Operation - Viking PA-30 Product Manual

A. Background Music In
This audio input allows background music from an external source to plug into the PA-30. While any other input
is active, background music is turned off, so music will only be heard through the speakers when all other inputs
are idle. A 3.5mm (1/8") audio cable is provided, and the music level can be set using the trim POT just behind
the Background Music input jack.
B. Loud Ringing
1. Line In
This input provides loud ringing through the speakers whenever ringing voltage is detected. Connect an analog
ringing line to screw terminals 13 &14 for this feature.
2. Contact Closure
This input provides loud ringing through the speakers whenever a contact closure is detected. Some phone
systems provide a "common audible" dry contact closure whenever a call is coming in. Wire the contact closure
across screw terminals 15 & 16 to provide loud ringing from the PA-30.
3. Night Transfer
This input can be used to disable loud ringing. For example, if loud ringing is only necessary during off business
hours, an external switch can be added to disable loud ringing during the day, and transfer it back on at night.
Wire an external switch across terminals 16 & 17. When the switch is closed, loud ringing will be disabled.
4. Loud Ringing Sounds
The PA-30 can produce one of 4 selectable loud ringing sounds. Use DIP Switches 3 and 4 to choose between
Electronic Warble, Double Gong, Quadruple Chime, or Door Chime sounds for loud ringing. Select the
Electronic Warble tone (traditional loud ringing) for noisy areas. The softer chime tones work well in less noisy
environments.
C. Paging
1. Page In
This audio input allows paging from a phone system's Paging Port, a phone system's unused Telephone Line
Input (Trunk Port), FXO, or even a simple dedicated analog phone. Wire the appropriate page source to screw
terminals 9 & 10.
If paging from a phone system's unused Telephone Line Input (Trunk Port), FXO, or dedicated analog phone,
DIP Switch 1 must be turned ON so the PA-30 will provide the necessary 40V DC of Talk Battery. To page,
either access that Trunk Port or go off hook on the analog phone. Loop current will be detected and activate
paging. Wait for the Page Alert Tone to pass, and then speak.
If paging from a Paging Port and the Page Contacts are not used, the PA-30 relies on a Voice Activation
Switch (VOX) feature that will switch to paging when voice audio is detected. This means the voice audio
must be loud enough to be detected; in addition, there is not an opportunity for the PA-30 to produce a page
alert tone. The VOX sensitivity can be adjusted using the Page Level Trim Pot located just behind the Page
In screw terminals. Adjust this Pot so the Page LED flashes with page audio. To page, simply access the
phone systems paging port and speak.
If paging from a Paging Port and Page Contacts are used (see below), the PA-30 will provide a Page Alert
Tone. To page, access the phone systems paging port, wait for the Page Alert Tone to pass, and then speak.
2. Page Contacts
Page Contacts are only useful if paging from a phone system's Paging Port (see above). If a Page Contact
Closure is available from the phone system, wire it to screw terminals 11 & 12. A contact closure will activate
the PA-30's Paging Input.
D. Aux In
This audio input allows any additional audio sources to be connected into the PA-30 on screw terminals 7 & 8.
Possible uses are: audio from another paging system, clock controlled tones to announce work shift times (see
Viking model CTG-1), emergency siren (see Viking model MTG-10), digitally recorded announcements (see Viking
model DVA-500A or DVA-2WA), etc.
The PA-30 relies on a Voice Activation Switch (VOX) feature that will switch to the Aux Input when audio is loud
enough to be detected. The VOX sensitivity can be adjusted using the Aux In Level Trim Pot located just behind
the Aux In screw terminals. Adjust this Pot so the Aux In LED flashes with Aux audio.
E. 600 Ohm Output
This audio output is provided so that additional paging amplifiers can be added if additional paging power is
needed. This is a 600 ohm line level output that can be connected into any single ended amplifier input (such
as a second PA-30).

Operation

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