Amplifier Setup

3-3

STARLINE Forward Equalizers

Select the appropriate model SFE-100-* to compensate for cable attenuation versus frequency and to obtain the proper output tilt. The BT100 is equipped with the BDR-1G interstage equalizer and flatness board, which compensates for cable attenuation. You must compensate for any cable or passive slope beyond that of the BDR-1G by selecting and installing the appropriate SFE-100-* cable equalizer.

Equalizers are available in 1 dB steps from 0 dB to 22 dB. The following examples describe how to choose the correct equalizer.

Example 1

The amplifier location includes 20 dB of cable (at 1 GHz) between its input and the preceding amplifier. Consider cable loss only. Exclude any flat loss due to splitters or other passive devices. The internal equalizer, model BDR-1G, compensates for approximately 14 dB of cable. Subtract this cable length from the 20 dB of this example (20 − 14 = 6). The SFE-100-6 is the proper equalizer in this case. With this equalizer installed, the amplifier reproduces the output tilt of the last upstream amplifier.

When selecting an equalizer, choose the next lower value if the exact value is not available or in cases where the calculated value makes two choices possible.

Example 2

The BT100 amplifier is used in a link following a fiber node. The fiber receiver output is flat and connects to the input of the amplifier through 18 dB of cable plus passive loss. Determine which is the proper equalizer to achieve 11 dB output tilt from the BT100.

Calculate the equalizer value using the following equation:

 

SLOPEeq

= TILTout + SIGlo – SIGhi – SLOPEieq

where:

SLOPEeq

= required SFE-100-* slope

 

TILTout

= required amplifier output tilt

 

SIGlo

= signal input level at 54 MHz (channel 2)

 

SIGhi

= signal input level at 1 GHz

 

SLOPEieq

= interstage equalizer slope (14 dB)

From various references, such as manufacturer’s catalogs, you can determine that at an operating frequency of 1003 MHz, 18 dB of cable produces approximately 3.6 dB of loss at 54 MHz. This suggests that the channel 2 signal input to the BT100 is 14.4 dB greater

(18 − 3.6 = 14.4) than it is at 1003 MHz. Our example assumes that the high-end frequency level into the BT100 is +12 dBmV.

Substituting this information into the above equation provides the following result: 11 dB + 26.4 dB − 12 dBmV − 14 dB = 11.4 dB

The slope of the required equalizer is 11.4 dB. Table 3-1 and the graph in Figure 3-1 show that

11.4dB of slope is caused by approximately 14 dB of cable at 1003 MHz. Therefore the correct equalizer is model SFE-100-14.

When selecting an equalizer, choose the next lower value if the exact value is not available or in cases where the calculated value makes two choices possible.

BT100 Installation and Operation Manual

Page 27 Page 29
Page 28
Image 28
Motorola BT100 operation manual Starline Forward Equalizers, Example
Page 27 Page 29

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.
Top Page Image Contents