User's Manual

36!
VISIT!BAOFENGTECH.COM!AND!MIKLOR.COM!FOR!DOWNLOADS!AND!HELP!
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UV-25X2!/!UV-25X4!/!UV-50X2!
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3.!Set!the!Menu!20!settings!to!select!when!the!PTTID!is!transmitted.!!
4.!Set!the!Menu!21!settings!to!program!the!PTTID!transmit!delay!time.!!
5.When!all!the!settings!are!set,!when!you!transmit!(Press!the!PTT)!The!radio!will!transmit!the!
PTTID.!
DTMF!RX!Settings!
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This!radio!has!DTMF!coding!and!decoding.!Use!the!PC!software!to!set!the!DTMF!signal!settings!first.!!
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DTMF!TX!Settings!
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In!two-way!radio!systems,!DTMF!is!most!commonly!used!for!automation!systems!and!remote!
control.!A!common!example!would!be!in!amateur!radio!repeaters!where!some!repeaters!are!
activated!by!sending!out!a!DTMF!sequence!(usually!a!simple!single-digit!sequence).!
Table!7.1.!DTMF!frequencies!and!corresponding!codes!
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1209!Hz!
1336!Hz! 1477!Hz! 1633!Hz!
697!Hz! 1! 2! 3!
A!-! !
770!Hz! 4! 5! 6!
B!-! !