JVC KENWOOD V5X004 Digital Wireless Audio Transceiver Module User Manual DWAM81

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Document ID	1131265
Application ID	G3g0FKrj9SzI3uFWTjP/Tg==
Document Description	User Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	7.95kB (99416 bits)
Date Submitted	2009-06-30 00:00:00
Date Available	2009-12-26 00:00:00
Creation Date	2009-06-24 12:12:00
Producing Software	Adobe PDF Library 9.0
Document Lastmod	2009-06-24 13:28:52
Document Title	DWAM81
Document Creator	Word 用 Acrobat PDFMaker 9.1
Document Author:	T.Saitou

DWAM81
Digital Wireless Audio Transceiver
Module
User’s Manual
Confidential for JVC company of Japan Limited.
1
DWAM81 Module
1.1
Product Description
The DWAM81 is an OEM module (42mx42m) based on the STS DARR-81. It is an
uncompressed wireless digital audio transceiver operating in the 2.4GHz ISM band.
The wireless audio link supports up to 4 uncompressed high quality and low latency
stereo channels in various network topologies. A unique set of protocols and algorithms
provides extreme wireless robustness, capable of dealing with multiple interference
sources as present in the 2.4GHz band. In addition, a wireless bi-directional data
channel is available (e.g. to control the volume of the receiver from the transmitter).
The module integrates all functionality for a wireless digital audio connection,
comprising;
DARR-81 Wireless Audio Processor
2.4GHz RF Transceiver
Embedded Antennas or Dual Antenna Connector
Digital audio interface (I2S and/or S/PDIF)
I2CControl interface
26 pins interface connector (FFC) for power, digital audio and control
interface and GPIOs
This device complies with Part 15 of the FCC Rules.Operation is subject to the following
two conditions:(1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
CHANGES
OR
MODIFICATIONS
NOT
EXPRESSLY
APPROVED
BY
THE
MANUFACTURER FOR COMPLIANCE COULD VOID THE USER'S AUTHORITY TO
OPERATE THE EQUIPMENT
The following sentence has to be displayed on the outside of the device in which the
transmitter module is installed:
"Contains FCC ID: ASIV5X004
"CAUTION: This device and its antenna(s) must not be co-located or operating in
conjunction with any other antenna or transmitter. End user cannot modify this transmitter
device. Any unauthorized modification made on the device could avoid the user's authority
Confidential for JVC company of Japan Limited.
to operate this device."
1.2
Basic Features
Secure, wide band, scrambled digital wireless link in the world-wide license
exempt 2400-2483.5 MHz ISM-band
The module is a reconfigurable platform and can host many applications,
including features such as automated TX/RX swapping
Optimal digital audio performance:

Up to 4 stereo uncompressed audio channels (44.1ksps. 48ksps or
96ksps, 16 or 24bit)

or optional proprietary low latency compression algorithm

Tight inter-speaker synchronization

Active TX-RX audio clock synchronization

Low latency (configurable from 10…20ms) to support e.g. lip-synced
applications

Bi-directional data channel for metadata or control data (up to
100kbps)

Simultaneous I2S and S/PDIF input/output (incl. S/PDIF detection)

Programmable digital audio gain

Soft audio muting under poor link circumstances

Sample rate converter, including automatic sample rate detection, to
support 32ksps, 44.1sps and 48ksps with a single audio crystal
Optimal wireless coexistence and robustness:

Advanced dedicated base band controller to provide an optimal level of
coexistence with all kinds of other wireless applications (e.g. WLAN,
BT, MWO, GSM, DECT)

Automatic frequency allocation with seamless RF channel switching

WLAN sniffer continuously for enhanced WLAN co-existence
Optimal wireless performance:

In-room or multi-room usage (point to multi-point is also supported)

Indoor range of up to 50m

Automatically
controlled
receiver/transmitter
antenna
spatial
diversity minimizes fading and multipath effects
Other features:

Wireless S/PDIF data pipe application to support e.g. wireless DTS

Wirelessly accessible registers (e.g. RF channel switching, audio
volume) and GPIO (e.g. use control switched and LED indicators)
Confidential for JVC company of Japan Limited.

Compliance with applicable US American laws, especially FCC Part
15.247 (FCC ID:ASIV5X004)

I2C Control bus

Power Down Duty Cycle mode: If no link is established, modules (both
TX and RX) will enter PDDC mode. In this mode the module
periodically tries to re-establish the link maintaining minimum power
consumption.

Pairing Function: All units in the same wireless audio network are
provided with a 16 or 24 bit network ID, shielding the network from
neighbor audio networks.

Single 3.3 Vdc power supply

Backwards compatible with DARR-80 and DARR-79 based products
Confidential for JVC company of Japan Limited.
2. DWAM81 Specifications
System Specifications
ID
Parameter
Value
Unit
RF Frequency Range
2400-2483.5
MHz
Number of RF channels
Remarks
RF Characteristics
Air framing
Addressing
24
Bit
Data message size
8,16 or 32
Byte
Application dependent
CRC
16,24 and 32
Bit
Hybrid
Control interface
I2C
Control
Compliant with the I2S
protocol
(slave),
0…400kbps. Base address
0x80, can be offset by A0
and A1 HW pins.
Data
Data Bandwidth
100
Kbps
Bi-directional
wireless
data channel
Data latency
ms
Minimum under good RF
link
conditions
for
applications that support
the 100kbps data rate
Interference Robustness
Fixed frequency devices (e.g.
Fully coexistent
WLAN, microwave oven)
Frequency hoppling devices
(e.g.
Bluetooth,
Fully coexistent
2.4GHz
cordless phones)
Audio Interface
Available Interface Types
I2S S/SPIF
Can
be
simultaneously
used
Incl.
S/SPIF detection.
Number
of
stereo
audio
1,2,3 or 4
Bidirectional, incl. audio
Confidential for JVC company of Japan Limited.
output channels on Module
loop
Unit
Number
of
stereo
audio
1,2,3 or 4
Bidirectional, incl. audio
output channels on Central
loop
Unit
Audio Quality
Sample rate
44.1, 48 or 96
Ksps
Sample width
16 or 24
bit
Latency
20
ms
Configurable from 10 to
20ms, depending on the
application.
Dynamic Range
THD+D
Frequency response
98
dB
16 bit 48ksps, A-weighted
146
dB
24 bit 48ksps, A-weighted
-96
dB
16 bit 48ksps
-143
dB
24 bit 48ksps
dB
20Hz…22kHz
42 x 42
mm
Dimensions
Board dimensions
Confidential for JVC company of Japan Limited.

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