Maritime & Aviation: EMC & FCC Testing

Green Mountain Electromagnetics, Inc. is an EMC and Radio test laboratory. For 25 years, GME has been offering electronic-product manufacturers compliance testing to CE, FCC and military standards.

A photo of a screen readout of an EMC test at the GME Vermont lab

At GME, we offer quality testing alongside personalized service, creating positive long-term relationships with clients. Careful time and attention is taken to work with customers that experience Electromagnetic Interference in products.

GME is Accredited by A2LA to ANS/ISO/IEC 17025 for the Following Equipment and Tests:

Automatic Identification Systems (AIS) provide continuous RF-signal and -data transmission for ship identification using TDMA/DSC transmitters and TDMA/DSC/GPS receivers. GME can test the performance of these transmitters and receivers.

Applicable standards are IEC 61993-2, IEC 62320-1, IEC 62320-2, IEC 62287-1 for Class A/B AIS, AtoN, and Base Stations.

A GME lab tech uses equipment to perform maritime EMC testing and aviation EMC testing at the GME lab in Vermont

EMC Testing

Tests performed include verification of Operational and Performance Requirements, EMC Tests, Identification and Operating Modes, and Autonomous Mode.

All performance checks are also in accordance with the Test Plan designed by GME with the customer. The table below gives a detailed list of tests performed.

A photo of a GME tech peforming maritime FCC testing and aviation FCC testing at the Vermont lab

FCC Part 80 and 87

GME also provides accredited testing for Licensed Maritime and Aviation Radio Service for FCC Part 80 and 87 approvals using ANSI/TIA-603-D. VHF-radio and -navigation equipment approvals are handled quickly.

Additionally GME methods and equipment are in accordance with International Standard IEC 60945 Ed. 4, "Maritime Navigation and Radiocommunication Equipment and Systems – General Requirements – Methods of Testing and Required Test Results (August 2002 w/A1:2008)" Paragraph 9, "Electromagnetic Emissions – Methods of Testing and Required Test Results," and Paragraph 10, "Immunity to Electromagnetic Environment – Methods of Testing and Required Test Results."

Below Is a Detailed List of AIS Performance Tests: 

Frequency Error TDMA Transmit 15.1.1 ±500 Hz 156,025,000 Hz
162,025,000 Hz
Carrier Power TDMA Transmit 15.1.2 ±1.5 dB 41 dBm F156
41 dBm F162
30 dBm F156
30 dBm F162
Transmission Spectrum TDMA Transmit 15.1.3 61993-2 Fig.6 Emissions Mask
F156 & F162
Modulation Accuracy TDMA Transmit 15.1.4 ±175 Hz
±240 Hz
±175 Hz
±240 Hz
1740 Hz TS2 F156
2400 Hz TS3 F156
1740 Hz TS2 F162
2400 Hz TS3 F162
Output Power Characteristics TDMA Transmit 15.1.5 61993-2 Fig.2 Power vs. Time
F156 & F162
Sensitivity TDMA Receive 15.2.1 -107 dBm/-104 dBm <20% PER F156
<20% PER F162
Error at High Input TDMA Receive 15.2.2 -7 dBm
-77 dBm
<1.0% PER
Co-channel Rejection TDMA Receive 15.2.3 -10 dB <20% PER F156
<20% PER F162
Adjacent Channel Selectivity TDMA Receive 15.2.4 >70 dB <20% PER F156
<20% PER F162
Spurious Rejection TDMA Receive 15.2.5 >70 dB <20% PER

Intermodulation Rejection & Blocking

TDMA Receive 15.2.6 Table 23 <20% PER F156
<20% PER F162
Switching Time TDMA Receive 15.2.7 -107 dBm <20% PER F156
<20% PER F162
Out-of-Band Energy TDMA Receive 15.2.8 -5 dBm <20% PER F156
<20% PER F162
Conducted Spurious TDMA Receive 15.3.1 9 kHz - 4 GHz -36 dBm <1 GHz
-30 dBm >1 GHz
Conducted Spurious TDMA Receive 15.3.2 9 kHz - 4 GHz -57 dBm <1 GHz
-47 dBm >1 GHz