Introduction to Bluetooth Bluetooth Overview
2-2 PN: 13000-00205 Rev. N MT8852B Operation Manual
Test Mode
In addition to normal operation, the Bluetooth specification also defines a test mode. Test
mode is mandatory for product qualification and included to assist compliance testing of the
radio and baseband layers. The tester sends a command that forces the EUT to enter test
mode. When enabled, the EUT no longer supports normal operation. Test mode enables a test
instrument to put the EUT into the following states:
• Loopback mode
• TX mode
• Payload (PRBS9, 10101010, 11110000)
• Hopping (On or Off)
• Packet length (DH1, DH3, DH5, 2DHx, and 3DHx)
RF Test Specification Overview
The Bluetooth specification was initially developed in 1994 based on frequency-hopping
spread spectrum technology. In 1998 the specification was formalized by the SIG and has
passed through a number of versions since.
• Bluetooth 1.0 and 1.0B
The initial specifications used to develop early devices.
• Bluetooth 1.1
Added support for non-encrypted channels and also for Received Signal Strength
Indicator (RSSI).
• Bluetooth 1.2
• Provided faster discovery and connection.
• Added Adaptive Frequency Hopping (AFH), to improve resistance to radio
frequency interference.
• Higher transmission speeds.
• Extended Synchronous Connections (eSCO), which improved voice quality of
audio links.
• Host Controller Interface (HCI) support for three-wire UART.
• Ratified as IEEE Standard 802.15.1-2005.
• Introduced Flow Control and Retransmission Modes for L2CAP.
• Bluetooth 2.0 (November 2004)
Introduced Enhanced Data Rate (EDR) for data transfer at up to three times previous
transmission speeds.
• Bluetooth 2.1 (July 2007)
Introduced Extended Inquiry Response (EIR), Encryption pause/resume (EPR), and
Secure simple pairing (SSP).
• Bluetooth 3.0 + HS (April 2009)
Introduced AMP (Alternate MAC/PHY), the addition of 802.11 as a high speed
transport.
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