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Si4355
4.1.1. Configuration Wizard
The configuration wizard is available to easily identify the optimal device setup based on a few questions about the
desired application. Within this wizard, the user is able to define their system requirements and can see some
potential trade-offs for various settings. The wizard then provides a recommended configuration that is optimized
for the given application. This configuration can be further modified if needed to provide the desired setup.
4.1.2. Configuration Table
The configuration table is a list of predefined configurations that have been optimized for performance and
validated by Silicon Labs. These configurations are listed for many common application conditions and so most
users will be able to find the configuration they need in this table. These configurations are set to provide optimized
performance for a given application and can be implemented with low design risk. Once the list item is selected,
the specific frequency, and packet handler features can also be applied.
4.1.3. Radio Configuration Application
The Radio Configuration Application provides an intuitive interface for directly modifying the device configuration.
Using this control panel, the device parameters such as modulation type, data rate, and frequency deviation, can
be set. The EZConfig Setup then takes these parameters and automatically determines the appropriate device
register settings. This method allows the user to have complete flexibility in determining the configuration of the
device without the need to translate the system requirements into device specific properties. As with the other
EZConfig methods, the resulting configuration array is automatically generated and available for use in the user's
program.
4.2. Configuration Options
4.2.1. Frequency Band
The Si4355 can operate in the 283–350 MHz, 425–525 MHz, or 850–960 MHz bands. One of these three bands
will be selected during the configuration setup and then the specific receive frequency that will be used within this
band can be selected.
4.2.2. Modulation Type
The Si4355 can operate using On/Off Keying (OOK), Frequency Shift Keying (FSK), or Gaussian Frequency Shift
Keying (GFSK). OOK modulation is the most basic modulation type available. It is the most power efficient method
and does not require as high oscillator accuracy as FSK. FSK provides the best sensitivity and, therefore, range
performance but generally requires more precision from the oscillator used. GFSK is a version of FSK where the
signal is passed through a Gaussian filter, limiting its spectral width. As a result, the out of band components of the
signal are reduced.
The Si4355 also has an option for Manchester coding. This method provides a state transition at each bit and so
allows for more reliable clock recovery.
Clock
Data
1
0
1
0
0
1
1
1
Manchester
Figure 5. Manchester Code Example
16
Rev 1.0
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