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Product Registration | Knowledge Base | Software Downloads | Support Documents Knowledge Base Search Keywords | Search Text | Index by Description | Index by Tip ID
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Selecting a Bluetooth Sync Mode Selecting a synchronization mode FTS4BT FTS needs to know how to synchronize with the piconet. FTS supports three Synchronization Modes. Slave Inquiry Mode - This is the preferred synchronization mode to use. FTS performs an inquiry of the slave device to obtain its Bluetooth clock. FTS then enters continuous page scan mode, using the slave's Bluetooth clock and address to calculate the correct page scan frequencies. When the master pages the slave, FTS switches to the master's Bluetooth clock and then follows the master's frequency hopping sequence. This synchronization mode requires that the slave has inquiry scan enabled and is page scanning prior to being paged by the master. We have found that synchronization is more consistent in Slave Inquiry mode when the ComProbe is kept closer to the master than the slave. Master Inquiry Mode FTS performs an inquiry of the master device to obtain its Bluetooth clock then follows the master's frequency hopping sequence. This synchronization mode requires that the master have inquiry scan enabled. Slave Page Mode FTS pages the slave device to obtain an estimate of its Bluetooth clock; however, the paging process does not get completed so the slave device times out and returns to page scanning. FTS then enters continuous page scan mode, using the slave's estimated Bluetooth clock and the slave's address to calculate the page scan frequencies. When the master pages the slave, FTS switches to the master's Bluetooth clock and then follows the master's frequency hopping sequence. This synchronization mode requires that the slave is page scanning prior to being paged by the master. This synchronization mode is considered to be passive because the Bluetooth host is never made aware of the page made by FTS since the paging process does not get completed. Slave Page mode was broken in firmware versions between 44 and 46. If you are not able to sync in Slave Page mode, update your firmware to version 47.
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