Viking fbi-1a Service Manual

Telecommunication Peripheral Products

Anti-Feedback Paging

Technical Practice

FBI-1A

Interface

August 4, 1999

Totally Eliminate Paging Feedback

Even the best designed paging systems can
experience feedback. Now you can eliminate
annoying feedback over your paging speakers
with Viking’s model FBI-1A digital anti-
feedback paging interface.

The FBI-1A utilizes state of the art digital
recording technology to record the “live” page
from a phone system’s paging port output or
unused trunk port. The FBI-1A then
immediately plays back the recorded page once

oor twice (selectable) over the paging system.

Pages of up to 16 seconds (expandable to 60 seconds) can be stored and the FBI-1A
automatically adjusts to the page length for faster processing. In addition, the FBI-1A
can be programmed to provide pre-page and post-page alert tones.

http://www.VikingElectronics.com

VIKING©

[e-mail]

Features Applications

• High quality (64K) digital message storage

• High output - 2V RMS into 600 ohms

• 16 second record time expands to 1 minute
using an ERAM-60 Memory Kit

• Compatible with Paging ports or Trunk ports

• Activate recording from VOX detection, contact
closure or loop detect (Trunk mode only)

• VOX sensitivity adjustment

• Cancel page feature

• Selectable page repeat

• Selectable pre-page alert tone

• Selectable post-page alert tone

• Adjustable alert tone volume

• N.O./N.C. relay contacts control paging
system

• Record/Playback LED indicator

• Compatible with virtually all paging and
telephone systems

Eliminate Paging Feedback in:

• Warehouses, Factories, Offices

• Retail Stores, Hotels, Airports

• Stadiums, School Gymnasiums, Pools

• Casinos, Bingo Halls, Dining Establishments

• Other large noisy areas

Sales...(715) 386 - 8861

Specifications

Power: 120V AC/13.8V AC 1.25A, UL listed adapter provided
Dimensions: 133mm x 89mm x 44mm (5.25” x 3.5” x 1.75”)
Shipping Weight: 0.73 kg (1.6 lbs)
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-

condensing humidity

Sampling Rate: 64K (equivalent)
Maximum Page Length: 16 seconds (expandable to 60 seconds
with Viking model ERAM-60 memory upgrade kit)
Output Impedance: 600 ohm
Maximum Audio Output: 2V RMS (driving a 600 ohm load)
Talk Battery: 24V DC (Trunk mode only)
Connections: 10 position screw terminal block

Installation

VIKING

PAGING

Paging Volume

(see Programming section H)

120V AC

Mode Switch (see Programming section A)
Page LED - Lights during recording and playback

(see Programming section I)
Page Alert Tone Volume (see Programming section G)
Paging Options (see Programming section C)

Phone System

(PABX/KSU)

600 ohm paging port
or unused trunk port

VOLUME

MAX

MIN MAXMIN

POWER 13.8V AC

PAGING OPTIONS

PAGE REPEAT

PRE-PAGE TONE

POST PAGE TONE

MODE SWITCH

PAGING

TRUNK

PORT

PORT

PAGE

LED

MODEL FBI-1A

©

VIKING

ELECTRONICS

HUDSON, WI 54016

DIGITAL ANTI-FEEDBACK

PAGING INTERFACE

600 OHM

AUDIO OUT

PAGING

INPUT

12345678 910

PAGE
TONE

VOL

123

VOX

SENSITIVITY

PAGING

CONTROL

OUTPUT

COMMON

CANCEL PAGE

RECORD PAGE

N.O.

600 ohm

page output

(to paging amp input)

VOX Sensitivity - Voice Operated

Recording Adjustment
(see Programming section B)

Paging Control Output
(see Programming section D)

N.C. relay contact
COM. relay contact
N.O. relay contact

Cancel Page (see Programming section E)
Record Page (see Programming section F)
Common

VIKING©

POWER 13.8V AC

MODE SWITCH

TRUNK/PAGING PORT

PAGING

MUSIC

INPUT

INPUT

MODEL CPA-7B

PAGING
VOLUME

VIKING

ELECTRONICS

HUDSON, WI 54016

GENERAL PURPOSE TELECOM

PAGING SYSTEM

SPEAKERS

600 OHM

1 2 3 4 5 6 7 8 9 10

RING TRIP

TIME
OUT

RING/ALERT TONE

VOLUME

COMMON

AUDIO OUT

NIGHT BELL

PAGE TRIGGER

TALK BATTERY

PAGE W/ COMMON AUDIBLE

RING TRIP PAGE W/ NIGHT BELL

Model CPA-7B

Paging Amplifier

(not included)

Programming

A. Mode Switch

In the Trunk Port position, 24V talk battery is supplied for connecting the FBI-1A paging input to a phone system’s
unused trunk port. In the Paging Port position, a 600 ohm audio input is supplied for connecting to a phone
system’s paging port output.

B. VOX Sensitivity

If the FBI-1A is installed on a phone system’s paging port that does not supply a page control contact (normally
open relay contact that closes while the paging port is activated) the VOX (Voice Operated Recording) feature may
be used. The VOX sensitivity may require adjustment. Rotate the POT clockwise to increase the sensitivity for low
level input signals (see Programming section I).

Note: The VOX (Voice Operated Recording) feature is not used in the trunk mode or when a page control contact is
connected to the record page input of the FBI-1A to trigger the recording. In these applications, set the VOX
sensitivity to the minimum level.

C. Paging Options

1. Post-page Tone - The FBI-1A will output a short (high) beep after the entire page has been played, indicating

that it is ready to record a new page.

2. Pre-page Tone - The FBI-1A will output a (low) beep before the page, alerting listeners of the oncoming page.

3. Page Repeat - The FBI-1A will play the recorded page twice, eliminating the need to repeat pages.

Note: To disable a feature, move the corresponding DIP switch to the OFF position.

DIP Switch

1 - ON
2 - ON
3 - ON

Feature

Enables post page tone
Enables pre-page tone
Play message twice

1

2

3

123

ON

OFF

VIKING

PAGING
VOLUME

MAXMIN MAXMIN

DIGITAL ANTI-FEEDBACK

PAGING INTERFACE

POWER 13.8V AC

PAGING OPTIONS

PAGE REPEAT
PRE-PAGE TONE

POST PAGE TONE

MODE SWITCH

PAGING

TRUNK

PORT

PAGE

PORT

TONE

PAGE

VOL

LED

123

MODEL FBI-1A

©

VIKING

ELECTRONICS

HUDSON, WI 54016

600 OHM

AUDIO OUT

PAGING

INPUT

12345678 910

VOX

SENSITIVITY

COMMON

RECORD PAGE

PAGING

CONTROL

OUTPUT

CANCEL PAGE