Viking PA-30 Instructions for use

P
Pr ra ac ct ti ic ce e
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EL LE EC CO OM MS
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EN NT TU UR RY Y
TECHNICAL
TECHNICAL
P
PA-30 A-30
30 Watt Paging Amp
with Loud Ringing
August 8, 2006
The PA-30 can directly drive up to thirty (30) 8 ohm
paging speakers or fifty (50) 70 volt paging speakers.
The PA-30 provides loud ringing and paging to elec-
tronic key systems, 1A2 Key systems, PABX’s as well
as No-KSU phones and multi-line phones.
Paging is accomplished by connecting the PA-30 to a
paging port or unused telephone line input (trunk port)
of nearly any phone system.
The PA-30 will also generate adjustable loud ringing
from a ringing analog line or from a dry contact clo-
sure. Either a loud electronic warble, or one of three
other soft chime sounds may be selected. An external “night transfer” switch can be added to
turn loud ringing on or off in night bell applications.
The PA-30 is easy to install and eliminates the installation of multiple bells, relays and paging
cards. The unit comes complete with a power supply, and integrated 30 watt amplifier.
Add Paging and Loud Ringing with
Background Music to Any Phone System
P
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• 30 Watts of paging power
• Drive up to (30) 8 ohm speakers
• 70V output can drive up to (50) 70V speakers
• Master volume control
• Separate volume controls for Auxiliary Input,
Paging, Ringing Tones and Background Music
• Choose from up to 4 ringing sounds:
- Electronic warble (traditional loud ringer)
- Double gong (two identical “gong” tones)
- Quadruple chime (four descending chime tones)
- Door chime (ding-dong)
• Provides loud ringing or night bell
• Night transfer switch
• Page from an unused trunk port or paging port
• Can provide background music from an external
source
• Use as a low cost stand alone power amplifier
• 600 Ohm output to drive additional amplifiers
• Use multiple units for more paging power
• Amplified loud paging
• Loud ringing
• Night bell
• Background music
Power: 120V AC/15V AC 2.2A UL listed adapter provided
Dimensions: 133mm x 89mm x 44mm (5.25” x 3.5” x 1.75”)
Shipping Weight: 1.36 kg (3 lbs)
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95%
non-condensing humidity
Paging Output: 30 watts - powers up to (30) 8 ohm speakers or
(50) 70V speakers
Talk Battery: 40V DC
Connections: (1) 3.5mm (1/8") audio jack, (1) 17 position screw
terminal block
A
Ap pp pl li ic ca at ti io on ns s
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Fe ea at tu ur re es sO Ov ve er rv vi ie ew w
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAGE
CONTACT
RINGING
LINE CC NT
LED Indicators
Loud Ringing Activated
Page Contact Activated
Page In Audio Level
Aux In Audio Level
Power
Volume Controls
Aux Input
Paging
Ringing / Alert Tone
Background Music
Power Input (15VAC
Adapter Included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PA GE IN PA GE
CONTACT
RINGING
LINE CC NT
Master Volume
Control
DIP Switches
(see section G)
Speaker Output
Up to (30) 8 Ohm speakers
or (50) 70V speakers
600 Ohm Output
Connect to additional amp-
lifiers to drive more speakers
Aux In
Audio Input
Paging Input
Paging Contact
Contact Closure - To trigger loud ringing
Night Transfer - To enable/disable loud ringing
Background Music In - Connect to any
music source to provide background music
Line In - A ringing line will trigger loud ringing.
2
W
Wa ar rr ra an nt ty y
IF YOU HAVE A PROBLEM WITH A VIKING PRODUCT, PLEASE CONTACT: VIKING TECHNICAL SUPPORT AT [phone]
Our Technical Support Department is available for assistance Monday 8am - 4pm and Tuesday - Friday 8am - 5pm central time. So that we can give you better service, before you call please:
1. Know the model number, the serial number and what software version you have (see serial label).
2. Have your Technical Practice in front of you.
3. It is best if you are on site.
RETURNING PRODUCT FOR EXCHANGE
The following procedure is for equipment that has failed out-of-box (within 10 days of purchase):
1. Customer must contact Viking’sTechnical Support at 715-386-8666 to determine possible causes for the problem. The customer MUST be able to step through recommended tests for diagnosis.
2. If the Technical Support Product Specialist determines that the equipment is defective based on the customer's input and troubleshooting, a Return Authorization (R.A.) number will be issued. This number is valid
for fourteen (14) calendar days from the date of issue.
3. After obtaining the R.A. number, return the approved equipment to your distributor, referencing the R.A. number. Your distributor will then replace the product over the counter at no charge.The distributor will
then return the product to Viking using the same R.A. number.
4. The distributor will NOT exchange this product without first obtaining the R.A. number from you. If you haven't followed the steps listed in 1, 2 and 3, be aware that you will have to pay a
restocking charge.
RETURNING PRODUCT FOR REPAIR
The following procedure is for equipment that needs repair:
1. Customer must contact Viking's Technical Support Department at 715-386-8666 to obtain a ReturnAuthorization (RA) number. The customer MUSThave a complete description of the problem, with all pertinent
information regarding the defect, such as options set, conditions, symptoms, methods to duplicate problem, frequency of failure, etc.
2. Packing: Return equipment in original box or in proper packing so that damage will not occur while in transit. Static sensitive equipment such as a circuit board should be in an anti-static bag, sandwiched between
foam and individually boxed.All equipment should be wrapped to avoid packing material lodging in or sticking to the equipment. IncludeALLparts of the equipment. C.O.D. or freight collect shipments cannot be
accepted. Ship cartons prepaid to: Viking Electronics, 1531 Industrial Street, Hudson, WI 54016
3. Return shipping address: Be sure to include your return shipping address inside the box. We cannot ship to a PO Box.
4. RAnumber on carton: In large printing, write the R.A. number on the outside of each carton being returned.
LIMITED WARRANTY
Viking warrants its products to be free from defects in the workmanship or materials, under normal use and service, for a period of one year from the date of purchase from any authorized Viking distributor or 18 months from the date manu-
factured, which ever is greater. If at any time during the warranty period, the product is deemed defective or malfunctions, return the product to Viking Electronics, Inc., 1531 Industrial Street, Hudson, WI., 54016. Customer must contact Viking's
Technical Support Department at 715-386-8666 to obtain a ReturnAuthorization (R.A.) number.
This warranty does not cover any damage to the product due to lightning, over voltage, under voltage, accident, misuse, abuse, negligence or any damage caused by use of the product by the purchaser or others.
NO OTHER WARRANTIES. VIKING MAKES NO WARRANTIES RELATING TO ITS PRODUCTS OTHER THAN AS DESCRIBED ABOVEAND DISCLAIMSANY EXPRESS OR IMPLIED WARRANTIES OR MERCHANTABILITY OR FIT-
NESS FORANY PARTICULAR PURPOSE.
EXCLUSION OF CONSEQUENTIAL DAMAGES. VIKING SHALLNOT, UNDER ANY CIRCUMSTANCES, BE LIABLE TO PURCHASER, OR ANY OTHER PARTY, FOR CONSEQUENTIAL, INCIDENTAL, SPECIALOR EXEMPLARY DAM-
AGESARISING OUT OF OR RELATEDTO THE SALE OR USE OF THE PRODUCT SOLD HEREUNDER.
EXCLUSIVE REMEDYAND LIMITATION OF LIABILITY. WHETHER INANACTION BASED ON CONTRACT, TORT (INCLUDING NEGLIGENCE OR STRICT LIABILITY) ORANYOTHER LEGALTHEORY, ANY LIABILITYOF VIKING SHALL
BE LIMITED TO REPAIR OR REPLACEMENTOF THE PRODUCT, ORATVIKING'S OPTION, REFUND OF THE PURCHASE PRICE ASTHE EXCLUSIVE REMEDY ANDANY LIABILITY OF VIKING SHALLBE SO LIMITED.
IT IS EXPRESSLY UNDERSTOODAND AGREED THATEACH AND EVERY PROVISION OFTHIS AGREEMENT WHICH PROVIDES FOR DISCLAIMER OF WARRANTIES, EXCLUSION OF CONSEQUENTIAL DAMAGES,AND EXCLU-
SIVE REMEDYAND LIMITATION OF LIABILITY, ARE SEVERABLE FROMANY OTHER PROVISIONAND EACH PROVISION ISASEPARABLEAND INDEPENDENT ELEMENT OF RISKALLOCATIONAND IS INTENDED TO BE ENFORCED
AS SUCH.

Up to (15)
8 Ohm Speakers
(not included)
Page Contact
Closure
(if available)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAGE
CONTACT
RINGING
LINE CC NT
Paging Port
Up to (15) more
8 Ohm Speakers
(not included)
Page LED
Indicator
Page Level
Trim Pot
1
ON
OFF
B. Loud Ringing/Night Bell
A. Amplified Loud Paging
Up to (15)
8 Ohm Speakers
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAGE
CONTACT
RINGING
LINE CC NT
Up to (15) more
8 Ohm Speakers
(not included) Unused Telephone
Line Input (Trunk Port)
Page LED
Indicator
Page Level
Trim Pot
1
ON
ON
- OR -
Analog
Phone
1. Paging Port
2. Trunk/Line Port
1. Ringing Analog Lines
Step 1. Move the TALK BATTERY DIP switch to the
OFF position (DIP switch 1).
Step 2. Connect pins 9 and 10 to the paging port output.
Step 3. Connect pins 11 and 12 to the paging contacts
(if available).
Step 4. Adjust the page level trim pot so the Page LED
flashes with page audio.
Note: For information on speakers to use,
ambient noise levels and speaker wiring,
see Fax Back Document 498.
Important: Page Alert Tone is not given
when page contacts are not provided.
Note: For information on speakers to use,
ambient noise levels and speaker wiring,
see Fax Back Document 498.
Step 1. Move the TALK BATTERY DIP switch to the ON
position (DIP switch 1).
Step 2. Connect pins 9and 10 to an unused telephone
line input (trunk port).
Step 3. Adjust the page level trim pot so the page LED
flashes with page audio.
Up to (15)
8 Ohm Speakers
(not included)
Optional Night Transfer
Switch - Disables loud
ringing when closed
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAGE
CONTACT
RINGING
LINE CC NT
Up to (15) more
8 Ohm Speakers
(not included)
Loud Ringing
LED Indicato
r
Loud Ringing
Trim Pot
Ringing Line or
PABX Station
Note: For information on speakers to
use, ambient noise levels and speaker
wiring, see Fax Back Document 498.
Step 1. Connect pins 13 and 14 to a ringing line or
PABX station.
Step 2. The loud ringing pot may be adjusted to set
volume.
Step 3. A night transfer switch may be added to pins 16
and 17 to enable and disable loud ringing.
I
In ns st ta al ll la at ti io on na an nd dP Pr ro og gr ra am mm mi in ng g
3

Up to (15)
8 Ohm Speakers
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAG E
CONTACT
RINGING
LINE CC NT
Up to (15) more
8 Ohm Speakers
(not included)
Background Music
Source (not included)
Background
Music
Trim Pot
2. Dry Contact (Common Audible) Closure (contacts not included)
Up to (15)
8 Ohm Speakers
(not included) Optional Night Transfe
r
Switch - Disables loud
ringing when closed
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAG E
CONTACT
RINGING
LINE CC NT
Up to (15) more
8 Ohm Speakers
(not included)
Dry Contact Closure
(not included)
Step 1. Connect the dry contact closure to pins
15 and 16.
Step 2. A dry contact closure will initiate loud
ringing.
Note: For information on speakers to use, ambient
noise levels and speaker wiring, see Fax Back
Document 498.
C. Auxiliary Input
Up to (15)
8 Ohm Speakers
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAG E
CONTACT
RINGING
LINE CC NT
Up to (15) more
8 Ohm Speakers
(not included)
Audio Source
Aux In LED
Indicator
Aux In Level
Trim Pot
Note: For information on speakers to use, ambient noise lev-
els and speaker wiring, see Fax Back Document 498.
Step 1. Connect pins 7and 8to any other line level
audio source.
Step 2. Adjust the aux in level trim pot so the aux in LED
flashes with aux audio.
D. Background Music
Note: For information on speakers to use, ambient noise levels
and speaker wiring, see Fax Back Document 498.
4
Step 1. Connect a background music source to the background
music in jack using the 1/8” (3.5mm) cable provided.
Step 2. Adjust the background music trim pot to the desired
volume.
Step 3. Background music will play when all other inputs are
idle.

E. Additional Paging Power
Up to (15)
8 Ohm Speakers
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAGE CONTACT
RINGING
LINE CC NT
Up to (15) more
8 Ohm Speakers
(not included)
Up to (15)
8 Ohm Speakers
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAGE CONTACT
RINGING
LINE CC NT
Up to (15) more
8 Ohm Speakers
(not included)
Main PA-30 Second PA-30
Step 1. Connect the main PA-30 as described on previous pages.
Step 2. Move the talk battery DIP switch to the OFF position (DIP switch 1)
Step 3. Connect the main PA-30 600 Ohm Output (pins 5and 6) to a second PA-30 Page In (pins 9and 10).
Step 4. Add a jumper wire across the Page Contact (pins 11 and 12) of the second PA-30.
When more than (30) 8 ohm speakers are required, an additional PA-30 can be added.
F. 70 Volt Speakers
Up to (50) 70V
Speakers
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAG E IN PAG E
CONTACT
RINGING
LINE CC NT
Note: For information on speakers to use, ambient noise levels
and speaker wiring, see Fax Back Document 498.
Step 1. Connect pins 1 and 4 to the 70 volt speakers.
Step 2. For increased volume levels change the
speaker’s “tap” to a higher power level.
Note: For information on speak-
ers to use, ambient noise levels
and speaker wiring, see Fax
Back Document 498.
G. Very Loud Paging
One or two 8 Ohm
Speakers
(not included)
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAG E IN PAG E
CONTACT
RINGING
LINE CC NT
If very loud paging is required, one or two 8-Ohm speakers
can be connected in a way that provides 6dB of additional
speaker volume.
Connect one or two 8-Ohm speakers to pins 1 and 4.
Note: For information on speakers to use, ambient noise levels and
speaker wiring, see Fax Back Document 498.
5

H. DIP Switch Programming
DIP Switches are shown
in factory default settings
C
LED5
C
LED3
C
LED4
C
LED2
C
LED1
123
on
4
30 WATT TELECOM
PAGING AMPLIFIER
VIKING©MODEL PA-30
PWR 15 VAC
123456
SPKRS SPKRS
600 OHM OUTPUT
789101112
AUX IN PAGE IN
PAGE CONTACT
13 14 15 16 17
LINE IN CONTACT CLOSURE
BACKGROUND MUSIC IN
NIGHT TRANSFER
VIKING
ELECTRONICS
HUDSON, WI 54016
MASTER
VOLUME
MIN MAX
LOUD RINGING
70V OUT
+ SPKR - + SPKR -
70V OUT
600 OHM
OUTPUT AUX IN PAGE IN PAGE
CONTACT
RINGING
LINE CC NT
123
ON
4
ON
OFF
Switch 3
OFF
OFF
ON
ON
Switch 4
OFF
ON
OFF
ON
Sound Output Description
Electronic Warble
Double Gong
Quadruple Chime
Door Chime
Switch
1
1
2
2
Position
OFF
ON
OFF
ON
Description
Talk Battery disabled (use for
paging port)
Talk Battery enabled (use for trunk
input)
Normal Priority: Aux In →→Page →→
Ringing →→Background Music
Alternative Priority: Page →→Aux In
→→Ringing →→Background Music
575 Hz
B. Double Gong (Two “Gong” Tones)
S
So ou un nd dO Ou ut tp pu ut tS Sp pe ec ci if fi ic ca at ti io on ns s
575 Hz
2.2 sec
0.74
sec
D. Door Chime (Ding-Dong)
C. Quadruple Chime (Four Descending Chime Tones)
A. Electronic Warble (Traditional Loud Ringer)
Duration of Contact Closure
Frequency alternates between 1440 Hz and 1140 Hz 20 times per second.
0.36
sec 0.36
sec 0.36 sec 2.2 sec
888 Hz 699 Hz 584 Hz 492 Hz
On
Off
On
Off
On
Off
On
Off
0.36
sec
794 Hz 526 Hz
2.7
sec
All tones require a minimum of 180ms of ringing voltage (or contact closure) to trigger. Once triggered, the electronic war-
ble will run continuously until ringing stops (or contacts open). All other tones (double gong, quadruple chime, doorbell) will
run through their full sequence once and will not cycle again until the ringing stops (or contact opens) for at least 50ms and
a second ring signal (or contact closure) triggers them again.
6

O
Op pe er ra at ti io on n
This audio input allows background music from an external source to plug into the PA-30. While any other input is active, back-
ground 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.
A. Background Music 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.
B. Loud Ringing
1. Line In
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.
2. Contact Closure
This input can be used to disable loud ringing. For example, if loud ringing is only necessary during off business hours, an exter-
nal switch can be added to disable loud ringing during the day, and transfer it back on at night. Wire an external switch across
screw terminals 16 & 17. When the switch is closed, loud ringing will be disabled.
3. Night Transfer
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.
4. Loud Ringing Sounds
This audio input allows paging from a phone system’s Paging Port, a phone system’s unused Telephone Line Input (Trunk Port),
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), 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 addi-
tion, 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, sim-
ply access the phone systems paging port, wait for the Page Alert Tone to pass, and then speak.
C. Paging
1. Page In
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.
2. Page Contacts
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 theAux Input when audio is loud enough to be detect-
ed. 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.
D. Aux In
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).
E. 600 Ohm Output
A mater volume control is provided. This adjustment only affects the gain of the PA-30’s output amplifier. Use it to set the
power level going to the speakers.
F. Master Volume
7

Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking Electronics, and its affiliates and/or
subsidiaries assume no responsibility for errors and omissions contained in this information. Revisions of this document or new editions of it may be issued to incorporate
such changes.
Fax Back Doc 489
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Printed in the U.S.A.
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Since there are multiple uses and inputs to the PA-30, priorities need to be established to prevent contentions. If two inputs are acti-
vated at the same time, the one with the highest priority will take effect. Examples: Paging is higher priority then Loud Ringing, so
Paging would interrupt loud ringing tones. Background Music input is always the lowest priority, and thus can be interrupted by any
other input. Two different DIP Switch programmable Priority selections are available as listed below.
G. Priorities
Normal Priority (DIP Switch 2 OFF)
1. Aux In
2. Paging
3. Ringing
4. Background Music
Alternative Priority (DIP Switch 2 ON)
1. Paging
2. Aux In
3. Ringing
4. Background Music
The PA-30 contains two separate high current amplifiers, each of which can drive up to fifteen 8-ohm speakers. This means the
PA-30 is capable of driving a total of thirty 8-ohm speakers. For best results, connect ½ of the speakers across screw terminals
1 & 2 (the first amplifier), and connect the other ½ of the speakers across screw terminals 3 & 4 (the second amplifier), to bal-
ance out the power handling.
H. Speakers
1. Typical 8-Ohm Speakers
An important part of installing any paging system is to understand how amplifier power is lost, and then know how to take meas-
ure to reduce this loss if needed. For example, if eight 8-ohm speakers are all connected together, their combined parallel imped-
ance would be 1 ohm (8 ohms divided by 8 speakers equals 1 ohm). If these eight speakers are wired 125 feet away from the
PA-30 using #16 gauge wire, ½ of the paging power would be lost in the long run. This is because a 125 foot full loop of #16
wire contains 1 ohm of total resistance, so half the power would be lost in the wire, and ½ the power would be produced across
the speakers. For reference, ½ power is a 3dB loss.
There may be enough amplifier “headroom” for this to be acceptable in most applications, but in applications in which this much
power loss is not acceptable, some measures can be taken to get some additional power to the distant speakers as listed below:
1. Use heavier gauge wire. Every 3 gauge sizes heavier represents ½ the resistance.
2. Double-up on the existing gauge wire.
3. Have more wire runs and fewer speakers in parallel for each run. Each speaker wired on its own “homerun” would
maximize this approach.
4. Install the PA-30 closer to where the speakers are installed to minimize the wire run lengths.
5. Use 70 volt speakers as described below.
2. Managing Power Losses
Paging systems often utilize 70 volt speakers as a way to distribute audio with a minimal amount of power loss in the wire run.
Typically, 70 volt speakers have an integral step down transformer that converts the high 70 volt signal down to a lower voltage,
but higher current signal the speaker needs. The benefits of running a high voltage paging system are identical to the benefits
of running high voltage power lines. That is, the higher the voltage is, the lower the current becomes. This is good because, as
with lower current, there is less loss of power in the long wire runs due to resistance in the wire.
Since the PA-30 has two amplifiers that are running in differential mode, the output across them together will have double the
voltage swing. This Bridge Tied Load (BTL) strapping of the two amplifiers enables the use of 70 volt speakers when wired
across screw terminals 1 and 4. If increased volume levels are needed, use a higher power tap on the 70 volt speaker. Even
though the PA-30 is able to drive either 70 volt or 8 ohm speakers, it is not recommended to mix 70 volt speakers and 8 ohm
speakers on the same PA-30, because the 8 ohms speakers will play louder at any given volume setting.
3. 70-Volt Speakers
If the instillation requires very loud paging, one or two 8 ohm speakers can be BTL strapped across the PA-30’s two amplifiers,
(like 70 volt speakers as described above). Connecting one or two 8 ohm speakers across screw terminals 1 and 4 of the PA-
30 will provide 6dB more speaker volume than normal. If more than two 8 ohm speakers are needed, wiring them as described
in section “1.” above will provide best results.
4. Very Loud Paging
8