Radio Shack 20-164 ユーザーズマニュアル
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If.you.set.the.squelch.precisely.at.the.threshold.
where.the.hissing.sound.stops,.the.scanner.
may.pick.up.unwanted,.partial,.or.very.weak.
transmissions..To.prevent.this,.most.users.
prefer.a.position.a.bit.past.the.threshold.
where.the.hissing.sound.stops,.the.scanner.
may.pick.up.unwanted,.partial,.or.very.weak.
transmissions..To.prevent.this,.most.users.
prefer.a.position.a.bit.past.the.threshold.
With.the.attenuator.on,.the.scanner.might.
not.receive.weak.signals..You.can.reduce.
interference.using.two.attenuator.modes:.
not.receive.weak.signals..You.can.reduce.
interference.using.two.attenuator.modes:.
•. Global.–.(Default).The.attenuator.setting.is.
applied.to.all.channels,.bands,.or.groups..
•. Normal.–.Lets.you.set.the.attenuator.in.
each.channel,.band,.or.group..
To set squelch:
1.. Turn.off.the.scanner.and.turn.SQUELCH.
1.. Turn.off.the.scanner.and.turn.SQUELCH.
fully.counterclockwise.
2.. Turn.on.the.scanner..You.should.hear.a.
hissing.sound.
3.. Turn.the.SQUELCH.clockwise.to.
decrease.the.scanner’s.sensitivity,.turn.
counterclockwise.to.increase.its.sensitivity.
counterclockwise.to.increase.its.sensitivity.
To set the attenuator mode:
1.. To.set.Global.mode,.press.FUNC.and.then.
1.. To.set.Global.mode,.press.FUNC.and.then.
ATT..On.the.display.“G”.appears.”.
2.. To.set.the.attenuator.for.each.channel,.press.
FUNC.and.then.ATT..On.the.display.“G”.
disappears..To.turn.the.attenuator.on.or.off.
for.each.channel:
disappears..To.turn.the.attenuator.on.or.off.
for.each.channel:
•. On.–.Press.ATT..“A”.appears..
•. Off.–.Press.ATT.again..“A”.disappears.”
•. Off.–.Press.ATT.again..“A”.disappears.”
You cannot set the attenuator while
scanning.
scanning.
Delay
Some.conversations.might.take.several.seconds.
between.transmissions..To.avoid.missing.a.
reply,.a.delay.is.automatically.set.for.each.
channel..The.scanner.stops.for.2.seconds.after.
a.transmission.stops.before.it.resumes.scanning.
or.searching..
between.transmissions..To.avoid.missing.a.
reply,.a.delay.is.automatically.set.for.each.
channel..The.scanner.stops.for.2.seconds.after.
a.transmission.stops.before.it.resumes.scanning.
or.searching..
To turn the delay on / off:
1.. Press../DELAY..DLY.appears.if.the.delay.is.
1.. Press../DELAY..DLY.appears.if.the.delay.is.
on..
2.. To.turn.on.the.delay,.press../DELAY.again..
“dly”.appears.if.the.delay.is.off.
Scanner Setup
A.
frequency,.expressed.in.kHz.or.MHz,.is.the.
tuning.location.of.a.station..
Your.scanner.saves.frequencies.to.
channels.and.
groups.the.channels.into.banks..The.scanner’s.
10.
10.
banks.each.hold.100.channels.(1,000.
channels.total).
The.scanner.is.preset.to.the.most.common.AM.
or.FM.receive.modes.for.each.frequency.range..
However,.some.amateur.transmissions.may.
operate.in.a.different.mode..If.the.transmission.
sounds.weak.or.distorted,.you.may.have.the.
channel.set.to.the.wrong.
or.FM.receive.modes.for.each.frequency.range..
However,.some.amateur.transmissions.may.
operate.in.a.different.mode..If.the.transmission.
sounds.weak.or.distorted,.you.may.have.the.
channel.set.to.the.wrong.
receive mode:
AM – Amplitude.Modulation,.primarily.used.
for.aircraft,.military,.some.amateur.and.
government.transmissions.
government.transmissions.
FM – Frequency.Modulation,.used.for.
most.public.safety.transmissions,.
broadcast,.business,.and.amateur.radio.
transmissions.
broadcast,.business,.and.amateur.radio.
transmissions.