User Manual PS 155 / Issue 1
8
2001 ASL Intercom, Utrecht, Holland.
4.0 FRONT PANEL CONTROLS
High
Low
Test
tone
CALL
PTT
SIDETONE
TX CONTROL
Send
AUDIO LEVEL
Receive
1 Receive VOLUME control knob
This knob adjusts the level of the audio
that is received from the wireless unit.
2 Send VOLUME control knob
This knob adjusts the level of the audio
that is send to the wireless unit.
3 SIDETONE low trimmer
This trimmer adjusts the low frequency
rejection of the sidetone. Please refer to
section 7.0 for the proper adjustment
procedure.
4 SIDETONE high trimmer
This trimmer adjusts the high frequency
rejection of the sidetone. Please refer to
section 7.0 for the proper adjustment
procedure.
5 SIDETONE level trimmer
This trimmer adjusts the rejection level of
the sidetone. Please refer to section 7.0
for the proper adjustment procedure.
6 sidetone TEST TONE button
This recessed test tone button enables
you to easily adjust the sidetone
rejection for the complete frequency
range. Please refer to section 7.0 for the
proper adjustment procedure.
7 VOX LEVEL trimmer
This trimmer adjusts the detection level
of the VOX switch. When the VOX
detects an audio signal on the intercom
line that is louder than the level set by
this trimmer it switches the wireless unit
to transmit. Please refer to section 8.0
for the proper adjustment procedure.
8 VOX RELEASE trimmer
After the audio signal of the intercom line
falls below the level of the VOX, it will
stay active for a period of time that is
preset by this trimmer. Please refer to
section 8.0 for the proper adjustment
procedure.
9 TX MODE switch
This switch determines how the wireless
unit changes from receive to transmit. It
has three positions; VOX, CALL and
PTT. Please refer to section 9.0
10 POWER led
This LED will light up green when the
unit is powered by the intercom line.
11 Rx/Tx led
The LED is lit green when the wireless
unit is in receive mode and it will be lit
red when the wireless unit is in transmit
mode.
(9 strony)
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