1705A Spectrum Monitor Front Panel & 18V Supply | Tektronix

+5V	+5V	+5V
2	2	2	VIDEO	RESOLUTION
			FILTER	FILTER

VIDEO

DS112

RESOLUTION

DS129

DS144

FILTER

FILTER

INPUT

J303

ON

300 KHz

L BAND

DS112A

DS129A

DS144A

S109

S123

1

1

1

BANDWIDTH

1

1A

FILTER

BANDWIDTH

LED_ON

LED_300K

LED_LBAND

FILTER

2

1B

INPUT

3

2A

+5V

+5V

SPAN_UP

4

2B

6

6

INPUT

NC

5

3A

RESOLUTION

DS130

DS145

SPAN_DN

6

3B

FILTER

INPUT

S139

10 KHz

70 MHz

LED_1M

7

DS129C

DS144C

4A

5

5

INPUT

LED_100K

8

4B

LED_10K

LED_70M

LED_FULL

9

5A

LED_10M

10

5B

+5V

+5V

+5V

+5V

1

1

SPAN/DIV

SPAN/DIV

LED_LBAND

11

6A

2

6

0

4

LED_70M

12

6B

DS319

DS325

DS330

DS337

S345

S311

SPAN/DIV

SPAN/DIV

SPAN/DIV

SPAN/DIV

LED_300K

13

7A

100 KHz

DS319A

1 MHz

DS319C

10 MHz

DS319E

FULL

DS319G

SPAN_DN

SPAN_UP

1

5

9

1

LED_10K

14

7B

3

J303

LED_100K

LED_1M

LED_10M

LED_FULL

NC

15

8A

CONNECTS

TO J1

LED_ON

16

8B

A2

CFT

17

9A

<5>

FOCUS

18

9B

A3

SCALE

19

10A

MAIN

BOARD

S_SPD

20

10B

NOTE: OLD LED PART REFERENCE

R343

INTENS

21

11A

NUMBERS SILKSCREENED ON BOARD,

35.7K

AND IN PARTS LIST.

ROTATE

22

11B

H_POSN

23

12A

INTENS

R444

INTENS

R211

S_SPD

V_POSN

24

12B

20K

SWEEP

20K

SPEED

NC

25

13A

NC

26

13B

--- 11.8V

--- 11.8V

27

14A

NOT INSTALLED

+11.8V

+11.8V

+11.8V

+5V

28

14B

4

6

4

4

29

15A

VERTICAL

R528

V_POSN

R428

SCALE

R411

FOCUS

30

15B

POSITION

20K

SCALE

20K

FOCUS

20K

DS112B

DS112C

DS129B

DS144B

31

16A

3

5

3

3

+11.8V

32

16B

1

--- 11.8V

--- 11.8V

8

4

2

33

17A

+11.8V

+11.8V

+11.8V

--- 11.8V

34

17B

DS319B

DS319D

DS319F

10 TURN

3

7

1

1

HORIZONTAL

R511

H_POSN

TRACE

R419

ROTATE

CENTER

R235

CFT

POSITION

20K

ROTATION

20K

FREQUENCY

20K

--- 11.8V

--- 11.8V

A2 FRONT PANEL BOARD

GND

FROM J23

<4>

+40V

FROM J22

A3

MAIN

+40V

C497

BOARD

10UF

J698

W698

+15V

FROM J21

1

1

1

1

+15V

R494

CR494

C491

71.5

+40V

2

2

2

2

CR485

1UF

Q596

+15V

3

3

3

3

R690

C580

L591

L695

1

4

4

100UF

4

4

Q596

250UH

2W

100UH

R581

CR481

5

5

5

5

1.50K

Q481

CR594

R688

C690

R691

R692

R693

C697

R696

100UF

10UF

1K

R687

1.00K

3.01K

3.01K

3.01K

ON

OFF

1/2W

REAR

3.01K

B C E

PANEL

C581

.1UF

R485

R585

NC

475.0

475.0

Q588

LNB POWER

DS698

C583

2200PF

U583

S100

LNB POWER

R586

NE5561N

10.0K

Q482

5

1

NC

RC

VCC

+8.2V

2

VZ

OUT

7

R588

4

6

1.00K

E5

REAR

GAIN

SEN

C682

R681

PANEL

<1>

.1UF

10.0K

3

FB

GND

8

C684

C683

R587

+18V

.01UF

.01UF

1.00K

Q783

R680

R682

R686

C782

267.0K

+3.75V

56.2K

7.50K

10UF

R685

15.0K

A4 18V POWER SUPPLY BOARD

1705A SPECTRUM MONITOR

FRONT PANEL & 18V SUPPLY <6>

Image 208

Tektronix instruction manual 1705A Spectrum Monitor Front Panel & 18V Supply, A2 Front Panel Board

Contents

1705A Spectrum Monitor SN B040000 and Above 070-8222-08 Table of Contents Table of Contents InstallationTheory of Operation Checks and Adjustments 1705A Spectrum Monitor Iii Maintenance Options Replaceable Electrical Parts Replaceable Electrical PartsReplaceable Mechanical Parts 10-1 List of Figures Simulation of a 1705A Full SPAN/DIV display Considerations for custom installation of an instrument 1705A Spectrum Monitor Vii List of Tables Viii General Safety Summary General Safety Summary Service Safety Summary Service Safety Summary Xii Preface InstallationIntroduction Replaceable Mechanical Parts Preface Contacting TektronixUSA Preface Xvi Introduction Page Typical Configurations Section Introduction Accessories OptionsIntroduction #73 Safety Information Optional Accessories SPAN/DIV Spectrum DisplayFull Introduction Spectrum Display Power SourceCRT Display Introduction Environmental Characteristics Physical CharacteristicsCertifications and Compliances EMC Introduction Certifications and Compliances CAT Meters Applications SUN Satellite Earth Using the 1705A for Satellite Communication Band Input Signals Vancouver BC Seattle Portland Helena Boise SAN FranciscoLOS Angeles SAN Diego Zeroing in on a Satellite Tek 12.20 GHZ Horizontal Vertical Polarization Frequency and Number Down Link Transponder Looking at Exciters with the 70 MHz Input GHZ Miscellaneous Uses for the 1705A LNB OUT BandSplitter Input Operating Instructions Page Front-panel Controls and Indicators Section Operating Instructions Position Power Operating InstructionsFilter Input Display Variable control that adjusts the display brightness SPAN/DIV Rear- Panel Connectors Position Holder for the instrument’s mains fuse Spectrum Monitor Powering- up 1400 MHZ Measurement Graticule 1705A graticule scale Reading in dB Voltage Ratio Power Ratio Voltage Ratio Power RatioOperating Instructions DB Reference Reading in dB 75Ω 50Ω Operating Instructions DBm to v Conversion Reading in dBm MID Minimum Maximum FrequencyFrequency Scale = 10 Divisions Sweep Length = 12 Divisions 70 MHZ Center Frequency ReadoutMHZ 1400 MHZ Point on Trace That Corresponds to Center Frequency Tuned AT this Point Customizing Frequency Readout Readout Mode Offset AdjustMain Menu Readout Position 12.00 GHZ Basic Operating Procedure Locating Ku- Band Satellites City Satcom K2 G-STAR 1705A Spectrum Monitor Operating Instructions Page Page Installation Page Section Installation Electrical Installation Mechanical Installation InstallationLNB Power Band Input OFF Cabinet Options 250 875105 130 1700F02 portable cabinet dimensions Cabinetizing Cabinet Securing Screws A WFM7F05 with a blank front panel 1700F06 1700F07 1705A Spectrum Monitor Theory of Operation Page Section Theory of Operation Block DiagramOverview Theory of Operation Front Panel Diagram RF Input Diagram If Amplifier Diagram Resolution Filter and Log Detector Sweep Generator Diagram Start Display Deflection Amplifiers Diagram Vertical Deflection Amplifier Microprocessor Diagram Front Panel Diagram LOW Load Average High Load Low Voltage Power Supply Diagram Pulse Width Modulator Theory of Operation High Voltage Power Supply Diagram Axis Amplifier CRT The pinout for the CRT is shown in Figure Pinout of the CRT Socket 1705A Spectrum Monitor Theory of Operation Checks and Adjustments Page Recommended Equipment List Section Checks And AdjustmentsElectrical Instruments Auxiliary Equipment Checks and Adjustments SMA Male-to-bnc Female Adapter Short-Form ProcedurePerformance Check 1705A Spectrum Monitor Long Form Procedure Checks and Adjustments Preliminary Control Settings Page Marker Here Marker is +/-- 1 Minor Division from Here Checks and Adjustments 1705A Spectrum Monitor Page Variable Autotransformer L-BAND Input Disregard Marker Here Graticule Line UHF Sine Wave Generator Page End of the Performance Check Procedure Adjustment Procedure Short- Form Procedure Preliminary Setup Video SPAN/DIV Full Center Frequency Front A3 Main BDA1 PWR Sply BD Tek Shorting Remove the shorting strap 1705A Spectrum MonitorStrap 1705A Spectrum Monitor Page 1705A Spectrum Monitor Page 1705A Spectrum Monitor End of Adjustment Procedure Checks and Adjustments Maintenance Page Section Maintenance Cleaning Schottky Signal LOW Power SchottCmos ECL Troubleshooting Diagnostic Routines Nonvolatile 2444 RAM Test Reading Data Stored AT 60H to 7F in Processor Error Cannot Read or Write Press Input KEY to Exit Troubleshooting Aids Circuit board assembly locations Major Assembly Interconnection ROW B ROW a PIN Power Supply Troubleshooting Procedure Power Supply Fault Symptoms Maintenance Power Supply Fault Symptoms Low Volts Supply Maintenance Rectifier/Switcher Check High Volts Supply Maintenance High Volts Supply Fault Symptoms Focus Amplifier CheckAxis Amplifier Check Grid Drive Check High Voltage Oscillator Check CRT Voltage Check Corrective Maintenance Obtaining Replacement Parts Maintenance Test Selectable Components Mechanical Disassembly/AssemblyBezel Removal Graticule Light Removal and Replacement Removal of the CRT Replacing the CRT Removal of Front- Panel Assembly Removal of the Rear Panel Removing the L- Band Tuner Removal Replacement of the Main Board Removal Replacement of the Power Supply Board Removing the LNB Power Supply Board Front Repackaging 1705A Spectrum Monitor Options Page Field Upgrade Kits Power Cord OptionsPower Cord Options Description of power cord Section Options Ordering Replaceable Electrical Parts Page Section Replaceable Electrical Parts Using the Replaceable Electrical Parts ListParts Ordering Information Column Descriptions Tektronix Part NoColumn Column 3 Spectrum Control INC Weight ST Cross Index MFR. Code Number to ManufacturerAMP INC Fulling Mill Harrisburg PA MSD INC Orange ST DARLINGTON, SC Zman & Associates Sobudai Zawa Kanagawa 228 JapanChrome Shibaura Tokyo Japan 2ND Floor NEW Kyoei MINATO-KU Wilhelm Westerman Circuit BD Assypower SUPPLY, 1705A Circuit BD ASSY18V Power SupplyCircuit BD Assyfront Panel Circuit BD Assymain Board ASSY,1705A IAL,MI CAP,FXD,PLSTC100PF,5%,1600VDC/500VACIN,BULK CAP,FXD,CER DI470PF,20%,100V TUBULAR,MI LAMP,GLOW135V MAX,1.9MA,C2A-T,WIRE Lead A1DS1A1DS2 A1DS3 SQ,TOP Adjustbulk SQ,SIDE ADJUSTT&RRES,FXD,CMPSN1.5M OHM,5%,1W RES,FXD,CMPSN2.2M OHM,5%,0.5W RES,FXD,FILM5K OHM,0.1%,0.2W,TC=T9 IAL,T&R,SMALL BodyREELED,SMALL Body RES,FXDMETAL FILM,100K OHM,1%,0.2W,TC=100 SQ,TOP ADJUST,T&R WIRED,1705ARES,THERMAL5 OHM,10%,7A/DEG C RES,FXD,CMPSN2.4K OHM,5%,2W LED ASSYDIR1 Part of A2DS313CA ASSY,SP,ELEC34,26 AWG,5.0 L RES,VAR,PNLCP,20K OHM,20%,0.5W,LINEAR,W BUS,CNDCT PLATE,ELEC Shldcircuit BoardSHIELD,ELECCIRCUIT Board SHIELD,ELEC1705A,BRS CAP,FXD,ELCTLT33UF,+50-20%,35WVDC UVX1H330MAACAP,VAR,CER DI9-45PF,200V CAP,VAR,PLSTC1-3.5PF,500V CAP,FXD,MICA DI98PF,5%,500V A3CR1A3CR2 DIO,SIGFAST RCVRY70V,200MA,100NS,COM A3FL1 FLTR,BANDPASSA3FL2 A3FL3 COIL,RFFIXED,45NH COIL,RFFIXED,15NHCOIL,RFFIXED,64UH COIL,RFFIXED,505NH GF06UT 2K ADJUSTT&RRES NTWK,FXD,FI10K OHM,20%,9RES GF06UT 5K RES,FXD,FILM237K OHM,1%,0.2W,TC=T0 RES,FXD,FILM115K OHM,1%,0.2W,TC=T0RES,FXD,FILM3.4K OHM,1%,0.2W,TC=T0 RES,FXD,FILM7.5K OHM,1%,0.2W,TC=T0 RES,VAR,NONWWTRMR,250 OHM,20%,0.5W LIN RES,FXD,FILM1M OHM.1%,0.2W,TC=T0 PercentCRB20FXE1K62 CRB20FXE9K35 RES,FXD,FILM2.1K OHM,1%,0.2W,TC=T0 RES,VAR,NONWWTRMR,100 OHM,20%,0.5W LINRES,FXD,WW6.3K OHM,1%,3W CRB20FXE210E GF06UT 1K RES,FXD,FILM187K OHM,1%,0.2W,TC=T0 Loss 10DB,PKG 7.2MM SQ,6.8MM HIIC,CONVCMOS,A/D8-BIT,32US,SAR,DIFF IN,SER MICROCKT,DGTLMICROCOMPUTER,8 BIT IC,MISCCMOS,ANALOG Swquad SPST,100 IC,LINBIPOLAR,AMPLRF AMP,20DBIC,DGTLTTL,BFR/DRVRHEX INV, OC, HI MIXER,FREQ1-500MHZ CONN,BOXSHUNT/SHORTINGFEM,STR,1 X 2,0.1 CTR,0.385 H,30 GLD,BLK,JUMPERTAIL,30 GLD IAL,MI,T&R RES,FXD,FILM267K OHM,1%,0.2W,TC=T0 RES,FXD,WW1 OHM,5%,2WOrder by Desc RES,FXD,CMPSN1K OHM,5%,0.50W CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 7,0.15 CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 4,0.150CORE,EMTOROID,FERRITE COIL,RFFIXED,150NH A10SKT1 Controlled 0LUA3CONN,RF Plug CA ASSY,SP Replaceable Electrical Parts Diagrams/Circuit Board Illustrations Page Diagrams/Circuit Board Illustrations SymbolsAssembly Numbers Component ValuesPage 1705A Spectrum Monitor With cross-references to schematic diagrams 1, 2, 3, 4, A3 Main Board Component Locator A3 Main Board A5 70 MHz Tuner Board Schematic Diagram 1 Component Locator Chart Local Oscillator 1705A Spectrum Monitor RF Input Schematic Diagram 2 Component Locator Chart Resolution Filter & LOG Detector 1705A Spectrum Monitor If Amplifier Schematic Diagram 3 Component Locator Chart Band Linearity Ramp GeneratorMarker Generator Schematic Diagram 4 Component Locator Chart Deflection AmplifierFilter Buffers Schematic Diagram 5 Component Locator Chart 1705A Spectrum Monitor MicroprocessorMicroprocessor Trace Schematic Diagram 6 Component Locator Chart 1705A Spectrum Monitor Front Panel & 18V Supply A2 Front Panel Board A1 Power Supply Board Component Locator A1 Power Supply BoardSee Parts List for Effective Serial Number Ranges Switcher ErrorLine Rectifier Output Filters Schematic Diagram 8 Component Locator Chart A10 CRT Socket Board Front of Board Error AMP 1705A Spectrum Monitor High Volts Power SupplyHV OSC Grid DrivePage Replaceable Mechanical Parts Page Using the Replaceable Mechanical Parts List Section Replaceable Mechanical Parts Qty Column Replaceable Mechanical PartsThis indicates the quantity of mechanical parts used Indicates actual manufacturer’s part number Panduit Corp Ridgeland RichcoCHICAGO, IL Nelson Name Plate CO Casitas Circuit BD Assypower Supply See A1 Repl Mounting Parts COVER,HOUSINGALUMINUMFRAME,CRTBEZEL SCREW,MACHINE6-32 X 0.875,PNH,SST HOUSING,CKT Bdaluminum FRAME,CHASSISSAFETY ControlledSCREW,MACHINE6-32 X 0.188,PNH,STL IN/OUT See A6 Repl Mounting Parts Standard Accessories CLAMP,LOOP0.375 ID,PLASTIC,SAFETY CON TrolledStandard only Optional Accessories CA ASSY,CRTDISCRETE,ANODE LEAD,CRT,1,22 A10