Amplifier Above 110ºF, Below 32ºF | Motorola RF Amplifier guide

4STARLINE

5Verify that the input level agrees with the design specification input. If the level is different from design, adjust accordingly.

For example: the design level is 19 dBmV at the highest frequency and the design pad value is JXP-3B. If the actual measured level is 21 dBmV, then you must change the pad to a JXP-5B.

If the actual levels are significantly different from the design levels, it is recommended that you investigate or consult system management before proceeding.

6Connect the signal level meter to the output test point and tune the meter to the high-end channel.

7Turn the manual gain reserve (MAN) control to maximum (fully clockwise) and then reduce the output by the amount indicated below:

Amplifier	Above 110ºF	32ºF to 110ºF	Below 32ºF
BLE/	3 dB	4 dB	5 dB
MB/	4 dB	5 dB	6 dB
BT/	4 dB	5 dB	6 dB
MBE/	3 dB	4 dB	5 dB

8Check the amplifier output tilt by measuring the high band- and the low band-edge carriers:

!High = channel 116 (745.25 MHz) or channel 136 (865.25 MHz)

!Low = channel 2 (55.25 MHz) or channel 3 (61.25 MHz)

!If the tilt is less than required, install a higher value SFE-*-*

!If the tilt is greater than required, install a lower value SFE-*-*

!If the high value equalizer provides too much tilt and the low value equalizer provides too little tilt, use the lower value equalizer. Under-equalization is preferential to over-equalization.

9You must adjust the input pad if you use a STARLINE Cable Simulator (SCS-*) and the design value is changed.

For each 1 dB increase in SCS-*value, 1 dB of loss is introduced at 750 MHz or 1.1 dB of loss at 870 MHz. Therefore, to maintain a proper gain level it is necessary to adjust the input pad value as follows:

!For each increase in SCS-*value, decrease the input pad by 1 dB.

!For each decrease in SCS-*value, increase the input pad by 1 dB.

!If you replace an SFE-*-*with an SCS-*, reduce the value of the input pad by the value of the SCS-*.

10Measure the output level at the highest frequency. It should be within 1 dB of the system design level. If it is not, you must adjust the interstage pad and/or the output pads accordingly.

The input pad is normally changed to accommodate excessive input levels. Because it only attenuates excess signal, it has no effect on the overall performance of the amplifier.

RF Amplifier Quick Start Guide

RF Amplifier specifications

Motorola RF Amplifiers are integral components in radio frequency applications, known for their reliability and superior performance across various telecommunications platforms. These amplifiers are designed to enhance the strength of radio signals for wireless communications, ensuring clear and stable transmission over longer distances.

One of the key features of Motorola RF Amplifiers is their ability to deliver high linearity. High linearity is crucial in reducing distortion in transmitted signals, which is especially important in applications like mobile communications, where signal clarity can significantly affect call quality and data transmission. This characteristic allows for greater efficiency and effectiveness in systems where multiple signals are present, such as in densely populated urban areas.

Another significant aspect of Motorola RF Amplifiers is their broad frequency range. These amplifiers can operate across various bands, from VHF to UHF and even higher frequencies, making them suitable for diverse applications ranging from public safety communications to broadcast services. The versatility in frequency response adapts to the needs of different devices and systems, making them a preferred choice for engineers and manufacturers alike.

The technology underpinning Motorola RF Amplifiers includes advanced materials and integrated circuit designs that allow for higher thermal efficiency and reduced power consumption. This is particularly important in battery-operated devices where energy efficiency leads to extended operational life. Additionally, the compact packaging of these amplifiers ensures that they can be easily integrated into a variety of devices without requiring excessive space.

Motorola also places a strong emphasis on durability and ruggedness in their RF Amplifiers. Many models are engineered to withstand harsh environmental conditions, making them suitable for outdoor installations and challenging applications. Their ability to perform consistently in extreme temperatures, moisture, and vibration enables deployment in critical infrastructure contexts like base stations and emergency services.

Moreover, Motorola RF Amplifiers typically include built-in protection features, such as thermal shutdown, over-voltage protection, and automatic gain control. These safeguards enhance the longevity and reliability of the amplifier, reducing the need for maintenance and offering peace of mind to operators who rely on these systems.

In conclusion, Motorola RF Amplifiers are characterized by their high linearity, broad frequency range, energy efficiency, and rugged durability. With advanced technologies and features that ensure optimal performance, they continue to meet the demands of contemporary wireless communication systems, solidifying Motorola’s reputation in the RF engineering field.