BS 15 SINGLE CHANNEL BELTPACK USER MANUAL Issue 2011 © ASL Intercom BV DESIGNED & MANUFACTURED BY: ASL Intercom B.V. Zonnebaan 42 3542 EG Utrecht The Netherlands Tel: +31 (0)30 2411901 Fax: +31 (0)30 2667373 Email: info@asl-inter.com Web: www.asl-inter.
CONTENT OF THIS USER MANUAL 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 GENERAL DESCRIPTION ............................... 3 UNPACKING ......................................... 3 INSTALLATION ....................................... 3 WARRANTY ......................................... 3 FRONT PANEL CONTROLS ............................. 4 REAR PANEL CONNECTORS ............................ 4 INTERNAL CONTROLS ................................. 5 TECHNICAL SPECIFICATIONS ..........................
1.0 GENERAL DESCRIPTION The BS 15 is a portable single channel user station housed in a strong ABS case. On the front panel are a Volume (listen level) control, a TALK and a CALL button both with LED indicators, a side tone trimmer and a buzzer volume. Special attention has been paid to the intelligibility of speech. By applying low noise/high speed opamps, a speech presence filter and a specially developed 2.
5.0 FRONT PANEL CONTROLS 4 SIDETONE trimmer This trimmer adjusts the level of your own voice as you hear it in your headset. 1 VOLUME control knob This knob adjusts the listen level for the headset. 2 TALK button This push button activates the headset microphone, the large green LED indicates if the microphone is switched on. 3 CALL button This push button activates the call system.
7.0 INTERNAL CONTROLS MIC GAIN The gain for the headset mic can be adjusted internally by a trimmer. The trimmer is located on the lower PCB board. Open the BS 15 by removing the four screws on the underside To increase mic gain turn clockwise. To decrease mic gain turn counterclockwise 8.0 TECHNICAL SPECIFICATIONS General System Specifications dynamic range: 80 dB (1 kHz, THD<1%) call signal (send): +2.8 mA call signal threshold (receive): +2.
10.0 CABLING The intercom lines (the ‘party lines’) are of the shielded two-conductor microphone cable type. The intercom line connectors are of the XLR-3 type. Audio and Call signals are on pin 3, DC power is on pin 2 and pin 1 is connected to the shield of the cable which functions as the common return for audio and power. The audio signal is transferred in an unbalanced way (see ‘Party Line, Technical Concept’).
11.0 EARTHING CONCEPT 12.0 SYSTEM CONFIGURATION PAGE 7 User Manual BS 15 / Issue 2011 © ASL Intercom BV .
13.0 BLOCK DIAGRAM BS 15 PAGE 8 User Manual BS 15 / Issue 2011 © ASL Intercom BV .