the design value reverse input pad on the port being balanced with a 0 dB pad allows the reverse injection level and the receive levels at the monitoring end to remain constant from amplifier to amplifier and from port to port.

  • Page 87: To Complete Reverse Path Balancing

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Insert the appropriate signal amplitude into the reverse injection point. Refer to the following illustration. Proceed to “To Complete Reverse Path Balancing” (on page 73). To Complete Reverse Path Balancing Complete the following steps to finish the amplifier setup: 1.
  • Page 88 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 3. Once the proper receive level and tilt of the test signals have been achieved, properly close the amplifier housing and repeat the process at the next reverse amplifier in the downstream cascade.

  • Page 89: Troubleshooting

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Troubleshooting In this Chapter… EQUIPMENT ......................91 NO AC POWER ......................92 NO DC POWER ......................94 NO FORWARD RF SIGNAL ..................95 LOW OR DEGRADED FORWARD RF SIGNAL ............96 NO REVERSE RF SIGNAL ..................
  • Page 90 The housing design has the flexibility to accept a variety of modules.  The modules contain few user serviceable parts. This provides ease of troubleshooting and minimal downtime during repairs. This chapter describes the steps you may take to troubleshoot the Quantum12 1.2GHz System Amplifier.

  • Page 91: Equipment

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Equipment The following equipment may be necessary to perform some troubleshooting procedures:  CLETOP or OPTIPOP ferrule cleaner (CLETOP Type A for SC, Type B for LC).  Compressed air (also called “canned air”).

  • Page 92: No Ac Power

    AC power can be measured at the amplifier seizure screws, AC shunt power directors, amplifier module test points, power supply harness, and AC test points. The following diagram illustrates the AC test point locations for the Quantum12 1.2GHz System Amplifier.
  • Page 93 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Possible Cause Solution AC at the AC Shunt Power Director But Not at the Check and / or replace the AC shunt power  Amplifier Test Point director. Check and / or replace the amplifier module.

  • Page 94: No Dc Power

    DC power can be measured at the amplifier module test points, DC power supply test points, and power wiring harness. The following diagram illustrates the DC test point locations for the Quantum12 1.2GHz System Amplifier. No DC Power Troubleshooting Table...

  • Page 95: No Forward Rf Signal

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide No Forward RF Signal The forward RF signal can be measured at the amplifier module forward input and at the Main, Aux 1, and Aux 2 forward output test points. No Forward RF Signal Troubleshooting Table Before you begin troubleshooting for no forward RF signal, verify that the amplifier is receiving the proper forward RF input signal from the upstream amplifier.

  • Page 96: Low Or Degraded Forward Rf Signal

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Low or Degraded Forward RF Signal The forward RF signal can be measured at the amplifier module forward input and at the Main, Aux 1, and Aux 2 forward output test points.

  • Page 97: No Reverse Rf Signal

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide No Reverse RF Signal The reverse RF signal can be measured at the amplifier module Main, Aux 1, and Aux 2 reverse input and reverse output test points. No Reverse RF Signal Troubleshooting Table...

  • Page 98: Low Or Degraded Reverse Rf Signal

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Low or Degraded Reverse RF Signal The reverse RF signal can be measured at the amplifier module Main, Aux 1, and Aux 2 reverse input and reverse output test points. Low or Degraded Reverse RF Signal Troubleshooting Table...
  • Page 99 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Possible Cause Solution Reverse RF Signal Still Low or Degraded Verify that any unused RF ports are properly  terminated. Use a spectrum analyzer to look at the reverse  RF input signal spectral quality at each reverse input test point and compare it to the reverse RF output signal spectral quality.

  • Page 100: Customer Support Information

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Customer Support Information...
  • Page 101 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide IF YOU HAVE QUESTIONS If you have technical questions, call AOI Services for assistance. Follow the menu options to speak with a service engineer. Access your company's extranet site to view or order additional technical publications. For accessing instructions, contact the representative who handles your account.

  • Page 102: Appendix A: Technical Information

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide APPENDIX A: Technical Information In this Appendix… “LINEAR” TILT CHARTS ..................104 FORWARD CABLE EQUALIZER CHARTS ............... 106 REVERSE CABLE EQUALIZER CHARTS ..............109 INVERSE CABLE EQUALIZER CHARTS ..............111...
  • Page 103 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide INTRODUCTION This appendix contains tilt, forward and reverse equalizer charts and pad values and part numbers.

  • Page 104: Linear" Tilt Charts

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide “Linear” Tilt Charts Amplifier Output “Linear” Tilt Chart for 1.2 GHz The following chart can be used to determine the operating level at a particular frequency considering the operating linear tilt.

  • Page 105: Amplifier Output "Linear" Tilt Chart For 870 Mhz

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Example If the amplifier’s 1 GHz output level is 49.0 dBmV with a linear operating tilt of 14.5 dB (from 50 to 1 GHz), the corresponding output level at 750 MHz would be 45.1 dBmV. This was found by taking the difference in tilt between 1 GHz and 750 MHz (14.5 –...

  • Page 106: Forward Cable Equalizer Charts

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Forward Cable Equalizer Charts 1.2 GHz Forward Cable Equalizer Loss Chart The following chart shows the 1.2 GHz forward cable equalizer loss: FORWARD EQ VALUE (dB) INSERTION LOSS TOTAL TILT 1.2 GHz 1 GHz 1.2 GHz...

  • Page 107: Ghz Forward Cable Equalizer Loss Chart

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 1 GHz Forward Cable Equalizer Loss Chart The following chart shows the 1 GHz forward cable equalizer loss: TOTAL EQ VALUE INSERTION LOSS AT (MHz) TILT (52 – 1000 (dB) 1000 MHz) 10.5...

  • Page 108: 870 Mhz Forward Cable Equalizer Loss Chart

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 870 MHz Forward Cable Equalizer Loss Chart The following table shows the 870 MHz forward cable equalizer loss: TOTAL EQ VALUE INSERTION LOSS AT (MHz) TILT (52 – 870 (dB) MHz) 10.5...

  • Page 109: Reverse Cable Equalizer Charts

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Reverse Cable Equalizer Charts 42 MHz and 40 MHz Reverse Cable Equalizer Loss Chart The following table shows the 42 MHz reverse cable equalizer loss: NOTE: The 42 MHz reverse equalizer also works as a 40 MHz reverse equalizer in systems that use 5-40 MHz reverse amplifiers.

  • Page 110: 42 Mhz And 40 Mhz Thermal Reverse Cable Equalizer Loss At 25°C Ambient

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 42 MHz and 40 MHz Thermal Reverse Cable Equalizer Loss at 25°C Ambient The following table shows the 42 MHz and 40 MHz thermal reverse cable equalizer loss: EQ VALUE INSERTION LOSS AT (MHz)

  • Page 111: Inverse Cable Equalizer Charts

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Inverse Cable Equalizer Charts 1.2 GHz Forward Inverse Cable Equalizer Loss Chart The following table shows the 1.2GHz forward inverse cable equalizer loss: FORWARD EQ VALUE (dB) INSERTION LOSS TOTAL TILT 1.2 GHz...

  • Page 112: Ghz / 870 Mhz Forward Inverse Cable Equalizer Loss Chart

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide 1 GHz / 870 MHz Forward Inverse Cable Equalizer Loss Chart The following table shows the 1.2GHz, 1 GHz and 870 MHz forward inverse cable equalizer loss: INV EQ VALUE (dB)

  • Page 113: Glossary

    QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Glossary...
  • Page 114 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Ampere A unit of measure for electrical current. ac / AC: Alternating Current An electric current that reverses its direction at regularly recurring intervals. AGC: Automatic Gain Control A process or means by which gain is automatically adjusted in a specified manner as a function of input level or other specified parameters.
  • Page 115 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide Gain: A measure of the increase in signal level, relative to a reference, in an amplifier. Usually expressed in decibels. GHz: Gigahertz A unit of frequency equal to one billion cycles per second.
  • Page 116 QUANTUM12 1.2GHz SYSTEM AMPLIFIER | Installation and Operation Guide S/N or SNR: Signal-to-Noise Ratio The ratio, in decibels, of the maximum peak-to-peak voltage of the video signal, including synchronizing pulse, to the root-mean- square voltage of the noise. Provides a measure and indication of signal quality.
  • Page 117 13139 Jess Pirtle Boulevard Sugar Land, TX 77478 AOI and the AOI logo are trademarks or registered trademarks of AOI and / or its affiliates in the U.S. and other countries. To view a list of AOI trademarks, go to this URL:...

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