User manual ASL INTERCOM PS 230

[. . . ] It incorporates a loudspeaker and a gooseneck microphone and provides full duplex communications within an ASL intercom system. The PS 230 RM model has a small built-in electret microphone. Each channel has a Volume (listen level) control, a Talk and Call button with LED indicators and a two-stage sidetone trimmer. The unit is equiped with a limiter for the gooseneck microphone, allowing the user to speak close into the microphone without giving rise to overload and distortion. [. . . ] HEADSET connector A XLR-4 type connector for the connection of a local headset when private conversation is desired. This must have a can impedance of 200 ohms (or greater), or each 400 Ohms minium when in parallel. The headset microphone may be of the dynamic or electret type. phones When connecting a headset, the speaker and gooseneck microphone will be disabled automatically. The PS 230 can optionally be equipped with a XLR-6 headset connector for binaural use. Channel A will then appear on the left can and channel B on the right can. 2 6 3 CALL buttons These push buttons activate the call system, for each channel separately. A momentary push will send a call signal to all stations connected to the intercom channel and the call LEDS will start flashing. Press and hold the button for 2 seconds will activate the call buzzer, if not muted. After the CALL button is released the LEDS will continue to flash for further 2 seconds. SIDETONE LEVEL trimmers These trimmers (one for each channel) control the level of your own voice as you hear it in 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 microphones of all connected (speaker !) stations. - switch on the microphone of the PS 230. - adjust the listen level by turning the sidetone trimmer. The operating area is between fully clockwise and minimum level. Adjusting the sidetone does not affect the level of your voice as it is heard by other stations. 8 4 2 User Manual PS 230 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland. 4. 0 FRONT PANEL CONTROLS & CONNECTOR 9 GOOSENECK MICROPHONE A high quality electret noise canceling microphone. A limiter prevents the microphone preamplifier from clipping when speaking close into the microphone. The gooseneck microphone is automatically disabled when a headset is used. 10 LOUDSPEAKER A high quality loudspeaker driven by a 3. 5 Watt amplifier. The speaker is automatically disabled when a headset is used. 5. 0 SIDE PANEL CONNECTORS 11 LINE connector channel A 12 LINE connector channel B These XLR-3 connectors are for connecting the PS 230 to the intercom system. audio wire 6. 0 INTERNAL CONTROLS Inside the unit there are two trimmers to adjust the mic gain of the gooseneck microphone and the headset microphone separately. These internal trimmers can be reached as follows : - remove the screws of the bottom plate. [. . . ] Connect ASL power supply to a 'clean' mains outlet The ASL power supply may be connected to the mains power outlet to which other audio equipment is connected. output level normal 14 V rms (200 ohms) binaural 8 V rms (400 ohms) max. output power normal 0. 5 W rms (each can) binaural 0. 16 W rms (each can) SPEAKER DRIVER AMP speaker impedance max. output current output impedance SIDETONE rejection BUZZER max. [. . . ]