ASL INTERCOM PS 155 Manual de usuario descargar pdf (Pagina 8)

PAGE 8

User Manual PS 155 / October 2013 © ASL Intercom BV

8.0 VOX ADJUSTMENT PROCEDURE

Before starting this procedure make sure that the

party line side tone has been properly adjusted

(see section 7.0) !

To adjust the VOX, proceed as follows:

• Put the TX CONTROL select switch to

“VOX”

• Turn the LEVEL and RELEASE trimmers

counter clockwise

• Connect an intercom user station to the

party line, connect a headset to that

station and speak into the microphone of

headset

• With the LEVEL trimmer adjust the audio

level on the party line to which the PS 155

should trigger the wireless unit to go from

receive mode to send mode (the Rx/Tx

LED changes from green to red)

• With the RELEASE trimmer adjust the

release time of the VOX switch

The attack time of the VOX switch can be

adjusted by internal trimmer R9, see section 9.0.

9.0 INTERNAL CONTROLS

To access the internal trimmers the PS 155 needs to be opened. Before doing so, disconnect the unit of

all other equipment. Open the PS 155 by removing the two screws of the cover at either side. Then

connect the PS 155 to the intercom party line and to the wireless unit.

OUTPUT GAIN trimmer (R4)

With this trimmer the output gain can be adjusted.

The trimmer is located on the PCB board at the

left, near to the transformers.

To increase the gain, turn clockwise.

To decrease the gain, turn counter clockwise.

VOX DETECT trimmer (R9)

With this trimmer the attack time of the VOX

switch can be adjusted. Proceed as follows:

• Set the TX CONTROL select switch to

position “VOX”

• Connect a user station to the intercom

party line and connect a headset to that

station

• Speak into the headset microphone

• First adjust the LEVEL and RELEASE

trimmers at the front panel

• Then adjust the attack time with trimmer

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ASL INTERCOM PS 155 Manual de usuario Pagina 8

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