SD-160 Series Data Radio

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RF B’D Schematic for <strong>SD</strong>-171 (Reserved)88
RF B’D Schematic for <strong>SD</strong>-174 (Reserved)89
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TABLE OF CONTENTS1. INTRODUCTION...
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2. TECHNICAL SPECIFICATIONSGENERALV
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RECEIVERVHFUHFModel Series : SD-161
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Scan DeleteTo temporarily delete a
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of DB-15 connector, respectively. I
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RF BoardPre-SelectorAFRSSIIF ICTA31
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Two-Tone Squelch(SQ) SystemThe radi
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1. Channel Change 0x64 0x?? :Curren
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STATUS DESCRIPTION LED COLOR AUDIBL
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Channel Space DTE Baud Rate Modem B
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adjusted (amplified) by IC416-B. Th
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CHANNEL SELECTOROne of 16 channels
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DC TO DC CONVERTERThe DC to DC conv
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to the base of Q601 serving as an R
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4.5. ACC-514 (FFSK MODEM CIRCUITS)M
Page 34 and 35: 5. MAINTENANCE AND REPAIRGENERALAny
Page 36 and 37: 3. Unscrew the two mounting screws
Page 38 and 39: 6. COMPONENT REPLACEMENTSurface Mou
Page 40 and 41: 7. ALIGNMENT PROCEDUREThe UHF/VHF T
Page 42 and 43: 7.2. TRANSMITTERConnect the unit to
Page 44 and 45: 11. Adjust the RF signal to the des
Page 46 and 47: DB9-Modular cable15 - 15 ConnectorS
Page 48 and 49: 8 Serial data IN(RXD)9 Speaker filt
Page 50 and 51: 8.4. Option board pin-out chart8.4.
Page 52 and 53: 8.5. Wiring DiagramCON401PIN# DESCR
Page 54 and 55: STARTVERY LOWORNO 12DB SINADNOISE A
Page 56 and 57: STARTVISUALCHECK OFTHE BOARDOK?YESN
Page 58 and 59: LOW OR NO POWERAT INPUT TO P.A.RF P
Page 60 and 61: 10. VOLTAGE CHARTTRANSISTORS OF CON
Page 62 and 63: ICS OF DIGITAL BOARDRECEIVE MODEPIN
Page 64 and 65: MCU (IC401)RECEIVE MODEPIN # Voltag
Page 66 and 67: PART NO. NAME & DESCRIPTION REF PAR
Page 72 and 73: 11.2. PARTS LIST FOR SD-164PART NO.
Page 80 and 81: BASE DIAGRAMMANUFACTURER’SPART NU
Page 82 and 83: BASE DIAGRAMMANUFACTURER’SPART NU
Page 93: 14. CIRCUIT B’D DETAILSThis chapt
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SD-160 Series Data Radio

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