Motorola BT100 operation manual Return Path Alignment, ADU/QADU Pads and Levels

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3-12

Amplifier Setup

2Verify that the frequency stamped on the ADU/QADU control unit is the same as the system pilot frequency. For the ADU, the pilot frequency is a CW pilot or an available NTSC television channel not scrambled using sync suppression and not a digital channel. For the QADU, the pilot signal is a QAM modulated digital channel.

3Position the drive control select jumper to AUTO.

4Connect a signal-level meter to the FWD OUT test point and tune the meter to the high band-edge carrier.

5Turn the auto level (ADU) potentiometer (illustrated in Figure 2-13) fully clockwise and then reduce to obtain the level obtained in Step 9 under Manual Gain Control.

ADU/QADU Pads and Levels

This subsection provides information regarding the proper ADU/QADU padding requirements for the BT100.

A JXP-*B pad is installed in the input line to the ADU/QADU location. This pad adjusts the ADU/QADU input level for the standard application of the BT100 but you can change this pad depending on the operational output of the BT100.

In the BT100 analog ADU circuit, a JXP-7B pad is generally recommended. This is the standard ADU pad value as shipped from the factory and is appropriate for an amplifier output level range from +43 dBmV to +49 dBmV at 550 MHz. Use a JXP-1B pad for output levels below +43 dBmV and a JXP-11B for output levels above +49 dBmV.

The standard pad for the QADU is a JXP-0B. This pad value works for a BT100 output level from +38 dBmV to +47 dBmV at 550 MHz. Use a JXP-7B when operating above +47 dBmV at 550 MHz.

Motorola does not recommend operating the BT100 above +46 dBmV at 550 MHz.

Use of an ADU or QADU is recommended for improved output level stability although you can operate the BT100 in the manual mode. Select manual mode by placing the drive control select jumper, illustrated in Figure 2-13, in the MAN position. The gain of the BT100 is then determined by the potentiometer marked MAN on the amplifier cover.

Return Path Alignment

The following subsections describe the BT100 alignment procedures required for proper performance in the return path.

Before You Begin

Before you begin to set-up the amplifier and perform return-path alignment, please read the following instructions and recommendations.

For proper return alignment obtain:

ƒRF alignment levels and insertion points for all BT100s

ƒRF reference output level of the headend optical receivers Equipment required for return-path alignment includes:

ƒFull complement of JXP-*B pads and STARLINE Return Equalizers (SRE-100-*)

BT100 Installation and Operation Manual

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Contents Installation Special Symbols That Might Appear on the Equipment FCC Compliance Contents Installation Bench TestingSpecifications Torque Specifications Abbreviations and AcronymsTables FiguresIllustrates a closed BT100 IntroductionIllustrates an open BT100 Related Documentation Document Conventions Using This ManualTechnical Response Center If You Need HelpCalling for Repairs Overview Illustrates the various output-port configurations Identifies and describes the model strings Ordering GuideHousing Overview2-5 Illustrates the housing gaskets Housing GasketsPort Locations Power SupplyBT100 power supply Forward Path BT100*-4* four output block diagram Return Path Ingress Control Switch Model Description Function Options and AccessoriesJXP-RPC Proper Handling Procedures Amplifier SetupBench Setup Field PracticeBefore You Begin Forward Path AlignmentExample Starline Forward EqualizersStarline Forward Equalizers SFE-100 SCS Frequency Cable slope in dB Starline Cable SimulatorsInformation in -2 is shown as a graph in Figure Input, Midstage, and Output PadsFlatness Control Bode Equalization Directional Coupler Test PointsAmplifier Level Control Temperature Gain ReserveManual Gain Control Thermal Drive Unit Automatic Drive Unit/QAM Automatic Drive Unit ADU/QADU Pads and Levels Return Path AlignmentAlignment Procedure Powering and Surge Protection Before You Begin Bench TestingTest Equipment and Connections Measuring Forward Gain Example Testing Return Gain and ResponseCompleting the Test Procedures Aerial Installation InstallationTorque sequence Jumper position DescriptionGrounding the BT100 Pedestal InstallationUsing Amplifiers in Lower Gain Systems Using Amplifiers in Lower Frequency SystemsOperating Tips Specification SpecificationsModel BT100 Forward AmplifierAC Current Parameter SpecificationRA-Kit/H Return Amplifier ADU/QADU Automatic Drive UnitTorque Fastener Screw Size Wrench Size In-lbs Torque SpecificationsCTB Abbreviations and AcronymsVisit our website at 527550-001-a

BT100 specifications

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Overall, the Motorola BT100 combines functionality, style, and cutting-edge technology. Its impressive battery life, comfort-oriented design, exceptional sound quality, and seamless connectivity make it an ideal choice for anyone looking for a reliable Bluetooth headset. Whether for business, leisure, or everyday use, the BT100 stands as a testament to Motorola's expertise in crafting high-quality telecommunications devices.
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