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Summary of Contents for TW1222-CM

Page 1: ...TECHNICAL MANUAL TM36001OIN9300 360040 IMODEL TW1222 1 1 2 2 4 1 Including TW1222 T TW1222 CM TWI SK7O DCU TW Intercom System Interface Units RTS SYSTEMS A Telex Communications Product...

Page 2: ...tainer and the contents carefullyfor any discrepancies or damage Should there be any notify the freight companyand the dealer at once The shippingModel T W I 2 2 4 TWI222container should containthe fo...

Page 3: ...asand Intercoms 2 1 22 RTSTo 2 WueSystems 2 2 23 RTSTo2 WmTelephoneW e t p r y I 2 3 2 4 RTSToRCAPavenSystems 2 5 sEClTON3 OPERATINGINSTRUCTIONS 1 3 1 Introduction 3 1 3 2 RTS To 4 Wue SystemsOperatio...

Page 4: ...P C B TWI224Hold CircuitLayout 7 4 EngiaeeringNote TWISK70DCUInterfaceCard 7 5 wkhg Diagram TWISK70 DCU Interface 7 6 TWI SK70 DCU 4 Wue InterfaceW SAP 1024 sheet 1of 2 7 7 sheet2 of2 7 8 SchematicDi...

Page 5: ...MERClUNTABlLlTY ARE LIMITED TO THE DURATION OF THIS EXPRESS L I E D W A R R A N T Y NEITHER RTS SYSTEMS NOR TEE DEALER WHO SELIS RTS SYSTEMS PRODUCTS IS LIABLE FOR INCIDENTAL OR CONSEQUENTIALDAMAGES O...

Page 6: ...TS system to a four wire intuwm system This would 13 SPECIFICATIONS include some t e l d o n broadcast cameras the MeCurdy interwm systems radiotelephones and Typ ncal Gain 14to20 dB eachdirection cam...

Page 7: ...anelXLR on the TWI 2 2 4 Coaned the talkbus of the4 wire systemtopins 3and4of the 4 pin front panelXLR asshownin figure 2 1 Thistalkbusmust present a 100ohm to 400ohm impedanceto the output of theTWI...

Page 8: ...controls to minimum Connectthe RTSline to the RTS LINEjack on the rear of the TWI 222 Conned the externalintercomlineto pins 3and 4 of the front panelXLR 4 wnnector See figure 2 2 Thisinput iscapacito...

Page 9: ...canwithstandvoltages ashigh asMvolts Onrack mount interfaces lWI 222T RM the rear panel stereophonejack is connectedin parallelwith the front pel XLR 4 Thusthetip andring of the rear phonejack maybe...

Page 10: ...UAL Model lWI224 TWI222InterfaceUnits TO TO TELEPKNJE TWI 222 T RM RI REAR PANZL Figure2 4 ConnectorAnd CableW iForTheTWI m T RM RTS SystemsBurbank CA 91506 FSCM 60572 T h 9 6 0 0 SecondEdition July 1...

Page 11: ...n excesiw sidetoneon both systems T h i sisusuallysuitablefor a smallnumber of stations less than7 T O T I P RING SLEEVE JACK ON CARBON MIC SYSTEM T O XLR 4 ON TWI 224 SWITCHCRAFT SWITCHCRAFT PLUG A 4...

Page 12: ...r on the wire system adjst the GAIN controls until both people canhear eachother clearly 33 RTSTO2 WIRESYSTEM OPERATION After making thecomeetionsd e s a i d in sectinn22 se3 allGAINand BALANCEcontrol...

Page 13: ...GAINTO RTSto maximum Adjust the BALANCE TO RTS control for a null in the noise asheard on the RTS system Reduce the GAINTORTS tominimum The interface is now balaaced and care ahodd be t a k e n not t...

Page 14: ...itwhichisusedin theTWI222 TandTWI222 T RM 43 FUNCTIONALDm ON Figure 4 1 shows the block diagram of the T W I 2 2 4 The RTS ZW intercom comects to the XLR 3 31 eonnebmatthelowerlett LML 5mAfiOLT A XLR...

Page 15: ...E l 2 BLOCK DESCRIPTION F w e 4 2 is the block diagram for the TWI222 It is similar to the he except there are two balance wntrols and only one transformer Power for the interfaceisderived from chann...

Page 16: ...TO RTS RTS 20db A A XLR 3 31 4 CURRENT SOURCE 3 RTS 7 CHANNEL 12 SELECT 1 REGULATOR CONNECTOR IN RACK MOUNT RM E VERSIONS CONNECTOR IS AN XLR 4 32 MALE Figure 4 2 TWU22BlockDiagram RTSSystemsBurbank...

Page 17: ...use a bilateral m n t soum converts a varying voltage input to a varying current output Hence current source When the input voltage is not varying ie no input the output current will not vary In order...

Page 18: ...MANUAL ModelTWllZQ TWU22 InterfaceUnits SECTION5 MAINTENANCE 5 1 CHANGINGIMPEDANCE APP NOTE DR 501 see followingapplication note RTS Systems Burbank CA 91M6 FSCM 60572 TMXXXX SeumdEdition July 1 9 8...

Page 19: ...t o 50 ohms o r 800 ohms nominal I n t h e 50 ohm mode t h e i n t e r f a c e w i l l handle 25 t o 100 ohms I n t h e 200 ohm mode t h e u n i t w i l l handle 100 t o 400 ohms When t h e i n t e r...

Page 20: ...0 2 2 Application Note SUBJECT TWI 224 INTERFACE APPLICATION CHANGING IMPEDANCE GENERAL INFORMATION SPECIFIC DATA CUSTOMER DATE 2 5 80 APP NOTE DR 101 PAGE 2 OF 2 2 WIRE 800 OHMS 4 WIRE 800 OHMS OUTP...

Page 21: ...TS Systems 1100W ChestnutStreet Burbank CA 91M6 818 5666700 63 SHIPPINGLIST TWD24 rn DESCRIPTION L ModelTWI224Interfaw 1 InstructionManual 63 1 SHIPPINGLIST lWUZZ 1 ModelTWll22Interface 1 Instruction...

Page 22: ...60 2511 001800 2511 004200 9080 2319 00 6 6 FRONTPANELASSEMBLY 1WU22 l J224 9020 219300 DESCRIFTION PTSPARTNUMBER Lug Solder 4 Smith 14144 100UXX 4a0 Nut Hex Kep 4 40 1007 0001 00 Nut Hex318 1007 0003...

Page 23: ...uf Mv Cap Elec47uf l6v Radial Cap Mylar 001uf loOVRadial 10 Cap M y l a r 0047 100V Radial D i o d e lN914BS i Diode IN4004 1 Amp W V Diode lN5233AVoltage Regulator Diode lN5365BZener VoltageRegulator...

Page 24: ...PARTNUMBER 2 Washer TeflonSeastrom5612 37 40 1006 004400 8 S a w8 32x112 loodeFlatHDPhilNKLPLST 10088031 M 2 P o t DL lOK lOK CP AB 26M907 1407 4 Y73ShieldBeadFairrite2 6 m 1 24W 0001 00 2 Knob D u a...

Page 25: ...am TWISK70 DCUInterface 7 6 TWISK70 DCU 4 Wm InterfaceW SAP 1024 sheet 1of 2 7 7 sheet2 of 2 7 8 SchematicD i a m TWISK70 DCU 7 9 AssemblyDiagram TWI SKMDCULayoutChart 7 10 TWI SK7 DCU SquelchCircuitP...

Page 26: ...RTSSystemsBurbank CA91W 6 FSCM 60572 TM3i l SecondEdition July 1989 Page7 2...

Page 27: ...IS J305 70 92 CASE EARLY VERSlONS Ql 1 5 El05 TO IB PIN CIRCLE 2 C3 NOTON RD F C RFUTURE USE NOTES I MSUED LINES INDICATE RMON DOTTOM Or 0 AssemblyD i i P C B TWI2 24InterfaceLayout RTS SystemsBurban...

Page 28: ...P VPE 17M 28V 04A 34MSCP SK IIR NCANDESCENT T 1314 W RE LEAD LAMP h MOUSER ELECTRONICS PARTY 5 7 9 17 4 MOUNT LAMPS FLAT AGAINST RC MIARD APPLY A DROP OF CLEAR SILICON TO LAMP BASES TO HOLD THEM IN PL...

Page 29: ...LANCE for null in headphones 7 Move carbon mic headset plug to DCU AUX INCOM module 8 Set Headphone gain on AUX module midway Set GAIN controls on interface so that you and a person on the RTS line ca...

Page 30: ...1 DCU REAR VIEW CHROMA AUX CARD KEY RGB INCOM CARD J 1 3 J 9 OUTPUT CARBON MIC 4 WIRE INPUT EST TEST JACK PLUG RTS INTERFACE INTO THIS SOCKET Wiring Diagram TWISK70 DCU Interface RTSSystemsBurbank CA...

Page 31: ...eeds t o be c o n v e r t e d t o 4 wire To do t h i s move t h e zero ohm jumper shown below Remove t h e jumper t h a t goes from t h e balance p o t wiper R15 t o t h e GAIN FROM RTS p o t R16 H I...

Page 32: ...h e gain up t o 600 ohms may be used To reduce t h e gain a s low a s 100 ohms may be used IWML I Iru4 sb IelO 1151 a 7 0 ill a Adjust t h e GAIN F R O M RTS p o t s o t h a t t h e l e v e l on t h...

Page 33: ...TECHNICALMANUAL Model TWU24 TWI222InterfaceUnits SchematicDiagram IWISK70 DCU RTS Systems Burbank CA 91506 FSCM 60572 TM3600 SecondEdition July 1989 Page7 9...

Page 34: ...TECHNICALMANUAL Model TWI224 TWI222InterfaceUnits OnJUMPERS lil OPTION L I NOTES Assembly Diagram IWI SK70 DCULayout Chart RTS SystemsBurbank CA 91M6 FSCM 60572 TM3600 SecondEdition July 1989 Page7 10...

Page 35: ...ch The complete i n s t a l l a t i o n is o u t l i n e d below 1 P l a c e t h e main board component s i d e up c a r d edge f i n g e r s pointed t o t h e right 2 D r i l l t h e f i r s t 0 156...

Page 36: ...INn to pint22 use pad formerly occupied by zerohm jumper 2 from pad marked SWn to R1 use pad formerly occupied by zerohm jumper 3 from pad marked GNDW to pint2 or pint44 wire to zerohm jumper 4 from...

Page 37: ...uces t h e p o s s i b i l i t y of RF o v e r l o a d and f a l s e t r i g g e r i n g of t h e circuit The next s t a g e contains an active second order bandpass f i l t e r 5 kilohertz t o 100 k...

Page 38: ...y pass the signal until the control voltage directs the I switch to open the signal path and shunt the input of the op amp going to the PL Intercom lines to ground This scheme provides as much attenua...

Page 39: ...SEE S 0 1 6 I FOP CONNECTION TO T W I 5 1 0 D C U 3 U l i N E S S 3 Z oa L F 3 5 3 U Z C O 4 0 5 3 h E o R M C l A 0 5 3 B E 8 2 CAPACITANCE VALUES ARE SHOWN MICEOFARADf VOLTS I ALL RESISrDffi A P E C...

Page 40: ...TECHNICALMANUAL ModelTWI224 TWU22InterfaceUnits Assembly D i m P m S q u e l c h ModificationForIWI Sg70 DCU Layout RTS SystemsBurbank CA91506 FSCM 60572 TM3600 SecondEdition July1989 Page7 16...

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