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PAGE 8
User manual PS 155 / Issue 2011 © ASL Intercom BV
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9.0
SIDE TONE ADJUSTMENT PROCEDURE (PARTY LINE)
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To adjust the side tone, proceed as follows:
Connect the PS 155 to the wireless unit
If the wireless unit has a volume control
turn it down to approx. 10%;
a volume that is too high may cause
problems such as distortion
Connect the PS 155 to the party line of
the wired ASL intercom system
Put the SEND and RECEIVE volumes of
the PS 155
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pencil
Listen to one of the wireless units
(not the
one which has the connection cable)
Adjust the 3 side tone trimmers so that at
the wireless unit the test tone listen level
is set to a minimum. First the LEVEL
trimmer and then the HIGH and the LOW
trimmer.
If needed, the SEND volume of the PS
155 can be turned up while adjusting the
trimmers
Repeat the adjustment of the trimmers
over and over until you are sure that you
have obtained the minimum listen level
10.0
VOX ADJUSTMENT PROCEDURE
Before starting this procedure make sure that the
party line side tone has been properly adjusted
(see section 9.0) !
To adjust the VOX, proceed as follows:
Put the TX CONTROL select switch to
³
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 11.0.
