Alpha Technologies IPDP - 00C Uživatelský manuál stáhnout pdf (Strana 7)

The PCB heating has two major benefits. Firstly, it warms the board

during winter time (temperatures under -20 C, most circuits have warranty

operation down to -20 C) and secondly it helps to protect the PCB against

humidity when installed outside.

2.1.5 Voice level

10. Voice communication  the trimmer position is factory and should be

suitable for most installations. Change the trimmer position only when

necessary.

The trimmer "MIC" is designed

for microphone volume setting.

The trimmer "SPK" is designed

for loudspeaker volume setting.

The volume settings are more

than adequate for most situations.

Therefore we do not recommend

setting the trimmer position more

position

is 1/3 from minimum amplification.

The trimmer "TRH" is designed

for setting the microphone

activation level. It allows balancing

between the microphone and

speaker to eliminate feedback.

This setting is also influenced by

the noise of the surrounding environment.

Set up Process: The trimmers MIC and SPK are set to position from

minimum loudness level (turn fully anti-clockwise for minimum). The trimmer

TRH is set to a central position. To fine tune, make a test call. Speak quietly,

and by adjusting the trimmer TRH from the central position anticlockwise,

your speech should be heard more clearly by the PBX user. The amplification

of the speaker can be adjusted according to your requirements. Voice

interruption might occur if you set the amplification too high. In this case you

can use the trimmer TRH to correct the balance between the speaker and the

microphone.

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Alpha Technologies IPDP - 00C Uživatelský manuál Strana 7