User Manual

CELLTECH RESEARCH INC. Test Report S/N: 092601-169ARU

1955 Moss Court, Kelowna Date of Tests: October 16, 2001

B.C. Canada V1Y 9L3 FCC SAR Evaluation

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Portable VHF PTT Radio Transceiver (150-174MHz)

3.0 SAR MEASUREMENT SYSTEM

Celltech Research SAR measurement facility utilizes the Dosimetric Assessment System (DASY™)

manufactured by Schmid & Partner Engineering AG (SPEAG™) of Zurich, Switzerland. The

DASY system is comprised of the robot controller, computer, near-field probe, probe alignment

sensor, and the SAM phantom containing brain or body equivalent material. The robot is a six-axis

industrial robot performing precise movements to position the probe to the location (points) of

maximum electromagnetic field (EMF). A cell controller system contains the power supply, robot

controller, teach pendant (Joystick), and remote control, is used to drive the robot motors. The

Staubli robot is connected to the cell controller to allow software manipulation of the robot. A data

acquisition electronic (DAE) circuit performs the signal amplification, signal multiplexing, AD-

conversion, offset measurements, mechanical surface detection, collision detection, etc. is connected

to the Electro-optical coupler (EOC). The EOC performs the conversion from the optical into digital

electric signal of the DAE and transfers data to the PC plug-in card. The DAE3 utilizes a highly

sensitive electrometer-grade preamplifier with auto-zeroing, a channel and gain-switching

multiplexer, a fast 16-bit AD-converter and a command decoder and control logic unit.

Transmission to the PC-card is accomplished through an optical downlink for data and status

information and an optical uplink for commands and clock lines. The mechanical probe-mounting

device includes two different sensor systems for frontal and sidewise probe contacts. They are also

used for mechanical surface detection and probe collision detection. The robot uses its own controller

with a built in VME-bus computer.

DASY3 SAR Measurement System with SAM phantom