B5DM512Beltpack Transceiver

Telex Op er ating In struc tions PRO FES SIONAL WIRELESS IN TER COM SYS TEM TR-300, TR-300P, BTR-300, BTR-300B TA BLE OF CON TENTS IN TRO DUC TION..............................................................................................................................1 GEN ERAL DE SCRIP TION............................................................................................................1 BTR-300 BASE STATION TRANS CEIVER..................................................................................3 TECH NI CAL IN FOR MA TION......................................................................................................3 SPEC I FI CA TIONS..................................................................................................................3 FEA TURES..............................................................................................................................4 CON TROLS AND CON NEC TIONS..............................................................................................5 FRONT PANEL.......................................................................................................................5 REAR PANEL.........................................................................................................................6 TR-300 BELT-PACK TRANS CEIVER...........................................................................................9 TECH NI CAL IN FOR MA TION......................................................................................................9 SPEC I FI CA TIONS..................................................................................................................9 FEA TURES............................................................................................................................10 CON TROLS AND CON NEC TIONS............................................................................................10 EX TER NAL CON TROLS ...................................................................................................10 IN TER NAL CON TROLS.....................................................................................................12 EQUIP MENT SET-UP....................................................................................................................13 UN PACKING................................................................................................................................13 AN TENNA IN FOR MA TION........................................................................................................13 AN TENNA CON NEC TIONS...............................................................................................13 AN TENNA PO LAR IZA TION..............................................................................................14 DIS TANCE BE TWEEN AN TENNAS.................................................................................14 AN TENNA PLACE MENT...................................................................................................15 IM PROVING RE CEP TION/IN CREASING RANGE..........................................................16 BTR-300 SET-UP..........................................................................................................................17 LO CA TION............................................................................................................................17 IN TER NAL IN TER COM SWITCHES.................................................................................17 RACK MOUNTING..............................................................................................................19 LO CAL HEAD SET CON NEC TION....................................................................................21 HEAD SET MIC SE LECT SWITCH.....................................................................................21 TRANS MIT SWITCH...........................................................................................................21 IN TER CON NEC TION TO A HARD-WIRED IN TER COM...............................................22 AUX IL IARY AU DIO CON NEC TION.................................................................................23 POWER CON NEC TION.......................................................................................................23 DUMMY LOAD....................................................................................................................23 TR-300 SET-UP.............................................................................................................................24 HEAD SET CON NEC TION..................................................................................................24 DY NAMIC/ELECTRET MIC SWITCH..............................................................................24 BAT TERY IN STAL LA TION................................................................................................25 -i- TA BLE OF CON TENTS (CONT.) PRE-WALK-THRU CHECK LIST................................................................................................26 SYS TEM OP ER A TION..................................................................................................................27 BTR-300 OP ER A TION.................................................................................................................27 POWER..................................................................................................................................27 LO CAL HEAD SET VOL UME.............................................................................................27 PUSH TO TALK/LOCK TO TALK SWITCH......................................................................27 TR-300 OP ER A TION....................................................................................................................28 POWER...................................................…

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LPFCOMPAND LIMITER PREEMP MOD GERBER BY 8 DIVIDE MIXERVCOAMPAMPOUTPUTAMP MIC IN TR-300 BLOCK DIAGRAM 150-174 MHZ(PART 90) 174-216 MHZ(PART 74) 18.75-21.75 MHZ(PART 90) 21.75-27 MHZ(PART 74) TR-300 ACTIVE DEVICES DES DEVICE FUNCTION 1. Q1 SST175 Variable resistor 2. Q2 MMBT3906 Rectifier 3. Q3 SST177 Gate 4. Q4 VP0610 Switch 5. Q5 MMBFJ309 Oscillator 6. Q6 FMMT5179 Buffer 7. Q7 VP0610 Switch 8. Q8 MMUN2212 Switch 9. Q9 FMMT5179 Buffer 10. Q10 MMBR901 RF Power amplifier 11. U1 TLV2361 Amplifier 12. U2 NE575 Compandor 13. U3 78L05 Voltage regulator 14. U4 NE612 Oscillator/mixer 15. U5 UPB1509 Divide by eight

ID LABEL LOCATION

TR-300 OPERATIONAL DESCRIPTION Transmit Receive Signals from the receive antenna proceed through 3 tuned circuits, Q101, and 3 more tuned circuits to mixer Q103. Oscillator Q102 is a Colpitts with the collector tuned to the second harmonic. Y101 operates on the fifth overtone with C112 and L107 acting as mode suppressor. From the mixer the signal continues through FL101 to second mixer U101A. This downconverts the 10.7 MHz signal to 455 kHz. After passing through FL102, the signal is limited and detected by U101B. U101B contains a quadrature detector which is tuned by L109. U101C functions as a 16kHz bandpass filter for operating the squelch. With no signal a large amount of noise is present at U101 pin 11 and this is rectified by D101, lowering the voltage at pin 12 to less than .65 volt. This switches pin 14 to ground and mutes the audio. R122 adjusts the bias current through R121, R120 and D101 and is used to set the squelch point. De-emphasis is provided by R117,R125, and C128. U2A is an amplifier whose gain is controlled by the level of audio entering the rectifier at pin 4. As the level here increases, the gain is increased and this results in a 2:1 expansion characteristic, which reverses the processing done in the transmitter. R159 is the user volume control and U105 drives the headset.

770604.rep Bill of Materials PARTS LIST Quan Type Value Ref Designators ======================================================================== 1 1509 UPB1509 U5 1 575EC NE575 U2 1 612 NE612 U4 1 78LD 78L05 U3 1 8DA TLV2361 U1 6 C 100PF C10,C12,C16,C3,C6,C9 12 C .01UF C14,C26,C33,C35,C36,C37, C42,C47,C53,C55,C57,C58 3 C .1UF C2,C24,C27 1 C 47PF C31 1 C 68PF C32 4 C .001UF C34,C38,C48,C63 1 C 33PF C39 7 C * C40,C49,C51,C59,C60,C61, C62 1 C 4.7PF C41 1 C 1.5PF C44 06-Oct-99 10:50 Page 1 Bill of Materials 770604.S01 Page 1 770604.rep Quan Type Value Ref Designators ======================================================================== 1 C 8.2PF C45 2 C 2.2PF C46,C52 2 C 10PF C54,C56 1 C .0039UF C64 5 CE 10UF C1,C13,C21,C23,C30 13 CE 1UF C11,C15,C17,C19,C20,C25, C28,C29,C4,C5,C50,C7,C8 2 CE 100UF C18,C43 1 CE 4.7UF C22 6 D TMPD4148 D1,D3,D4,D5,D6,D8 1 DV FMMV105 D2 1 DV FMMV109 D7 7 E VAL E1,E2,E3,E4,E5,E6,E7 1 JH J1-1 J1 1 LA .47UH L2 2 LA 1.2UH L3,L6 06-Oct-99 10:50 Page 2 Bill of Materials 770604.S01 Quan Type Value Ref Designators ======================================================================== 4 LA * L4,L7,L8,L9 Page 2 770604.rep 1 LA .18UH L5 2 LVA VAL L1,L10 1 QN2212 MMUN2212 Q8 1 QNDSG MMBFJ309 Q5 1 QNEBC MMBR901 Q10 2 QNEBC FMMT5179 Q6,Q9 1 QPDSG SST175 Q1 1 QPDSG SST177 Q3 1 QPEBC MMBT3906 Q2 2 QPT VP0610 Q4,Q7 2 R 39.2K R1,R12 5 R 1K R10,R3,R48,R5,R6 2 R 4.7M R11,R14 06-Oct-99 10:50 Page 3 Bill of Materials 770604.S01 Quan Type Value Ref Designators ======================================================================== 2 R 22.1K R13,R21 2 R 976K R15,R32 3 R 47.5K R16,R30,R35 Page 3 770604.rep 2 R 30.1K R17,R18 7 R 10K R19,R2,R33,R39,R4,R49, R8 1 R 1.5K R20 1 R 15K R22 1 R 49.9K R23 1 R 3.01K R24 1 R 4.99K R25 4 R 100K R26,R31,R46,R9 3 R 3.92K R27,R28,R29 1 R 392 R34 4 R 100 R36,R41,R44,R52 3 R 221 R37,R42,R43 06-Oct-99 10:50 Page 4 Bill of Materials 770604.S01 Quan Type Value Ref Designators ======================================================================== 1 R 47.5 R38 1 R 4.75K R40 1 R 82.5K R45 2 R 475 R47,R50 1 R 10 R51 Page 4 770604.rep 1 R 5.62K R53 1 R 6.81K R7 1 RVA 100K VR1 1 RVA 5K VR2 1 SSD VAL S1 5 TP TP1,TP2,TP3,TP4,TP5 1 Y Y1 Total Parts: 167 06-Oct-99 10:50 Page 5 Page 5 TR300 TUNE-UP INFO Feed 1.5mv at 1kHz to J1-1(hot) and J1-2(gnd). Ground J1-8. Feed 9vdc to J1-11(+) and J1-10(-). Connect a frequency counter and modulation meter from pad E7 to ground. Connect a DC voltmeter to TP2. Set VR1 to maximum clockwise. Tune L1 and observe frequency counter and voltmeter. When loop is out of lock, the frequency will change but the loop voltage will be constant(about 3.3V). When the loop locks, the loop voltage will vary in an S curve either side of the unlocked value but the frequency will not change. Center the loop at this point by adjusting for the same loop voltage as existed in the unlocked condition. Adjust L10 for correct frequency. Adjust VR2 for +/- 3kHz deviation.

** 392 R34 .01UF C33 .001UF C34 .01UF C36 UPB1509 U5 4563 2 7 8 1 .001UF C38 1.2UH L6 MMBR901 Q10 10K R49 475 R50 10PF C56 1K R48 .18UH L5 100K R46 FMMT5179 Q9 10PF C54 100 R44 * C51 * L4 * C49 1.2UH L3 221 R42 .001UF C48 FMMT5179 Q6 4.75K R40 10K R39 2.2PF C46 47.5 R38 221 R37 .47UH L2 Q5 MMBFJ309 1.5PF C44 8.2PF C45 4.7PF C41 FMMV105 D2 47.5K R35 C59 * C60 * C61 * C62 * L7 * L8 * L9 * C58 .01UF R51 10 C53 .01UF R45 82.5K C55 .01UF R47 475 C40 * L1 100UF C43 + C42 .01UF C39 33PF R36 100 C47 .01UF R41 100 100PF C16 C27 .1UF R22 15K R21 22.1K MMBT3906 Q2 R20 1.5K R19 10K C26 .01UF 1UF C25 + 22.1K R13 C17 1UF + 30.1K R17 30.1K R18 C22 4.7UF + NE575 U2:C 16 11 1413 15 8 1220 G 10K 3.9K 10K U2:B NE575 2 1 3 R23 49.9K C18 100UF + C19 1UF + J1-1 R1 39.2K C2 .1UF S1 C3 100PF 1UF C4 + R4 10K TLV2361 U1 3 1 5 2 4 C6 100PF R5 1K VR1 100K U2:D NE575 19 18 17 C12 100PF R9 100K R10 1K C10 100PF C9 100PF R6 1K 1UF C7 + 10UF C13 + R11 4.7M C14 .01UF SST175 Q1 R14 4.7M R15 976K 1UF C20 + R16 47.5K 10UF C21 + D1 TMPD4148 J1-7 78L05 U3 GND OUT IN C24 .1UF C5 1UF + J1-6 NE575 U2:A 9 4 7 6 3.9K 10K10K G 5 10 6.81K R7 C11 1UF + J1-5 R12 39.2K 1UF C15 + E1 E2 1UF C8 + R8 10K E4 E3 J1-2 10UF C23 + R2 10K R3 1K 10UF C1 + U4 NE612 5 8 6 7 2 13 C37 .01UF C31 47PF C32 68PF R53 5.62K VR2 5K C28 1UF + C35 .01UF R52 100 D8 TMPD4148 Q8 MMUN2212 22K 22K 1UF C50 + R24 3.01K SST177 Q3 100K R26 4.99K R25 1UF C29 + R29 3.92K C64 .0039UF R28 3.92K R30 47.5K D7 FMMV109 R33 10K L10 10UF C30 + R27 3.92K Y1 D6 TMPD4148 221 R43 2.2PF C52 D3 TMPD4148 Q4 VP0610 C57 .01UF D5 TMPD4148 D4 TMPD4148 J1-8 E5 E6 R32 976K R31 100K E7 C63 .001UF TP1 TP2 TP3 TP4 TP5 Q7 VP0610 J1-10 J1-11 SBC 10/05/99 SBC10/05/99PRE-PRODUCTIONPA 770604 770604 TR-300 INTERNAL SIDETONE TRANSMITTED SIDETONE 3/15/99 TRANSMIT BOARD RB DEVIATION 6.8PF 5.6PF 4.7PF 6.8PF 5.6PF 4.7PF 15PF 12PF 15PF *FREQUENCY DEPENDENT COMPONENTS C49C51C59C60C61 195-216 MHZ 175-195 MHZ 150-175 MHZ C40 1.8PF 1.8PF NO PART 33PF 27PF 27PF 33PF 33PF 27PF 68NH68NH 100NH100NH 120NH120NH 150NH150NH L4L7L8L9C62 22PF 18PF 22PF56NH 47NH 56NH 47NH PUSH TO TRANSMIT 879239-(SMT) 879240-(T.H) NOTES: REVISIONS DESCRIPTIONLTRCHG NODATEAPPD UNSPECIFIED LIMITS OF TOLERANCE DECIMAL: .X .XX .XXX FRACTION: - MACHINED FINISH: 64 + - + oo - - + + + - INT. CLASS 2B THREADS- EXT. CLASS 2A AND INTERSECTIONS 90 o UNMARKED ANGLES, BENDS CONCENTRICITY .010 TIR FLATNESS .005 IN./1 IN. STRAIGHTNESS AND/OR ANGLES 1 : BENDS 2 APPLICATIONS SCALE CODE IDENT 57010 DWG.NO. DESIGNATOR MATERIAL: TITLE SIZE SHEET DATE DR BY CHK BY APPD. PROD ITEM USED ON NEXT ASSY. TELEX. nor duplicated without the written permission of Lincoln, NE., and shall not be released, disclosed, represents a proprietary product of TELEX, This drawing, written description or specification Lincoln Nebraska U.S.A TELEX COMMUNICATIONS INC. PART NO QTYDESCRIPTION = .010 IN = .030 IN = .050 IN 1234 SHEET REV STATUS REV SHT D O R TELEX