Federal!Signal!UltraVoice!Remote!Interface!(UVRI)!
Installation,!Operation,!and!Service!Manual!
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PRE9OPERATION!CHECK9OUT!AND!TEST!
47!
8.3! Radio!Transceiver!Adjustment!Procedure!!
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Note:'This'procedure'previously'completed'at'factory.'Only'readjust'if'radio'reDalignment'
is'required'or'if'the'radio'is'being'installed'in'the'field.'
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A.!Qualifications:
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Requires!a!properly!trained!Radio!Technician.!
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B.!Equipment!Required:!
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1.! Service!Monitor!
2.! Oscilloscope!
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C.!Setup:!!
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Connect!the!radio!to!the!service!monitor.!
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D.!Receive!Audio!Adjustment!
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1.!Using!service!monitor,!modulate!the!correct!RF!signal!into!the!receiver!with!a!1!kHz!
tone!at!3!kHz!deviation.!If!bandwidth!is!12.5,!then!modulate!at!1.5!kHz!deviation.!(If!using!
private!line,!add!0.75!kHz!private!line!deviation!to!the!signal.)!
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2.! Adjust! the! level! at! TP16! (2005698! controller! card)! for! 1V
p9p
! using! the! REC! gain!
adjustment!R105!(2005698!controller!card!front!panel).!
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E
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Transmit!Deviation!Adjustment!
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1.! Simultaneously!press!buttons!5!&!7!on!the!2005698!controller!card.!This!will!cause!
the!controller!to!transmit!for!approximately!8!seconds.!
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2.! Measure!the!deviation!level!using!service!monitor.!!
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3.! Adjust!the!TX!level!(2005698!controller!card!front!panel)!for!3!kHz!deviation.!If!the!
bandwidth!is!12.5!kHz,!then!adjust!for!1.5!kHz!deviation!(If!using!private!line,!add!0.75!
kHz!private!line!deviation!to!the!signal.)!!!
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Note,'slightly'higher'S/N'levels'can'be'obtained'by'increasing'the'RF'modulation'levels'
to'4'and'2'kHz'depending'on'the'channel'spacing'and'the'ability'of'the'radio'to'produce'
a'clean'sinewave'at'these'levels'without'limiting.'Do'not'exceed'these'deviation'levels.'
All'sites'in'the'system'should'be'set'to'the'same'modulation'level.'
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