Resolution Filter & LOG Detector | Tektronix 1705A manual

FL2 VISUAL AID

TOP VIEW

11

9

7

TOP VIEW

+11.8V

T1

1

6

U25

1

4

5

VISUAL AID

2

5

TOP VIEW

R136

VR3

150.0

3

4

2

4

6

8

6.2V

NOTE: PINS 13--- 16 ARE THE MOUNTING

C31

PINS FOR THE PART.

TEST

.01UF

C32

TEST

G2

ONLY

<1>

4700PF

ONLY

4

FL2

1

3

5

7

P6

P5

136--- BPF

T--- 1907

13

15

10.7MHz IF

T1

GND

N

GND

J6

J5

1

6

C

U22

R201

14

16

1 2

3 4

1 2 3 4

GND

GND

C33

NE5205

C34

C35

267.0

2

5

U25

R145

1

8

50 OHM

.01UF

.01UF

.01UF

SBL--- 1

17.4

3

4

1

7

2

7

IN

OUT

C

C

C

1

3

5

7

1

2

3

FL1 VISUAL AID

R146

R141

3 4 5 6

R137

130 MHz

1

TOP VIEW

+11.8VF

301.0

301.0

221.0

IF TUNING

9

5

C54

1

.001UF

12

10

9

8

2

4

6

8

20dB GAIN

R173

U28

Q12

750.0

L18

24NH

VISUAL AID

2

6

TOP VIEW

75 OHM

2

4

6

8

C101

C50

NOTE: PINS 13--- 16 ARE THE MOUNTING

12PF

1PF

+11.8VF

PINS FOR THE PART.

R164

120 MHz

28.0

BUFFER

1

C55

R181

Q13

1

3

5

7

FL1

75.0

R153

+11.8V

0

1--- 3.5PF

301.0

C39

C85

15

GND

N

GND

13

L17

.001UF

50 OHM

.001UF

+6dBM

360NH

C

360 MHz

16

14

R169

C63

GND

GND

C60

TRIPLER

28.0

C42

Y2

200PF

200PF

TUNING

Q11

L16

6

12

L6

15PF

119.8MHZ

OUT

IN

505NH

130 MHz

45NH

2

4

6

8

C

C

C

BUFFER

50 OHM

3

2

1

L4

C43

R166

75 OHM

U28

C59

.141--- .159UH

C41

470PF

17.4

8

9

2

470PF

R163

47PF

R174

SBL--- 1X

R206

R207

U31

FREQ

2.21K

2.10K

C72

4

C71

C61

243.0

243.0

ADJUST

MAR--- 4

R170

680PF

680PF

1

3

5

7

TRIPLER

33UF

R165

R154

3

1

OUTPUT TUNING

R187

806.0

301.0

301.0

243.0

2

TEST SELECTABLE

--- 11.8V

RANGE = 2.21K--- 3.32K

R182

C51

C36

100.0

.001UF

33UF

L11

L12

G5

15NH

15NH

<1>

480--- IF

--- 11.8V

C69

SHIELD

1--- 5.4PF

590 MHz

W13

6.3CM

NOTCH

+11.8V

R156

+11.8V

RESOLUTION FILTER & LOG DETECTOR

+11.8V

+11.8V

U23F

10.0K

7406

R149

10.0K

13

12

C2

Q9

L7

R219

R208

R172

15.0K

14.7K

<4>

210UH

+11.8V

C74

100.0

.1UF

LOG

--- 20dBm MAX

R155

L3

C48

C53

P10

TEST

R218

C88

3.32K

R171

.1UF

.1UF

ONLY

R202

R203

Q25

10.0K

200PF

210UH

100.0

J10

243.0

243.0

H2

<5>

300 KHz

4 3 2 1

Q24

--- 11.8V

GAIN

U29

C47

C46

4

/10KHz

C58

MAR--- 4

.1UF

.1UF

CR23

CR28

.01UF

1

3

R222

R175

15.0K

+5V

+11.8V

C68

C70

C73

CR26

100

CR27

.01UF

.01UF

.01UF

2

--- 11.8V

R138

R157

SHIELD

SHIELD CAN 202--- 0196--- 01

10.0K

10.0K

+11.8V

L14

U23E

U23D

1.95UH

U32

R150

7406

7406

MC13055

10.0K

FL3

FL4

11

10

9

5

12

8

Q10

LMTR IN

METER

R183

L8

100.0

210UH

C87

R196

L15

6

LMTR BIAS

98PF

11

NC

340.0

64UH

C82

DET OUT

.047UF

NC

R167

10 KHz FILTER

C57

C56

7

LMTR BIAS

DET OUT

10

3.32K

.1UF

L2

.1UF

R147

C83

100.0

210UH

.047UF

C100

NC

9

QUAD IN

+COMP

15

NC

.001UF

--- 11.8V

NC

8

14

NC

QUAD BIAS

--- COMP

+5V

C38

C37

C44

C45

Y3

Y4

C66

C67

.1UF

.1UF

40PF

40PF

4

IF VCC

CR22

33PF

10.7MHZ

10.7MHZ

33PF

CR30

C81

2

COMP VCC

DATA OUT

16

NC

.01UF

3

IF GND

L1

CR25

L5

C52

C62

C64

L9

CR29

L10

NC

1

13

NC

210UH

1.95UH

9--- 45PF

5--- 25PF

9--- 45PF

1.95UH

210UH

COMP GND

CARRIER

R148

R195

681.0

681.0

10 KHz FILTER ADJUST

PART OF A3 MAIN BOARD

1705A SPECTRUM MONITOR

IF AMPLIFIER <2>

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com

Image 200

Tektronix instruction manual Resolution Filter & LOG Detector, 1705A Spectrum Monitor If Amplifier

Contents

1705A Spectrum Monitor SN B040000 and Above 070-8222-08 Table of Contents Theory of Operation InstallationTable of Contents Checks and Adjustments 1705A Spectrum Monitor Iii Maintenance Options Replaceable Mechanical Parts 10-1 Replaceable Electrical PartsReplaceable Electrical Parts 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 Introduction InstallationPreface Replaceable Mechanical Parts USA Contacting TektronixPreface Preface Xvi Introduction Page Typical Configurations Section Introduction Accessories OptionsIntroduction #73 Safety Information Optional Accessories Full Spectrum DisplaySPAN/DIV CRT Display Power SourceIntroduction Spectrum 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 Frequency Scale = 10 Divisions Sweep Length = 12 Divisions Minimum Maximum FrequencyMID MHZ Center Frequency Readout70 MHZ 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 Overview Block DiagramSection Theory of Operation 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 Electrical Instruments Section Checks And AdjustmentsRecommended Equipment List Auxiliary Equipment Performance Check Short-Form ProcedureChecks and Adjustments SMA Male-to-bnc Female Adapter 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 A1 PWR Sply BD A3 Main BDFront Tek Strap Remove the shorting strap 1705A Spectrum MonitorShorting 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 Bezel Removal Mechanical Disassembly/AssemblyMaintenance Test Selectable Components 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 Parts Ordering Information Using the Replaceable Electrical Parts ListSection Replaceable Electrical Parts 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 RES NTWK,FXD,FI10K OHM,20%,9RES ADJUSTT&RGF06UT 2K GF06UT 5K RES,FXD,FILM3.4K OHM,1%,0.2W,TC=T0 RES,FXD,FILM115K OHM,1%,0.2W,TC=T0RES,FXD,FILM237K 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 See Parts List for Effective Serial Number Ranges A1 Power Supply BoardA1 Power Supply Board Component Locator 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