User's Manual

M7X and M7R Page 1-6 Overview
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Built-In Test
The M7 radio has a comprehensive Built-In Test (BIT) system that continuously monitors key parameters
and reports status information. Should a fault be detected, the BIT screen indicates the faulty module or
component.
The BIT system also detects external environmental conditions that could lead to degraded performance
of the radio, such as high temperature and high VSWR.
The BIT system is described in the Maintenance topic.
Power Supply
All M7 radios operate from a 99 to 264 Vac mains supply, or a low voltage 24/28 Vdc supply. When both
ac and dc input supplies are connected, the radio operates from the ac mains. Should the mains supply
fail, the radio automatically switches to dc operation and then reverts back to ac operation when the
mains supply is restored.
M7 Construction
All M7 radios utilize a common stainless steel chassis assembly that incorporates an ac/dc power supply
and an interconnection system. The design incorporates provision for telescopic slide mounting in
industrial standard 19 inch (483 mm) cabinets, and for free-standing applications.
Various radio modules are installed into the chassis as required by the chosen configuration. Modules
are individually screened to provide maximum EMC immunity. Similar modules are interchangeable and
do not require any alignment or manual adjustment on replacement except for an RF power trim or
frequency trim.
Modules are individually configuration controlled and have electronic serial numbers for simplified
logistics.