Motorola BLE100 operation manual Operating Tips, Using Amplifiers in Lower Frequency Systems

Page 43

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 BLE100 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 ADU/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 34 dB 1 GHz BLE with 14 dB of output tilt will lose approximately 1.3 dB of gain at 870 MHz, resulting in approximately

32.7dB 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 two pad facilities in the forward path: (1) the pad location (JXP-IN) at the input to the amplifier, and (2) the midstage pad (JXP-MID) located between the pre-amplifier and the output hybrid.

The input pad (JXP-IN) is normally changed to accommodate excessive input levels. When operating at the same output levels, a BLE100 with an input pad has the same carrier-to-noise (c/n) and distortion performance as a BLE100 without the input pad. Because it only attenuates excess signal, it has no effect on the overall performance of the BLE100.

If necessary, to achieve the gain specification, you can use the midstage pad (JXP-MID) to reduce the gain of the BLE100. However, this will affect amplifier performance. This pad location has minimal impact on the noise figure, therefore, carrier-to-noise performance is maintained. When operating at the same output levels, the midstage pad forces the pre-amplifier to operate at a higher output level, thereby degrading station distortion performance. Due to the superior distortion performance provided by the latest E-GaAs BLEs, this should not be a major concern assuming the pad value is reasonable.

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

BLE100 Installation and Operation Manual

Page 42 Page 44
Image 43
Page 42 Page 44
Contents Installation BLE100 Special Symbols That Might Appear on the Equipment Page Contents Operating Tips Bench TestingInstallation SpecificationsTables Torque Specifications Abbreviations and AcronymsAppendix B BLE100 closed IntroductionBLE BLE100 openRelated Documentation Using This ManualDocument Conventions Motorola Online http//businessonline.motorola.com If You Need HelpCalling for Repairs BLE100 base with electronics module OverviewBLE100 ordering matrix Ordering MatrixBLE-HSG/15 housing and dimensions HousingGaskets Housing gasketsPort Locations Housing portsBLE100 power supply Power SupplyForward Path BLE100 block diagramReturn Path Model Description Function Ingress Control SwitchOptions and Accessories BLE100 options and accessoriesSRE SFE-100SCS RCB JXP Field Practice Amplifier SetupProper Handling Procedures Bench SetupBefore You Begin Forward Path AlignmentExample Starline Cable EqualizersSlope SFE-100 Starline Forward Equalizers SFE-100Equalizer slope versus cable Frequency Cable slope in dB Starline Cable SimulatorsStarline Cable Simulators Flatness Control Input and Midstage PadsFrequency versus cable slope Bode Equalization Directional Coupler Test PointsLDR/9/1G component layout top-left, bottom-right Manual Gain Control Temperature Gain ReserveGain reserve versus ambient temperature Amplifier Level ControlAmplifier Setup Automatic Drive Unit/QAM Automatic Drive Unit ADU/QADU Pads and Levels Return Path AlignmentAlignment Procedure Powering and Surge Protection Before You Begin Bench TestingMeasuring Forward Gain Test Equipment and ConnectionsTest equipment connections for bench sweeping Example Completing the Test Procedures Testing Return Gain and ResponseAerial Installation InstallationCenter-conductor pin length Torque sequence J1 position DescriptionPedestal Installation Using Amplifiers in Lower Gain Systems Using Amplifiers in Lower Frequency SystemsOperating Tips Forward Amplifier SpecificationsSpecification Model BLE100SReturn Amplifier AC CurrentADU Automatic Drive Unit Torque Fastener Screw Wrench In-lbs Torque SpecificationsSize Abbreviations and Acronyms Visit our website at 527548-001 04/06

BLE100 specifications

The Motorola BLE100 is an innovative device designed for efficiency and reliability in the realm of Bluetooth Low Energy (BLE) technology. As a compact and multifunctional solution, it caters to diverse applications, from cost-effective asset tracking to improving smart home environments. The BLE100 stands out for its practicality, making it ideal for both personal and commercial use.

One of the standout features of the Motorola BLE100 is its low power consumption. Leveraging Bluetooth Low Energy technology, the device can operate for extended periods without frequent battery replacements—ideal for remote monitoring applications where long-lasting performance is crucial. This characteristic ensures that users can rely on the BLE100 for day-to-day operations without the hassle of constant recharging.

In terms of connectivity, the BLE100 boasts seamless and stable connections over considerable distances. With a range of up to 100 meters in open environments, the device excels in maintaining reliable communication even in challenging conditions. Its compatibility with a wide array of Bluetooth-enabled devices ensures versatile usability, allowing users to integrate the BLE100 into existing systems with ease.

The Motorola BLE100 also prioritizes user-friendly design. The device is lightweight and compact, ensuring ease of installation and portability. Its robust build makes it resilient against environmental factors, while its sleek design enhances its aesthetic appeal. Moreover, straightforward setup processes and user interfaces facilitate quick deployment for various applications.

Another notable characteristic of the BLE100 is its advanced security features. With built-in encryption and pairing mechanisms, users can safeguard their data and communication. This is particularly vital in applications requiring confidential or sensitive information transfer.

The device supports various protocols and adheres to international standards, which ensures versatility and compatibility in multiple applications. Whether it's intelligent home systems seeking efficient device interaction or logistics needing simple asset tracking solutions, the Motorola BLE100 meets diverse needs.

In conclusion, the Motorola BLE100 is a powerful device that marries efficiency, functionality, and security. Its low power usage, reliable connectivity, user-friendly design, and robust features make it a top choice for anyone looking to enhance their Bluetooth Low Energy applications. With the BLE100, users can explore a wide range of possibilities, from smart technology integration to simplified monitoring solutions, all designed to optimize performance while maintaining a user-centric approach.
Top Page Image Contents