DTC Communications VXS250 Video Transmitter User Manual questions 1

DTC Communications Inc. Video Transmitter questions 1

Contents

Corrected manual Appendix A

Appendix A: Using Antennas with the VBS/VBL-250 Video TransmitterBodyworn applications:When the VBS/VBL-250 video transmitter is to be worn on the body, only theDTC VidiWire antenna system should be used. This antenna has been extensively testedand found to be safe when used as directed. The antennas used in the VidiWire systemare clearly labeled as to which side of the antenna should be placed against the body.These directions must be observed to insure safe and effective operation.Non-portable applications:In fixed location applications any suitable antenna may be used. However, toinsure safe operation, it is imperative that proper spacing be maintained between theradiating surface of the antenna and any persons body. The required spacing depends onthe RF output power of the transmitter and the gain of the antenna being used. The chartbelow shows the correct minimum spacing for antennas used with the VBS/VBL-250transmitters. If the gain of the antenna is unknown, contact the manufacturer of theantenna for this information. To insure that proper spacing is maintained, locate thetransmitter or arrange physical barriers in such away that people are prevented fromapproaching too closely.Minimum Allowable Spacing Between the Antenna and the Human Body(VBS/VBL-250 Video Transmitter)05101520253035400 5 10 15 20 25Antenna Gain (dB)Minimum Spacing (inches)

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