DO4918
Squeak 1.5 WHAM2 [WH4924 – WH4931]
DO4918 — Squeak 1.5 WHAM2 Preliminary Datasheet (rev. 3.0) 2006-04-06
Copyright © 2006 Eleven Engineering Inc. (all rights reserved)
Page 1 of 47
GENERAL DESCRIPTION
The Squeak 1.5 WHAM2 (Wireless HiFi Audio Module) is a
highly integrated module package that provides a complete
solution for wireless audio. Squeak 1.5, using the Micro Linear
ML2724 radio transceiver front end and the XInC2 wireless
processor, is ideal for high performance wireless audio
applications such as home theater, stereo and outdoor
speakers, and microphones. Squeak 1.5 is available in either a
25 or 50 meter indoor range WHAM2 module.
The WHAM2 digitizes a 2-channel stereo input signal, sends it
across a robust 2.4 GHz radio frequency link, and converts the
signal back to a stereo analog signal for use at a remote
location. WHAM2 is also available with a Digital Audio Serial
Interface (DASI) port that can be configured to interface with
any SPI supporting device (I
2
S, left- or right-justified), including
ADCs, DACs, digital audio streams such as S/P-DIF or USB. A
development kit is required to modify the DASI port and/or to
modify application source code firmware.
FEATURES
• Analog or Digital Audio Input/Output
• 48 kHz, 16-bit digital, stereo audio transmission
• Digital volume control, manual mute
• Auto mute (when signal lost), digital noise gate
• 2.4 GHz wireless at 1.536 Mbps
• Robust Quality of Service (QoS)
• Advanced error protection protocols with hardware
forward error correction, adaptive frequency hopping, and
walking frequency diversity
• 25 or 50 meter indoor range
• Up to 6 transmitters in specified range area
• Low latency; firmware selectable 15 – 64 ms
• Duplex utility control channel at 1.5 kbps
• Programmable for custom features (with development kit)
ORDERING INFORMATION
25 meter 50 meter
TX WH4924 WH4928
Analog I/O
RX WH4925 WH4929
TX WH4926 WH4930
Digital I/O
RX WH4927 WH4931
2-node EV4931 EV4937
Evaluation Kit
Add-on node EV4933 EV4939
Dev. Kit
Upgrade from any eval. kit DK4909
BLOCK DIAGRAM
High–Performance 2.4 GHz Digital Wireless Audio Solution
ES250PW
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