E designates the maximum power level:
3=3 watts
6=6 watts
9=10 watts
F designates whether the control/loader board has a regulator and if so, at what current level:
D=no regulator; the unit must operate from external, reg7.5 VDC and is limited to either 3
or 6 watts max.
L=low current regulator; the power module is not regulated. Used for 10 watt version only.
I=high current regulator; the unit operates from 10-15 volts at either 3 or 6 watts max.
Example: A DTX-454-OBN6I would be a UHF module for operation between 450 and 470 MHz with a
BNC RF connector, narrow (12.5 kHz channel bandwidth) IF bandwidth, 6 watts maximum output power,
and an internal regulator to allow operation from 10 to 15 volts.
The part number system for a stand-alone RF board is the same as that for a module except that “F”
designator (regulator option) does not exist and a “-DD” is appended at the end.
1.3
FCC REGULATIONS
1.3.1
LICENSING
For those frequency bands governed by FCC rules, the FCC requires that the radio owner obtain a station
license for his radio before using the equipment to transmit, but does not require an operating license or
permit. The station licensee is responsible for proper operation and maintenance of his radio equipment,
and for ensuring that transmitter power, frequency and deviation are within the limits specified by the
station license. This includes checking the transmitter frequency and deviation periodically using
appropriate methods. Note also, that wideband operation (25/30 kHz channel bandwidth) may not be
permitted.
1.3.2
PRODUCT CERTIFICATION
The DTX modules are certified by the FCC for operation in the United States and by Industry Canada for
operation in Canada on certain frequency bands and sub-bands for transmission of either voice or data
signals when aligned according to the alignment procedure for the proper bandwidth and when operated as
a complete unit in the metal case. Operation of the RF board as a stand-alone unit or in combination with
any other equipment, in any mode outside the alignment procedure, or with the clipper filter electronically
disabled will require the filing of a new type acceptance application with the FCC by the user.
1.3.3
SAFETY STANDARDS-RF EXPOSURE
RF ENERGY EXPOSURE AWARENESS AND CONTROL INFORMATION, AND OPERATIONAL
INSTRUCTIONS FOR FCC OCCUPATIONAL USE REQUIREMENTS:
BEFORE USING THIS 2-WAY RADIO, READ THIS IMPORTANT RF ENERGY AWARENESS AND
CONTROL INFORMATION AND OPERATIONAL INSTRUCTIONS TO ENSURE COMPLIANCE
WITH THE FCC’S AND IC’S RF EXPOSURE GUIDELINES.
NOTICE: This radio is intended for use in occupational/controlled conditions, where users have full
knowledge of their exposure and can exercise control over their exposure to meet FCC/IC limits. This radio
device is NOT authorized for general population, consumer, or any other use.
