Viking 35AE Manuel télécharger pdf (Page 7)

Note 1: Mount the amplifier close to where the speakers are installed to minimize the speaker wire run lengths.

Note 2: Using half the recommended distance or half as many speakers per run will keep the volume lost limited to 3db.

Note 3: Doubling up the wires will allow double the length, or reduce the amount of volume loss.

Note 4: Heavier gauge wire, fewer speakers per run, and shorter runs will all minimize volume loss.

Note 5: Use 70-Volt or 25-Volt speakers in applications that require wire run lengths greater than specified in the chart.

The PA-15 contains a high current amplifier which can drive up to fifteen 8-ohm speakers. The more speakers

that are used, the less shared power each speaker will receive, the softer they will each play. A single speaker

with a short speaker wire run will receive the full 15 watts of power, where if 15 speakers are used, there will be

less then 1 watt of power available for each speaker. See DOD# 895 for additional information on paging horn

volume per number of speakers being used. If additional paging power is needed, add a Viking model PA-60 for

60 more watts of paging power.

Another consideration when budgeting speakers is paging power that is lost in the wire runs. A single speaker on

a short heavy gauge wire will have no loss, but many speakers on a long light gauge wire will have an unacceptable

amount of volume lost. Use the below chart as a guide line to keep the volume lost limited to less then 5db. Using

half the recommended distance or half as many speakers per run will keep the volume lost limited to less then

3db.

E. Speakers

F. Managing Power Losses

#16

#18

#20

#22

#24

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2,000'

1,250'

800'

500'

315'

1,000'

625'

400'

250'

155'

665'

420'

265'

165'

105'

500'

315'

200'

125'

80'

400'

250'

160'

100'

60'

330'

210'

130'

80'

50'

250'

155'

100'

60'

40'

200'

125'

80'

50'

30'

165'

105'

65'

40'

25'

135'

85'

50'

35'

20'

Wire Gauge Size

Number of 8 Ohm Speakers on a Wire Run

Sound Output Specifications

All tones require a minimum of 180mS of ringing voltage (or 50mS contact closure) to trigger. Once triggered, the

loud ringing sound selected by DIP switches 1 & 2 will be created as per the chart below and on page 8. The ringing

must stop or the contacts must open for at least 50mS before the PA-15 can produce another loud ringing sound.

A. Electronic Warble (Traditional Loud Ringer)

2 seconds

Frequency alternates between 1440 Hz and

1140 Hz 20 times per second.

Off

575 Hz

B. Double Gong (Two “Gong” Tones)

575 Hz

2.2 sec

0.74

sec

Off

Maximum recommended length (in feet) for the number of 8 Ohm speakers on a wire pair to maintain a volume

loss of less than 5dB.

1 2 3 4 5 6 7 8

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Viking 35AE Manuel Page 7

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