ASL INTERCOM PS 4379, Руководство пользователя

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6.0 FRONT PANEL CONTROLS & CONNECTOR continued
8 SPEAKER ON/OFF
With this button the speaker can be switched on or
off. The LED within the button will light up if the
speaker is switched on. If the speaker has been
switched on when a headset was connected, the
speaker will automatically switch off. By pushing the
speaker on/off button, the speaker will switch back on
and the audio can be heard over both the speaker and
the headset. When disconnecting the headset, the last
setting of the speaker will remain.
9 SIDETONE LEVEL trimmers
These trimmers (one for each channel) adjust the level
of your own voice as it is heard over the speaker or
headset. It prevents the speaker from feeding back into
the gooseneck microphone.
Adjustment procedure for all sidetone trimmers:
- set trimmer in start position : fully clockwise.
- switch off the microphone of all connected
(speaker!) stations (TALK button).
- switch on the microphone of the PS 4379.
- turn up volume.
- speak into the headset microphone.
- adjust the listen level to a minimum by turning the
sidetone trimmers.
Adjusting the sidetone does not affect the level of your
voice as it is heard by other stations.
10 SIDETONE HI trimmers
These trimmers (one for each channel) control the
rejection in the high frequency range. It compensates
the capacity of the interconnecting cables. It prevents
the speaker from feeding back
into the gooseneck microphone (unit feedback). For
adjustment procedure see above in point 9.
11 SPEAKER ATTENUATOR trimmer
This trimmer allows you to dim the speaker
automatically, when the gooseneck microphone is
switched on. It prevents:
- unit feedback if sidetone rejection is not sufficient.
- system feedback or a 'hollow' sound when the
gooseneck microphones of other speaker stations
on the same channel are activated simultaneously.
Adjustment procedure :
- switch off TALK buttons.
- inject an audio signal on an intercom channel.
- turn up volume.
- activate microphone and adjust the desired amount
of attenuation.
The speaker attenuator has no effect when a headset
is used and the speaker is switched off.
12 BUZZER VOLUME trimmer
This trimmer adjusts the volume of the internal buzzer.
The buzzer is activated if you press a CALL of the
PS 4379 (or if a CALL button of any other station is
pressed to which the PS 4379 is connected), for
longer than 2 seconds, and if the buzzers on these
channels are not muted.
13 PGM VOLUME
This knob adjusts the volume of the PGM input. The
signal of the PGM input can only be heard on the
PS 4379 and does not appear on the intercom lines.
Manual PS 4379 - Issue 1 © 2007 ASL Intercom, Utrecht, The Netherlands 7