Alpha Antenna EMCOMM Operating Manual

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Model – EMCOMM Antenna
Operating Manual, Version 1.6, August 4, 2020
Overview
The Alpha EMCOMM Antenna is for regional HF Digital communications without a tuner from 29.7-3.4MHz. Please email
alphaantenna@gmail.com if you require support.
Site Selection
Place in the center of a clear area with a good conductive ground for best NVIS (Near Vertical Incidence Skywave). NOTE:
An external tuner can be used if your system is installed over a poor conductive ground or not placed in a clear area.
Specifications
Designed to support the MIL-STD-188 M110a digital communications mode, this system is rated at 25 watts continuous
and bursts of 100 watts digital for up to 1 minute using the MIL-STD Data Modem Terminal (MS-DMT) and Automated
Message Terminal (AMT) software applications. Also supports other modes of communication with limited efficiency,
including LSB/USB at 250W PEP, CW at 125W, and FM/AM/Digital at 25W with bursts of 100W digital for up to 1 minute.
Excess RF Exposure Warning
In the United States, the Federal Communications Commission has established guidelines for human exposure to Radio
Frequency (RF) electromagnetic fields. The commission's requirements are detailed in parts 1 & 2 of the FCC's rules and
regulations {47 CFR, 1.1307(b), 1.1310, 22.1091, 2.1093}. It is the responsibility of the owner/operator of this device to
follow all applicable warnings and precautions regarding human exposure to RF fields. Additional references:
http://www.arrl.org/rf-exposure
Signal Pattern
The primary signals are launched at 15 degrees off the horizon in the direction the Counterpoise wire is run and above
the antenna. So, position your system appropriately to achieve your objective.
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