A4 Pad Control And Agc; A4.1 Pad Controls; A4.2 Agc - Panasonic KX-TDA0480 Installation Manual

Appendices

A4 Pad Control and AGC

PAD is a voice line gain/loss function expressed in decibels (dB). The KX-TDA0480 is able to
insert a digital pad in the outgoing and/or incoming speech path in order to optimise the gain
or loss level of the voice signal.
The KX-TDA0480's AGC (Automatic Gain Control) functions on the PAD In side in a manner
similar to that of the PAD In function, but operates by automatically adjusting the voice signal
to a preset level.

A4.1 PAD Controls

The default Pad settings can be modified by the user. This is usually done on a network-wide
basis.
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:
Voice level too low:
Voice loud/distorted:
Excessive background noise: Decrease gain by increasing PAD level.
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 =
PAD In =

A4.2 AGC

When enabled, the AGC feature allows the KX-TDA0480 to adjust the voice signal strength to
a predetermined level.
As a rule, it is recommended that the PAD In value be set to 0 dBm when using this feature.
146
Increase gain by decreasing PAD level.
Decrease gain by increasing PAD level.
0 dB
0 dB
Installation Manual