Tektronix 1705A manuály

Tektronix 1705A Uživatelský manuál (223 strany)

Značka: Tektronix | Kategorie: Zesilovače do auta | Velikost: 2.69 MB |

Angličtina

Tabulka s obsahem

Instruction Man ual

1

070-8222-08

1

Table of Contents

2

Installation

3

Theory of Operation

3

List of Figures

7

List of Tables

9

General Safety Summary

10

Symbols and Terms

11

Service Safety Summary

12

Contacting Tektronix

16

Section 1

20

Accessories

21

Safety Information

22

ELECTRICAL SPECIFICATION

23

APPLICATIONS

28

Satellite Footprints

29

L- Band Input Signals

31

Zeroing in on a Satellite

32

12.20 GHZ

33

TRANSPONDER

34

Finding The Correct

34

Transponder

34

Optimize Signal Strength

34

Looking at Exciters with

35

Operating Instructions

38

Section 2

40

Tektronix

41

Rear-Panel Connectors

43

SPECTRUM MONITOR

44

Powering- up

45

Measurement Graticule

46

Table 2- 1: dB Reference

47

v Conversion

48

Horizontal Scales

48

Center Frequency Readout

50

1400 MHZ

51

Customizing Frequency Readout

53

SPECTRUM

54

SPAN/DIV

54

Changing Readout

54

Frequency

54

12.00 GHZ

55

Locating Ku- Band Satellites

56

Section 3

64

Mechanical Installation

65

Cabinetizing

67

Cabinet Securing Screws

68

Rack Adapter

68

Custom Installation

71

Section 4

74

IF Amplifier Circuits

75

(Diagram 2)

75

Sweep Generator Circuits

75

(Diagram 3)

75

RF Input

77

Diagram 1

77

IF Amplifier

78

Diagram 2

78

Input Filter, Mixer, and IF

79

Amplifier

79

Resolution Filter and Log

79

Detector

79

Sweep Generator

80

Diagram 3

80

Bright- Up Generator

81

Deflection Amplifiers

82

Diagram 4

82

Vertical Deflection

83

Horizontal Deflection

83

Microprocessor

84

Diagram 5

84

Front Panel

85

Diagram 6

85

+18 Volt Supply

86

Low Voltage Power Supply

87

Diagram 7

87

Line Rectifier and Filter

88

Pulse Width Modulator

88

High Voltage Power Supply

90

Diagram 8

90

Power Supply Outputs

91

Focus Amplifier

91

Grid Drive Circuit

91

Z-Axis Amplifier

91

Section 5

96

Checks And Adjustments

96

Auxiliary Equipment

97

Performance Check

98

Long Form Procedure

100

Checks and Adjustments

101

1705A Spectrum Monitor

101

UHF SINE

109

GENERATOR

109

Adjustment Procedure

112

A1 PWR SPLY BD

114

A3 MAIN BD

114

SHORTING

116

End of Adjustment Procedure

122

Maintenance

124

Section 6

126

Visual Inspection

127

Static- Sensitive

127

Components

127

TROUBLESHOOTING

128

Diagnostic Routines

129

2444 TEST GOOD

131

PRESS [INPUT] KEY TO EXIT

131

ERROR : CANNOT READ OR WRITE

132

DAC Test

132

Troubleshooting Aids

133

Parts Lists

134

Major Assembly

135

Interconnection

135

General Troubleshooting

135

Techniques

135

Introduction

137

Low Volts Supply

138

High Volts Supply

140

Focus Amplifier Check

141

Z-Axis Amplifier Check

141

Grid Drive Check

141

High Voltage Oscillator Check

142

CRT Voltage Check

142

CORRECTIVE MAINTENANCE

143

Obtaining Replacement Parts

143

Bezel Removal

144

Graticule Light Removal

145

Removal of the CRT

146

Replacing the CRT

146

Removal of the Rear Panel

147

Removal of Front- Panel

147

Assembly

147

Removing the L- Band

148

Removing the 70 MHz

149

Removal and

149

Replacement of the Main

149

Replacement of the Power

150

Supply Board

150

Removing the LNB Power

151

REPACKAGING

152

Section 7

156

ORDERING

157

Replaceable Electrical Parts

158

Section 8

160

Column Descriptions

161

1705A Spectrum Monitor 8-3

162

8-4 1705A Spectrum Monitor

163

1705A Spectrum Monitor 8-5

164

8-6 1705A Spectrum Monitor

165

1705A Spectrum Monitor 8-7

166

8-8 1705A Spectrum Monitor

167

1705A Spectrum Monitor 8-9

168

8-10 1705A Spectrum Monitor

169

1705A Spectrum Monitor 8-11

170

8-12 1705A Spectrum Monitor

171

1705A Spectrum Monitor 8-13

172

8-14 1705A Spectrum Monitor

173

1705A Spectrum Monitor 8-15

174

8-16 1705A Spectrum Monitor

175

1705A Spectrum Monitor 8-17

176

8-18 1705A Spectrum Monitor

177

1705A Spectrum Monitor 8-19

178

8-20 1705A Spectrum Monitor

179

1705A Spectrum Monitor 8-21

180

8-22 1705A Spectrum Monitor

181

1705A Spectrum Monitor 8-23

182

8-24 1705A Spectrum Monitor

183

1705A Spectrum Monitor 8-25

184

8-26 1705A Spectrum Monitor

185

1705A Spectrum Monitor 8-27

186

8-28 1705A Spectrum Monitor

187

1705A Spectrum Monitor 8-29

188

8-30 1705A Spectrum Monitor

189

Component Values

192

Assembly Numbers

192

Grid Coordinates

192

A3 Main Board

196

A5 70 MHz Tuner Board

196

3, 4, and 5

197

1705A SPECTRUM MONITOR

198

70 MHz INPUT

198

LOCAL OSCILLATOR

198

10 KHz FILTER

200

IF AMPLIFIER <2>

200

PART OF A3 MAIN BOARD

204

1, 2, 3, and 4

205

MICROPROCESSOR <5>

206

Assembly A2 and A4

207

A4 18V Power Supply Board

207

A2 Front Panel Board

207

A1 Power Supply Board

209

PART OF A1 POWER SUPPLY

210

Assembly A10

211

V1 TUBE SOCKET

212

VISUAL AID

212

A10 CRT SOCKET BOARD

212

Replaceable Mechanical Parts

214

Section 10

216

1705A Spectrum Monitor 10- 3

218

10- 4 1705A Spectrum Monitor

219

1705A Spectrum Monitor 10- 5

220

10- 6 1705A Spectrum Monitor

221

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