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RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-8461-MDS-UP-SD9-MS2ES-Upgrade-Key-SD9-MS-to-SD9-ES.aspx
Antenna SWR Check
Before placing the radio into final service, a check should be made of
the antenna system's standing wave ratio (SWR). Use a directional watt-
meter suited to the frequency of operation for this check. High SWR
(above 2:1) may indicate an antenna, connector, or feedline problem,
and should be corrected.
SD Series Technical Manual
MDS 05-4846A01, Rev. D