OPERATIONAL DESCRIPTION

FCC ID: WE6-A7005111

Operational Description

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FCCID_982490

AireSurf Networks
SPK-1000
Operations Description

Version: 1.0

Sunday, July 27, 2008

Revision History
Revision Author Release Date Description of Change
1.0 B.M. 2008-07-27 Original Revision

Airesurf Networks Confidential Page 1 of 4

Table of Contents
1. SCOPE ............................................................................................................................................................. 3
2. OVERVIEW ....................................................................................................................................................... 3
3. SYSTEM DESIGN ............................................................................................................................................. 3
3.1 WIRELESS ACCESS POINT ............................................................................................................................... 3
3.1.1 Access Point ......................................................................................................................................... 3
3.2 BOOSTER ..................................................................................................................................................... 3
3.2.1 Power supply ........................................................................................................................................ 3
3.2.2 Tx/Rx separation .................................................................................................................................. 4
3.2.3 Transmit Receive Detect ..................................................................................................................... 4
3.2.4 Receive path ........................................................................................................................................ 4
3.2.5 Transmit path ....................................................................................................................................... 4
3.3 ANTENNA...................................................................................................................................................... 4
3.3.1 Receive Antenna .................................................................................................................................. 4
3.3.2 Transmit Antenna ................................................................................................................................ 4

Airesurf Networks Confidential Page 2 of 4

1. SCOPE
The purpose of this system is to split and amplify a WiFi Access Point signal, thus increasing the
effective range and number of users for a single WiFi access point.

2. OVERVIEW
The system is a Wifi Access Point with signal boost in the 802.11b/g topology. The system uses the
D-Link DWL-2200AP device as the signal source for transmit and receive functions of the WiFi signal.
The booster (BSTR-1000) is a single circuit board in a finned heatsink shield box. It has power, Tx/Rx
separation and separate amplifier paths for Tx and Rx. The receive and transmit antenna are both
Omni-directional antenna.

Antennae

Cable B
DWL-2200AP BSTR-1000
192.168.0.50
Ethernet Cable A
PoE Cable C

AC Adapter

3. SYSTEM DESIGN
3.1 Wireless Access Point
3.1.1 Access Point
The access point is a D-Link DWL-2200Ap (FCC: RRK2004042018-1) It may use Power over
Ethernet for its internal power needs or be powered by AC Mains. The output of the AP is
boosted by the BSTR-1000.
3.2 Booster
3.2.1 Power supply
The power supply has a direct 9 volt DC input which is filtered for RF on the power lead.
The voltage regulators are 3.3 at 150ma and 6 at 1 amp fixed voltage.

Airesurf Networks Confidential Page 3 of 4

3.2.2 Tx/Rx separation
The design uses a T/R switch for better signal transfer and lower noise..

3.2.3 Transmit Receive Detect
We use a directional coupler, moving it to the input of the device so the T/R switch operates
correctly, and we also use a signal level detector. The comparator detects signal level, and the other
half of the dual device provides inversion. The comparator operates on 3.3 which is acceptable for
both enables and the T/R switch.

3.2.4 Receive path
The receive path has a 2.45GHz notch filter between stages.

3.2.5 Transmit path
There is an attenuator after the RF switch that reduces the signal from the AP by 13db before the
pre-amp stage. After the pre-amp stage, the signal is delivered to the transmit stage at at gain of
20dBm,

3.3 Antenna
3.3.1 Receive Antenna
The SPK-1000 uses an Omni-directional antenna with an 8dBi gain.

3.3.2 Transmit Antenna
The SPK-1000 uses an Omni-directional antenna with an 8dBi gain.

Airesurf Networks Confidential Page 4 of 4

Document Created: 2008-07-27 23:54:57
Document Modified: 2008-07-27 23:54:57

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