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Telit Wireless Solutions GE864 manual Frequency Behaviour, Power Supply Influence

Models: GE864

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GE864 Hardware User Guide

1vv0300694 Rev.10 - 10/06/08

10.8.2 Frequency Behaviour

The frequency behavior represents the effectiveness of the reproduction of the applied signals. Because its performance is related to a square driving waveform (whose amplitude varies from 0V to Vpp), if you modify the waveform (e.g. from square to sinus) the frequency response will change.

10.8.3 Power Supply Influence

Applying a signal whose amplitude is different from that suggested by manufacturer, the performance change following the rule “if resonance frequency fo increases, amplitude decreases”.

Because of resonance frequency depends from acoustic design, lowering the amplitude of the driving signal the response bandwidth tends to become narrow, and vice versa.

Summarizing:

Vpp ↑ Æ fo ↓

Vpp ↓Æ fo ↑

The risk is that the fo could easily fall outside of new bandwidth; consequently the SPL could be much lower than the expected.

10.8.4 Warning

It is very important to respect the sense of the applied voltage: never apply to the "-" pin a

voltage more positive than "+" pin : if this happens, the diaphragm vibrates in the opposite sense with a high probability to be expelled from its physical position , damaging the device forever .

10.8.5 Working Current Influence

In the component data sheet you will find the value of MAX CURRENT : this represents the maximum average current that can flow at nominal voltage without current limitation .

In other words it is not the peak current, which could be twice or three times higher.

If driving circuitry does not support these peak values , the SPL will never reach the declared level or the oscillations will stop.

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Telit Wireless Solutions GE864 manual Frequency Behaviour, Power Supply Influence, Working Current Influence
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GE864 specifications

The Telit Wireless Solutions GE864 is a compact yet robust cellular module designed for a wide range of M2M (Machine-to-Machine) applications. As part of the Telit family, the GE864 is particularly notable for its small form factor, reliability, and versatility, making it an ideal choice for various industries including automotive, healthcare, and utilities.

One of the standout features of the GE864 is its integrated GPRS capabilities, allowing devices to connect to cellular networks seamlessly. With a maximum data rate of 85.6 kbps for downlink and 42.8 kbps for uplink, this module facilitates efficient data transmission, suitable for applications that require real-time data monitoring and control.

The GE864 supports multiple frequency bands, ensuring global compatibility. It can operate on GSM/GPRS networks, enhancing its usability across different regions. This multi-band support allows developers to deploy their solutions in diverse markets without modifying the hardware, thus saving both time and resources.

Power management is another critical area where the GE864 shines. The module comes equipped with advanced power-saving features, allowing it to operate effectively in battery-powered applications. Notable features include sleep modes and intelligent power management protocols that help extend battery life while maintaining reliable connectivity.

In terms of physical specifications, the GE864 has a compact design, measuring only 29x38 mm, which is essential for integration into space-constrained environments. This makes it particularly well-suited for applications in remote monitoring, asset tracking, and utility metering.

The module supports a range of interfaces, including UART, USB, and I2C, providing developers with the flexibility to connect various peripheral devices and sensors. This versatility enables the creation of customized solutions tailored to specific application needs.

Furthermore, the GE864 is designed to meet rigorous quality and durability standards, making it suitable for use in harsh environments. Its resilience to extreme temperatures and vibrations ensures dependable performance in challenging conditions, which is often a requirement in industrial and automotive applications.

In summary, the Telit Wireless Solutions GE864 is a feature-rich cellular module that combines compact design with robust performance and versatility. Its advanced connectivity options, efficient power management, and reliable operation make it an invaluable asset for businesses looking to develop innovative M2M solutions. Whether it’s for smart cities, telematics, or healthcare applications, the GE864 is engineered to meet the demands of today's connected world.