Страница 1: ...KB 111A Speaker Station INSTRUCTION and SERVICE MANUAL III I Clear Co I Intercom Systems 945 Camelia St Berkeley California 94710 510 527 6666 Clear Com 810026 8 15 88 REV C...
Страница 2: ...OCUMENTATION ADDENDUM KB ll1A MANUAL f REV A j November 17 1987 I 1 r MIC TO LINE GAIN LEVEL INCREASE In effecting a 4dB Mic to Line Increase In gaIn level the following changes have been made Change...
Страница 3: ...lustrations Headset Y Cable 2 Figure 1 Figure 2 Headset Extension Cord 2 Figure 3 KB IIIA Mounting Dimensions 4 Figure 4 KB IIIA Block Diagram 4 Figure 5 Two Channel Interconnect Wiring 5 Figure 6 Por...
Страница 4: ...one jack for a stan dard carbon headset AND one 4 pin male XLR type connec tor D4M for a dynamic headset telephone style handset or push to talk mic The KB lllA provides an adjustable sidetone circuit...
Страница 5: ...replaceable cords The KB 111A drives two dynamic headsets with only a slight 3 dB reduction in level Clear Com can supply you with Model YC 100 y Cable which allows you to plug two headsets into the o...
Страница 6: ...one channel on the KB 111A disable the Channel Select switch by jumping Channels A and B together on the connector block and hook the intercom audio line to either terminal 2 or 3 If you don t disable...
Страница 7: ...ACK BOX _ I 6 1 e e o 6 5 a e e I o 5 Y MINIM UM 3 _ _ o j J E 1 25 DEPTH 1 FIGURE 3 KB A MOUNTING DIMENSIONS KB 111A BLOCK DIAGRAM CARBON HEADSET CO NEC TO I IC DYNAM e I HEADSET CONNECTOR t I M C GA...
Страница 8: ...WO CHANNEL CONNECT TO EARTH GROUND IF NON GROUNDED ENCLOSURE IS USED 2 2 CONDUCTOR SHIELDED PAIR NOTE IF WIRES DO NOT FIT IN STATION CONNECTOR BLOCK USE SEPARATE TERMINAL STRIP OR JUNCTION BLOCK TO CO...
Страница 9: ...it from the wall a console or where ever Use standard two conductor mic ca ble i e Belden 8413 with 3 pin connectors to interconnect the por table station within the intercom system The pin out assig...
Страница 10: ...actory Clear Com sets the sidetone to be approximately 6 dB lower than incoming signals If you want to change this level take these steps 1 plug in headset 2 turn on mic 3 turn up volume all the way 4...
Страница 11: ...Preamp Gain 31 dB Hax Input Before Clipping 20 dB Hic Limiter Threshold 37 dBm HEADSET SPEAKER AMPLIFIER Freq Response 100 18k Hz 2 dB Load Impedance Range 8 2000 ohms dynamic headset Output Level 20...
Страница 12: ...Station Remote Station i e KB lllA have selected Chan nel B for communication Yet they want to be capable of receiving a Call signal from stations that are communicating on Channel A This is achieved...
Страница 13: ...R12 4 7K Q4 z J5b40 R33 Z7K 470 II C9 Z7PF R Z70K e I C 0 lID ill co Rll 2 K 470 VCC CHI I 10 R3B NP 1 51 1 l Y 1 R8 15K 15 1 R9 lOt 01 1 J5406 Rib 2 71 R41 CZ4 7 047 R42 Z 67 I en c ll if II I rl 0 O...
