User's Manual

Compliance with RF Exposure Standards:

The DTX two-way radio is designed and tested to comply with a number of national and international

standards and guidelines (listed below) regarding human exposure to radio frequency electromagnetic

energy. This radio complies with the IEEE and ICNIRP exposure limits for general population/uncontrolled

RF exposure environment at duty factors of up to 50% talk and 50% listen and is authorized by the FCC for

occupational use. In terms of measuring RF energy for compliance with the FCC exposure guidelines, your

radio antenna radiates measurable RF energy only while it is transmitting (during talking), not when it is

receiving (listening) or in standby mode. The DTX two-way radio complies with the following RF energy

exposure standards and guidelines:

• United States Federal Communications Commission, Code of Federal Regulations; 47 CFR §§ 2 sub-part

• American National Standards Institute (ANSI) / Institute of Electrical and Electronic Engineers (IEEE)

C95. 1-1992.

• Institute of Electrical and Electronic Engineers (IEEE) C95.1-1999 Edition.

To control exposure to yourself and others and ensure compliance with the occupational/controlled

environment exposure limits always adhere to the following procedures:

Guidelines:

• User awareness instructions should accompany device when transferred to other users.

• Do not use this device if the operational requirements described herein are not met.

Instructions:

• Transmit no more than the rated duty factor of 50% of the time. To transmit (talk or send data), assert the

PTT input pin. To receive calls, un-assert the PTT input. Transmitting 50% of the time, or less, is

important because this radio generates measurable RF energy exposure only when transmitting (in terms of

measuring for standards compliance).

• Transmit only when people are at least the recommended minimum lateral distance away, as shown in

Table 1, from a properly installed according to installation instructions, externally-mounted antenna.

NOTE - Table 1 lists the recommended minimum lateral distance for bystanders in an uncontrolled

environment from transmitting types of antennas (i.e., monopoles over a ground plane, or dipoles) at

several different ranges of rated radio power for mobile radios installed on a vehicle.

Table 1. Rated Power and Recommended Lateral Distance for quarter-wave ground plane antenna:

Rated Power of DTX Recommended Minimum Lateral

2-way Radio Distance from Transmitting Antenna

5 watts or less: 19.2 inches (48.7 cm)

30 to 5 Watts: 35.3 inches (89.6 cm)

Antennas

• Install antennas taking into account the recommended minimum lateral distances in Table 1. These

antenna installation guidelines are limited to antennas with appropriate ground planes. The antenna

installation should additionally be in accordance with:

a.) The requirements of the antenna manufacturer/supplier.

b.) Instructions in this manual including minimum antenna cable lengths.

c.) Antennas other than those shown in Table 1 must be tested with the High Power DTX module

for RF exposure compliance in the environment in which it is to be used per the FCC’s OET

Bulletin 65, Edition 97-01 or Industry Canada RSS-102.