Motorola BT100 operation manual Operating Tips, Using Amplifiers in Lower Frequency Systems

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Section 6

Operating Tips

This section describes using amplifiers in lower frequency systems and in lower gain systems.

Using Amplifiers in Lower Frequency Systems

When using the BT100 in 870 MHz or 750 MHz systems, you must consider the best method for handling the reduced bandwidth and channel-loading requirement. The following information helps you determine the best approach.

For distribution systems designed and installed as 1 GHz systems, but carrying a reduced channel load, there are no further concerns. You can add or remove channels at your discretion. If the system operates with ADUs/QADUs, the pilot channel cannot be disturbed. Reduced channel loading improves distortion.

For lower-frequency systems, such as 870 MHz or 750 MHz, you will need to take into account the reduced gain from 1 GHz. Due to the amplifier tilt, there will be some loss in gain from the published operational specification at 1 GHz. For example, a 42 dB 1 GHz BT100, with 14 dB of output tilt, will lose approximately 1.3 dB of gain at 870 MHz, resulting in approximately

40.7dB of gain at 870 MHz. If you need to adjust tilt, you may accommodate by changing the forward equalizer (SFE) value. Also, to avoid any additional loss in gain, it is optimal to use the equalizers that match the system frequency. For an 870 MHz system, the SFE-87-*s are the best choice, even in a 1 GHz amplifier. Note also, that the equalizer cuts off at the frequency value for which it is designed. For example, an SFE-87-* cuts off frequencies above 870 MHz. Therefore, if you have a 1 GHz system and need the equalizer to perform to 1 GHz, you must use an SFE-100-*.

Using Amplifiers in Lower Gain Systems

There are three pad facilities in the forward path: (1) is the pad location (JXP IN) at the input to the amplifier, (2) is the midstage pad (JXP) located between the pre-amplifier and the interstage hybrid, and (3) are the output pads (JXP OUT, JXP 1, JXP 3, and JXP 4) located between the interstage hybrid and the output hybrids.

The input pad (JXP IN) is normally changed to accommodate excessive input levels. When operating at the same output levels, a BT100 with an input pad has the same carrier-to-noise (c/n) and distortion performance as a BT100 without the input pad. Because it only attenuates excess signal, it has no effect on the overall performance of the BT100.

If necessary, to achieve the amplifier gain specification, you can use the midstage pad (JXP) or output pads (JXP OUT, JXP 1, JXP 3, and JXP 4) to reduce the gain of the BT100. However, this will affect amplifier performance. Output padding degrades the station distortion performance while having minimal effect on the carrier-to-noise performance. Midstage padding is the opposite and therefore has little effect on distortions, but degrades the carrier-to-noise performance. In general, we recommend you pad to the amplifier gain specification on the output. However, if you are unsure about the optimal padding technique for your system, we recommend you split the required padding evenly between the midstage and output pads.

It is recommended that you contact Motorola’s TRC or your account representative for more specific information regarding use of the midstage and output pads.

BT100 Installation and Operation Manual

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Contents Installation Special Symbols That Might Appear on the Equipment FCC Compliance Contents Torque Specifications Abbreviations and Acronyms Bench TestingInstallation SpecificationsTables 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 Field Practice Amplifier SetupProper Handling Procedures Bench SetupBefore 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 PointsManual Gain Control Temperature Gain ReserveAmplifier Level Control Thermal Drive Unit Automatic Drive Unit/QAM Automatic Drive Unit ADU/QADU Pads and Levels Return Path AlignmentAlignment Procedure Powering and Surge Protection Test Equipment and Connections Bench TestingBefore You Begin Measuring Forward Gain Example Testing Return Gain and ResponseCompleting the Test Procedures Aerial Installation InstallationTorque sequence Jumper position DescriptionGrounding the BT100 Pedestal InstallationOperating Tips Using Amplifiers in Lower Frequency SystemsUsing Amplifiers in Lower Gain Systems Forward Amplifier SpecificationsSpecification Model BT100ADU/QADU Automatic Drive Unit Parameter SpecificationAC Current RA-Kit/H Return AmplifierTorque Fastener Screw Size Wrench Size In-lbs Torque SpecificationsCTB Abbreviations and AcronymsVisit our website at 527550-001-a

BT100 specifications

Motorola has long been a pioneer in telecommunications, and its BT100 model exemplifies the brand's commitment to innovation and reliability in the realm of Bluetooth technology. The Motorola BT100 is a Bluetooth headset that combines sleek design, advanced features, and robust performance, making it an ideal choice for users seeking hands-free convenience.

One of the standout features of the BT100 is its impressive battery life. With a talk time of up to 10 hours, users can engage in long conversations without the constant need to recharge. Additionally, the standby time stretches up to 200 hours, meaning the headset can remain powered for extended periods when not in use. This makes it a great companion for those who are always on the go.

In terms of design, the Motorola BT100 boasts a lightweight and ergonomic structure that ensures comfort during prolonged use. Its adjustable and flexible ear hook allows for a secure fit, accommodating various ear shapes and sizes. The sleek profile of the headset also makes it visually appealing, allowing it to blend seamlessly with any outfit, whether professional or casual.

The sound quality of the Motorola BT100 is another significant aspect that deserves mention. The headset is equipped with noise-cancellation technology, which minimizes background noise and enhances the clarity of voice calls. This feature is particularly beneficial in busy environments or noisy settings, ensuring that users can communicate effectively without distractions.

Connectivity is seamless with the BT100, which utilizes Bluetooth 5.0 technology, providing a stable connection with a range of up to 33 feet. This allows users to move around freely without being tethered to their devices. The headset is compatible with a wide variety of smartphones, tablets, and laptops, making it a versatile accessory for any tech-savvy individual.

Moreover, the Motorola BT100 is user-friendly, featuring intuitive controls that enable easy management of calls and media playback. The headset supports voice commands, allowing users to keep their hands free while still accessing essential functions.

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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