Panasonic KX-TDA0480 Installation Manual

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Panasonic KX-TDA0480 Installation Manual Manual pdf 146 page image

Appendices146 Installation ManualA4 Pad Control and AGCPAD is a voice line gain/loss function expressed in decibels (dB). The KX-TDA0480 is able toinsert a digital pad in the outgoing and/or incoming speech path in order to optimise the gainor loss level of the voice signal.The KX-TDA0480's AGC (Automatic Gain Control) functions on the PAD In side in a mannersimilar to that of the PAD In function, but operates by automatically adjusting the voice signalto a preset level.A4.1 PAD ControlsThe default Pad settings can be modified by the user. This is usually done on a network-widebasis.In most cases it should not be necessary to modify the default PAD In and PAD Out settings.Indications that some adjustment is required are:The following issues should be considered when adjusting the pad control.• The digital pad value for the KX-TDA0480 can be selected as -40,-38,c,-14, -12, -10, -8,-6, -4, -2, 0, +2, +4, +6, +8, +10, +12, +14 dB.The unit default settings are:PAD Out = 0 dBPAD In = 0 dBA4.2 AGCWhen enabled, the AGC feature allows the KX-TDA0480 to adjust the voice signal strength toa predetermined level.As a rule, it is recommended that the PAD In value be set to 0 dBm when using this feature.Voice level too low: Increase gain by decreasing PAD level.Voice loud/distorted: Decrease gain by increasing PAD level.Excessive background noise: Decrease gain by increasing PAD level.