Страница 1: ...RM 220 2 CHANNEL REMOTE STATION INSTRUCTION and SERVICE MANUAL Clear COlli Intercom Systems 945 Camelia st Berkeley California 94710 510 527 6666 Clear Com 810193 8 24194 REV A ...
Страница 2: ...810193 C 1990 Clear Com Systems All Rights Reserved Clear Com Systems 945 Camelia St Berkeley Ca 94710 U S A While Clear Com makes every attempt to maintain the accuracy of the information contained in its product manuals that information is subject to change without notice ...
Страница 3: ...service follow the procedures described below in IIProced ures for Returnsll and IIShipping to Manufacturer for Repair or Adjustment 1I This warranty is the sole and exclusive express warranty given with respect to Clear Com products It is the responsibility of the user to determine before pur chase that this product is suitable for the user s intended purpose Any and all implied warranties includ...
Страница 4: ...r inches of excelsior or similar shock absorbing material A de tailed description of the problem or work to be done should be included All shipments should be directed to the attention of the Customer Service Depart ment and must include the Return Authorization Number Upon completion of repairs equipment will be returned collect via United Par cel Service or other specified shipper NOTICE ABOUT S...
Страница 5: ...main station or power supply Clear Com is a distributed amplifier system each main and remote station houses its own mic preampliller headset or speaker power amplifier and signaling drcuitry Low impedance mic input lines 200 Ohms and specially designed circuitry make Clear Com channels virrually immune to RFI and dim mer noise Clear Com main stations power supplies and certain remote stations eac...
Страница 6: ...y or on both at once Illumi nated dual action talk buttons are electronic momentary or latching The latch ing feature may be disabled if desired Also the talk buttons can be remote controlled for footswitch or other use Monitoring activity is possible through the speaker or headset or both at once The RM 220 features Visual Call Signaling to attract the attention of operators who have removed thei...
Страница 7: ...onse 250 Hz to 12 KHz contoured for intelligibility Gain from Headset to Intercom Line 41 dB PANEL MICROPHONE PRE AMP Input Level 45 dBv nominal Frequency Response 250 Hz to 12 KHz contoured for intelligibility Gain from Panel Mic to Intercom Line 31 dB adjustable SPEAKER AMPLIFIER Load Impedance 16 Ohms Output Level at least 4 watts Distortion 0 2 THD at 1 KHz Frequency Response 200 18KHz 2dB HEA...
Страница 8: ...hms Level 0 dBv STANDARD CLEAR COM SYSTEM SPECIFICATIONS Usable Line Quality 100 Stations Total Line Length on One Channel 5000 feet CONNECTORS Intercom 4 XLR 3 2 CH A 2 CH B Accessory DB 15F Program Input SA output Foot Switch Logic Inputs IFB HOT MIC 1 4 inch Phone Jack POWER REQUIREMENTS Source Intercom Line Voltage 20 30 VDC Current 65 rnA idle 120 rnA average PHYSICAL SPECIFICATIONS Dimension...
Страница 9: ...The receive or listen section of stations contain a hybrid null circuit that at tempts to reject null any talk signal being sent by that station on that chan nel The hybrid null circuit depends on a known impedance on the intercom line to accomplish this Variations in impedance on the line upset the null CAUTION All Clear Com Intercom lines must be terminated Care must be taken not to fail to term...
Страница 10: ...uctor affects crosstalk For runs longer than 500 feet do not use wire smaller than 20 gauge 2 The capacitance of the interconnect cable affects system frequency response and sidetone stability Total capacitance should not be greater than 0 25 uFo Portable Installation Cable Practical cable for portable system interconnec tions is flexible two conductor shielded microphone cable For runs less than ...
Страница 11: ...ltin 1 4 inch phone jack for a con nector A mating receptical is mounted on the RM 220 To install a GM 9 or GM 18 panel mount microphone use the following steps 1 Check the set screw in the mic mounting flange to make sure it is clear of the threads in the bushing 2 Screw the microphone into the bushing hand tight 3 Set the set screw on top of the bushing to lock the mic in place Intercom Line Con...
Страница 12: ...hone Audio Output Ring Control Signal 15 VDC Sleeve Ground Shield ACCESSORY Rear Panel DB 15F The Accessory DB 15F connector on the rear panel provides Program Input Announce Audio Output Announce Relay Contacts and Foot Switch inputs for activating a Talk on either channel The pin assignment of the connector is as follows ACCESSORY CONNECTOR DB 15F FOOT SWITCH COMMON FOOT SWITCH S FOOT SWITCH A G...
Страница 13: ... CALL signal is present on Chan B The RM 220 is shipped from the factory with all dip switches in the OPEN position To enable a function place that dip switch in the CLOSE position w Cf Z o W J a J 0 1 MOMENTARYONLYTALKSW A 2 MOMENTARY ONLY TALK SW B 3 AUTO CALL SIGNAL ON CHAN A 4 AUTO CALL SIGNAL ON CHAN B r s i i 5 ANNOUNCE TALK INTERRUPT ENABLE 6 IFB TALK INTERRUPT ENABLE 7 PROGRAM FEED ENABLE ...
Страница 14: ...e gain remove the top cover of the unit and ad just R154 on the right side of the printed circuit board Refer to the illustration below N3dO DIP CJ L J1 D 99 U DJRIO 2 f tiiii R2 79 I R2S 08 04 OIl 1 m C1 R4S 6 J ry1 l r W I I ICI RaJ I c F R8z R59 t c R23 C9 d R78 010 D5 1 _ c r R57 C80 0 RTu r I I I 8 R2 I t R58 8 I _ 05 C44 c r R60 I c r RI40 t E3C22 RI 22 c RI54 I I Rtf4 I RI23 R ICIO RIZ4 J J...
Страница 15: ...tening level A set of jumpers has been provided for compensating for lines shorter than 200 feet or longer than 700 feet Each intercom channel has its own jumper To change the setting of the Line Length Compensation Jumpers remove the cover of the unit and move the jumper for the appropriate channel The jump ers are next to P3 about in the middle of the board Refer the illustration be low for jump...
Страница 16: ... 1 amp Clear Com power supply that also provides the ter minations for both channels Channel B is connected to Talent Recievers for announcers A telephone line interface is connected to the Program input of station 2 that provides a program feed from the studio via a dial up telephone line Its dip switch options are set to insert program on channel B and interrupt the pro gram when a call signal i...
Страница 17: ...erminations for both channels A line of single channel beltpacks is connected to channel A The beltpacks are used for the cameras and floor managers Normal communication between all parties is on channel A Channel B is connected to Talent Receivers for announcers Program that is to feed the announcers is connected to the fIrst RM 220 Its dip switch options are set to insert program on channel B an...
Страница 18: ...ing The Intercom Line wiring has several purposes in the Clear Com system Interconnection of the audio intercom signal between stations Delivery of DC power for remote stations such as the RM 220 to operate from Termination of the intercom audio line external to remote stations Interconnect the intercom lines of stations and power supplies using a shielded twisted pair cable with XLR 3 pin connect...
Страница 19: ...EW T R lINALS To W _ AC POVo R CORO Ear P ce J i I XER Alo1P 1H PACINC CHANNEL B SPEAKER Interconnecting a Small Cable School Television Studio The entire system is wired using male female microphone cables looped through each station except for the MR l02s The MR l02 has screw terminals for the intercom lines The PS 22 provides the DC power for the system and the line termination switches must be...
Страница 20: ... source to the proper pins on the DB IS Set DIP switch 7 to the CLOSE position Set the Program Send Level control on the front panel just underneath the Ch B Listen Control for the desired level on the Intercom line If it is desired to interrupt this program feed when a CALL signal is present on the intercom line set DIP switch 8 to the Close position To Connect To The Program Input The Program In...
Страница 21: ... ohm load to provide a partial termination ACCESSORY CONNECTOR DB 15M PCMtER 30 VDC Viewed from the rear of the unit Connecting Party Line Products As Program Sources Internal IFB Operation To use Channel B as an IFB feed connect the Program source to the Program input as mentioned in the previous section and set DIP switches 7 and 8 to the CLOSE position The program will now be interrupted whenev...
Страница 22: ...s a 1 4 inch phone jack output on its rear panel intended to connect directly to a MA 4 and provide a microphone feed to the MA 4 The MA 4 can be ordered without a panel mounted microphone When a button is pressed on the MA 4 a control signal will temporarily transfer the microphone in use on the RM 220 to the MA 4 muting any Talks active on the RM 220 To connect the RM 220 to a MA 4 use a two wir...
Страница 23: ...ance that is transformer balanced and iso lated with a nominal output level of OdB To connect to the ANNOUNCE out put connect a shielded twisted pair cable to pins 6 and 13 of the ACCESSORY connector and use pin 5 for connection of the shield A relay is provided that activates when the ANNOUNCE button is pressed and its contacts are available on the ACCESSORY connector The relay is rated for 2 0 A...
Страница 24: ... Connection of External Talk Switches Inadequate Side Tone Adjustment The receive circuits of the intercom channels have been optimized for a Inter com Line length between 200 and 700 feet 60 and 200 meters The capaci tance of the intercom line must be compensated for in the receive circuits if a good sidetone null is to be achieved When using a speaker a good sidetone null is necessary to achieve...
Страница 25: ...eated with a rear panel dip switch LATCHING Pressing the button quickly will toggle the talk function alter nately turning it on or off MOMENTARY Pressing the button for longer than 1 4 second will tum the button press into a momentary function such that when the button is released the Talk function will tum off In any case the Talk function is activated all of the time the button is pressed TALK ...
Страница 26: ...o set the amount of the microphone that is heard in the earphone from that channel This control is a true hybrid null control and therefore is sensitive to changes in line loading For headphone use it is best to find the null for a given channel and then rotate the control clockwise to obtain the desired side tone level If the speaker and panel microphone are used together providing a possible aco...
Страница 27: ... Announce button allows the operator to instantly use the microphone input to directly talk to a system external to the intercom such as a paging speaker amplifier in another room A dry set of relay contacts on the rear pan el is also available that can be used to activate external switching as needed when the Announce button is pressed Pressing the Announce button momentarily disables any active ...
Страница 28: ... CBO I I I I 3IP2 I I 01 I P7 L D 3IPJ P I I 02 I I I Ip 0 RI c J R6 _ __IC _ _ _ _ ca I I 41 1 RI44 R48 en 01 4 C9 J 1 1 NRa9 3TPI rn _DI6 R62 f l1lbC J F F 0 lj t C20 R9S p t I3r J U 1 2 I V a Fnn 1 46 I IClZU R90 td t t s 8 I IC6 _ RJI c r I R7 c t Q B or I I ICl e J L R15 R lO C62 RI05 c J I I I I C64 I _ IC4 RJ R71 J rr SS _ J l IC7 R86 _ ICIS l I If4 RSS I _c _ R47 07 CSs L J4 1 d m J H I F ...
Страница 29: ...sc 30V 20 0 0022 uF Mylar 100V 5 0 0047 uF Mylar 50V 5 0 01 uF Ceramic Disc 30V 20 0 01 uF Ceramic Disc 1400V 20 0 022 uF Mylar 100V 10 0 047 uF Metal Polyester 100V 2 0 047 uF Mylar 100V 5 0 1 uF Monolithic 50V 10 0 22 uF Mylar 100V 20 0 47 uF Tantalum 35V 10 Clear Com Intercom Systems 1994 Part 210135 210103 470070 560018 470059 470038 470022 470069 450004 510110 510107 510106 510104 510111 Part...
Страница 30: ...10004 R37 R38 R91 R114 39 OHM 1 4 Carbon Film 5 410008 R156 R157 47 OHM 1 4 Carbon Film 5 410039 R46 R47 R67 50 OHM 5 Wire Wound 5 410186 R130 82 OHM 1 4 Carbon Film 5 410038 R106 100 OHM 1 4 Carbon Film 5 410071 R83 R88 430 OHM 114 Carbon Film 5 410106 R100 R113 R155 820 OHM 1 4 Carbon Film 5 410096 Rl34 R135 1K OHM 1 4 Carbon Film 5 410010 R90 l 5K OHM 1 4 Carbon Film 5 410055 R87 1 8K OHM 1 4 C...
Страница 31: ...arbon Film 5 410029 R50 R57 470K OHM 1 4 Carbon Film 5 410030 R8 R9 R11 R20 R22 R65 R68 R93 1M OHM 1 4 Carbon Film 5 410058 R39 R48 10M OHM 1 4 Carbon Film 5 410059 R82 R97 Diodes Transistors and Intergrated Circuits Device Description Part Designator 1N4003 RECTIFIER 1A 200PIV 480058 D6 D21 1N4148 SIGNAL DIODE 10MA 75PN 480000 D1 D2 D4 D7 D8 D9 D10 Dll D12 DB D14 D15 D16 D17 D18 D19 D20 1N957B DI...
Страница 32: ...CE 0 0 PANEL SIDET HEADPHONE o l o f tJ ao MIC S PANrL MIC o GAIN AD JUST 0 I l PROG o So LEVEL T b 01 l l m I tJ i N i II N o 3 J BAL LANCED PROG PROG MUTE PROGRAM VOLUME IV 8 INPUT i ci i 3 l 3 II 0 MUTE ENABLE ...
Страница 33: ...____ _ __ _______ ____________________ _ 0 l iii 0 INPUT CI C I _ IIII CONTINUED ON SHEET 2 NOTES UNLESS CT HERWlSE S ECIFIED rlOlOVOCri IC II _T_ I IO T O I n C I _ C 7 I e 2 C lT 1 i UTf c I I 0 f t Schematic Diagram Sheet 1 for the RM 220 Clear Com Intercom Systems 1994 Rev A ...
Страница 34: ...L TALK A K8 I I I 000 V III 4 CALL CALL I ll 11 lJ _ _ _ J J Il L u 3 Il A B II j l I I I 0 0i t oo l FLASH I I I I I l F1T Flp r T 1 u u u U CONTI NUED FROM SHEET 1 P On ER GNO OF I Cs Schematic Diagram Sheet 2 for the RM 220 Clear Com Intercom Systems 1994 Rev A ...
