Amplifier Setup

3-9

attenuation changes due to temperature. If necessary, you can control the Bode board manually using the potentiometer labeled manual level (MAN) in Figure 2-13.

Amplifier Level Control

Signal levels vary in a cable system primarily because cable attenuation changes with temperature. Other components such as passives and amplifier hybrids are also affected by temperature changes. To automatically compensate for these signal level fluctuations and control output level, you must select the optional ADU, QADU, or TDU. The use of the ADU, QADU, or TDU is recommended for improved output level stability.

When necessary and appropriate, you can also use manual gain control. The gain of the BT100 is then determined by the potentiometer marked MAN on the electronics chassis cover.

Manual Gain Control

To use manual gain control:

1Verify that the electronics chassis is installed correctly.

2Ensure that there is continuity in the forward path by installing the design-value forward equalizer and design value input JXP-*B attenuator.

3Ensure that the drive control select jumper is in the MAN position.

4Use a signal-level meter to measure the high band-edge carrier input level at the input test point: 750 MHz = channel 116, 870 MHz = channel 136, 1003 MHz = channel 158.

This carrier should be at standard analog level, non-scrambled.

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 (illustrated in Figure 2-13) to maximum (fully clockwise) and then reduce the output as noted in Table 3-3 below:

Table 3-3

Gain reserve versus ambient temperature

Temperature

 

 

Gain Reserve

°

°

 

3 dB

Above 110 F (43 C)

 

4 dB

° °

°

°

32 F (0 C) to 110 F (43 C)

 

°

°

 

5 dB

Below 32 F (0 C)

 

 

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

ƒHigh = channel 116 (745.25 MHz), channel 136 (865.25 MHz), or channel 158 (997.25 MHz).

BT100 Installation and Operation Manual

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Motorola BT100 operation manual Amplifier Level Control, Manual Gain Control, Temperature Gain Reserve
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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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