Message Recording; Setting Volume Control - Notifier AVL-1 Operation And Installation Manual

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WARNING:

ADEQUATE PROTECTION OF PEOPLE AND PROPERTY. FAILURE TO PROVIDE ALTERNATIVE SIGNALING MAY CAUSE

PEOPLE TO NOT BE WARNED OF AN EMERGENCY CONDITION, WHICH COULD RESULT IN PROPERTY DAMAGE AND

SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.

NOTIFIER EXPRESSLY DISCLAIMS ALL LIABILITY FOR THE CONTENT, CLARITY AND LANGUAGES OF, AND OUTPUT

CHANNEL AND PRIORITY LEVEL ASSIGNED TO, ANY AND ALL MESSAGES.

MESSAGE CONTENT AND LANGUAGE, SEQUENCE, OUTPUT CHANNEL AND PRIORITY ASSIGNMENTS REVIEWED AND

APPROVED BY QUALIFIED LEGAL AND SAFETY ADVISORS, QUALIFIED REPRESENTATIVE(S) OF OWNER(S) AND

USER(S), AND AUTHORITIES HAVING JURISDICTION.

To aid qualified personnel in performing necessary operational testing procedures, a script, listing all messages programmed in the

SAFEPATH panel, must be kept with the SAFEPATH panel.

This chapter describes the message recording procedures for the AVL-1. Included is information about the following AVL-1

capabilities:

•

Setting Volume Controls

•

Recording a Voice File

•

Creating a String File

•

Transferring Data

Performing the following procedures requires a knowledge of the display and keypad operation. Operation of the display and

keypad is explained in Appendix C. Appendix C must be read and understood before proceeding.

Setting Volume Controls

The AVL-1's record circuit has one microphone input volume control and one auxiliary input volume control. The playback circuit

contains one volume control for each of the four output channels. The locations of the six volume controls on the AVL-1 are shown

in Figure 2. Note that all volume controls can be accessed without removing the printed circuit board cover.

The two input volume controls determine the record level of messages from each of the two sources. If the input volume controls

are set too high the Analog-to-Digital converter circuit will be overdriven and/or the input preamps will have clipped outputs. Either

of these two conditions will cause distortion. If the input volume controls are set too low the Analog-to-Digital converter circuit will

be underdriven. This will cause distortion and louder than normal background noise.

The four output channel volume controls determine the playback level of messages on each of the output channels. If the output

channel volume controls are set too high, the output channel amplifiers will have clipped outputs causing distortion. If the output

channel volume controls are set too low, the AVL-1 may not detect the audio level properly.

Before recording messages the input volume controls and the output channel volume controls should be set according to the

procedures set forth below.

Input Volume Control Adjustment Procedure

Set output channel volume control to minimum.

Set input volume control to maximum.

Record a message.

Play message. If message sounds distorted, decrease the input volume control. Repeat from step 3.

Output Channel Volume Control Adjustment Procedure

Set output channel volume control to minimum.

Play a message. If message volume is too low, or if an output channel error is detected, increase the output volume control.

Repeat from step 2.

AVL-1 Manual

Rev. H August 2000

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