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Anaren A8520E24A91 User Manual

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Anaren Integrated Radio
A8520E24A91 Users
Manual
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Release Date Dec 27
2010

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Summary of Contents for Anaren A8520E24A91

  • Page 1 Anaren Integrated Radio A8520E24A91 Users Manual Release Date Dec 27 2010...
  • Page 2 Page ii of 28 A8520E24A91 – Users Manual Release Date: Dec 27 2010 THIS PAGE LEFT INTENTIONALLY BLANK...

  • Page 3: Table Of Contents

    U s e r s M a n u a l Model A8520E24A91 Contents Overview ................................5     1.1. Features ............................... 6     Theory of Operation ............................6     2.1. Network Topology and Nomenclature ....................9  ...
  • Page 4 Page iv of 28 A8520E24A91 – Users Manual Release Date: Dec 27 2010 THIS PAGE LEFT INTENTIONALLY BLANK...

  • Page 5: Overview

    United States (FCC) and Canada (IC). The modular approval allows the end user to place an A8520E24A91 module inside a finished product without having to perform costly regulatory testing for an intentional RF radiator. Section 3 has information on the requirements for the end user/integrator must fulfill to use the modules without intentional radiator regulatory testing.

  • Page 6: Features

    Simple certification labeling replaces testing. 2. Theory of Operation The A8520E24A91 interfaces directly to a audio Codec chip through the I S for audio data and though I C fro volume control and other Codec chip settings.
  • Page 7 A8520E24A91 – Users Manual Page 7 of 28 Release Date: Dec 27 2010 o The protocol implements an entire wireless audio transport mechanism with adaptive frequency usage, retransmission of lost packets as well as a low data rate link for remote control purposes.
  • Page 8 DNC (AVdd_CC259x) CC259x AVdd Bias 100k XPAEN/GIO14 XLNAEN/GIO15 AVdd 48MHz DVdd 100k VBAT VBAT IOVdd IOVdd AD2/GIO9 AD2/GIO9 WCLK WCLK GIO12 GIO12 BCLK BCLK GIO13 GIO13 MCLK MCLK RSTN RSTN Figure 1 the functionality of the A8520E24A91, using an integral antenna...

  • Page 9: Network Topology And Nomenclature

    2.1. Network Topology and Nomenclature A A8520E24A91 network consists of one Protocol Master (PM) and one or two Protocol Slave(s) (PS). The PM provides the audio reference clock and controls network association. The PS regenerate the audio reference clock based on the packets received. Audio can be transmitted from the PM to a PS.

  • Page 10: Adaptive Frequency Hopping

    Page 10 of 28 A8520E24A91 – Users Manual Release Date: Dec 27 2010 Figure 2 A8520E24A91 topologies supported for different A8520E24A91 FW revisions 2.2. Adaptive Frequency Hopping The purpose of using frequency hopping in a radio system is to provide diversity that allows data throughput to be maintained even if interfering radio systems or the physical environment (e.g.
  • Page 11 A8520E24A91 – Users Manual Page 11 of 28 Release Date: Dec 27 2010 minimum data throughput is to be guaranteed (as audio streaming requires). Frequency hopping systems can either implement a fixed sequence of channel hops or adapt its hopping sequence dynamically to the changing environment it operates in.
  • Page 12 Page 12 of 28 A8520E24A91 – Users Manual Release Date: Dec 27 2010 Figure 3 Example of AFH hop sequence (active set in color, trial set in black/gray) The frequency hopping algorithm, when no swaps between the active and trial channel sets occur, goes through a sequence of 70 hops over the course of which every RF channel has been used.

  • Page 13: Applications

    Wireless studio equipment  Wireless microphones 3. Product Approvals The A8520E24A91 have been designed to meet FCC and Industrie Canada (IC) regulations. In particular the radio modules have been certified to the following. 3.1. USA (Federal Communications Commission, FCC, The A8520E24A91, with integrated antenna has been tested to comply with FCC CFR47 Part 15 sub-part C “Intentional Radiators.

  • Page 14: Fcc Labeling Requirements

    2010 3.1.1. FCC Labeling Requirements The A8520E24A91 modules have been labeled with their own FCC ID number and if the FCC ID is not visible when the module is installed inside another device, then the outside of the finished product into which the module is installed must also display a label referring to the enclosed module.

  • Page 15: Rf Exposure

    The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. If the A8520E24A91 module is used in a portable application (antenna is less than 20 cm from persons during operation), the integrator/OEM is responsible for performing Specific Absorption Rate (SAR) testing in accordance with FCC rules 2.1093.
  • Page 16 Page 16 of 28 A8520E24A91 – Users Manual Release Date: Dec 27 2010 provided in the original description, of one or more separately certified modules it contains, were not followed. 3.2.1. IC Labeling Requirements From section 3.2.1 RSS-Gen, Issue 3, December 2010, Labeling Requirements for the Host Device: The host device shall be properly labeled to identify the modules within the host device.

  • Page 17: Potential Interference Sources

    émetteur ne doit pas être co-localisés ou fonctionner conjointement avec une autre antenne ou transmetteur. If the A8520E24A91 module is used in a portable application (antenna is less than 20 cm from persons during operation), the integrator/OEM is responsible for performing Specific Absorption Rate (SAR) testing in accordance with IC rules and methods of RSS-102.

  • Page 18: Electrical Characteristics

    Page 18 of 28 A8520E24A91 – Users Manual Release Date: Dec 27 2010 adaptive thresholds to ensure that the audio network is given its fair share of RF spectrum in very crowded RF environments. 4. Electrical Characteristics 4.1. Absolute Maximum Ratings Under no circumstances must the absolute maximum ratings given in Table 1 be violated.

  • Page 19: Operating Conditions

    A85xxE24A91 – Users Manual Page 19 of 28 Release Date: Dec 1 2010 Parameter Unit Condition/Note Supply Voltage (Vdd) -0.3 Voltage on any digital pin -0.3 Vdd+0.3, max 3.6 RF input power Storage Temperature ˚C Solder reflow temperature ˚C According to IPC/JEDEC J- STD-020D <500 According to JEDEC STD 22,...
  • Page 20 Page 20 of 28 A85xxE24A91 – Users Manual Release Date: Dec 1 2010 Figure 4 Module pin-out view...
  • Page 21 A85xxE24A91 – Users Manual Page 21 of 28 Release Date: Dec 1 2010 Pin Name Pin Type Description Common DNC (RF- Connecting this pin to anything will significantly affect the performance of the module and Test) may void the end users right, under FCC, to operate the module Common Power/Decoup This pin should not be used unless deemed necessary in particular noisy power supply...

  • Page 22: Recommended Layout

    Page 22 of 28 A85xxE24A91 – Users Manual Release Date: Dec 1 2010 4.4. Recommended Layout Figure 5 Recommended PCB layout.

  • Page 23: Power Supply Considerations

    A85xxE24A91 – Users Manual Page 23 of 28 Release Date: Dec 1 2010 Figure 7 Mounting the module along an Figure 6 Mounting the module in a corner edge 4.5. Power Supply Considerations Noise on the power supply line reduces the sensitivity of a receiver and can modulate onto a transmitters signal, both of which causes a degradation of link quality and hence a reduction in range.

  • Page 24: Configuration And Programming

    It can be useful to set a lower power for systems that do not require the full range and thus save on power consumption. The typical power consumption at 3.3v supply for a A8520E24A91 module is shown below depending on the output power setting.

  • Page 25: Programming

    A85xxE24A91 – Users Manual Page 25 of 28 Release Date: Dec 1 2010 Master Radio Page Slave Radio Page Target power, set to 0 or lower Alternatively the power calibration can be done immediately after programming of each module using the SPI host controller interface, using the function.
  • Page 26 Page 26 of 28 A85xxE24A91 – Users Manual Release Date: Dec 1 2010 Check SWR Proceed only if SWR matches required value (Reset device and Restart programming again) // For each flash page for (int n = 0; n < 31; n++) { // Write page data to the start of the available RAM area SET_ADDR(0x6000, sw);...
  • Page 27 A85xxE24A91 – Users Manual Page 27 of 28 Release Date: Dec 1 2010 HISTORY Date Author Change Note No./Notes Aug 8 2010 Kirkeby Initial Draft Dec 1 2010 Kirkeby Initial Release, formatting and content chg. Dec 13 2010 Kirkeby Programming and Tx power setting.
  • Page 28 Thank you for learning more about the Anaren Integrated Radio (AIR) module line. If you have additional questions, need samples, or would like a quote – please do not hesitate to email the AIR team AIR@anaren.com or contact any of these authorized distributors of the AIR product line.

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