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<br />000270 <br /> <br />, <br />Multi-Prequency VHP Tranamitter. ~AR Alert ayatema arc avail- <br />able in two frequency rangn, VHF and UiF. VHF ayatema, arc provided <br />with a multi-frequency .radio tranamitter utilizing a ayntb,nized radio <br />frequency duign. Por UiF a lingle channel tranamitter is inatalled. <br />Radio transmitters arc mounted on the rever.e aide of t.he 585 Oat. <br />Tran.mitter. \ <br /> <br />When u.ing the 585-7001 VHF Synthesized Radio, only ,~ radio is <br />required for tuning to all as.ignedfrequencin in the Vi'IF,. land for <br />hydro-meteorology data transmisaion. Frequenciea arc act by simply <br />setting a group of switches--no other adjustment. are required. Thus, <br />the VHF Synthesized Radio Tran.mitter reducea 'pare parta requirements <br />in multi-frequency networks by providing a univer.al sub.titute <br />throughout any Alert Network. If radio frequencies eycr need to be <br />changed, due to RF interference for ezample, change. can be made <br />readily, eliminating lengthy delay. due to ordering new radio. with <br />new crystals. A single unit can also be u.ed for radio path analyses <br />for new siting in.tallations. <br /> <br />8 <br />