JVC KENWOOD V5X004 Digital Wireless Audio Transceiver Module User Manual DWAM81
JVC KENWOOD Corporation Digital Wireless Audio Transceiver Module DWAM81
User Manual
Confidential for JVC company of Japan Limited.
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 Remarks
RF Characteristics
RF Frequency Range 2400-2483.5 MHz
Number of RF channels 3
Air framing
Addressing 24 Bit
Data message size 8,16 or 32 Byte Application dependent
CRC 16,24 and 32 Bit Hybrid
Control
Control interface I2C
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 5 ms
Minimum under good RF
link conditions for
applications that support
the 100kbps data rate
Interference Robustness
Fixed frequency devices (e.g.
WLAN, microwave oven)
Fully coexistent
Frequency hoppling devices
(e.g. Bluetooth, 2.4GHz
cordless phones)
Fully coexistent
Audio Interface
Available Interface Types I2S S/SPIF
Can be used
simultaneously Incl.
S/SPIF detection.
Number of s
tereo audio
1,2,3 or 4
Bidirectional, incl. audio
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output channels on Module
Unit
loop
Number of stereo audio
output channels on Central
Unit
1,2,3 or 4
Bidirectional, incl. audio
loop
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 98
146
dB
dB
16 bit 48ksps, A-weighted
24 bit 48ksps, A-weighted
THD+D -96
-143
dB
dB
16 bit 48ksps
24 bit 48ksps
Frequency response 0 dB 20Hz…22kHz
Dimensions
Board dimensions 42 x 42 mm