Wavetek 75 - Page 120

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Main Page

Contents3
Table of Contents4
Product View7
Standard Features8
Specifications9
Standard Waveforms9
Operational Modes9
Sample Rate9
Output Signals10
Outputs10
Inputs10
Trigger Sources10
Waveform Characteristics11
Communication Ports11
Environmental Data11
Options11
Initial Preparation12
Electrical Installation12
Power Connection12
Line Voltage12
Fuse and Voltage Selection13
Reassembly13
Rear Chassis Assembly View13
Signal Connections14
Interface Connections14
Top and Bottom Cover Installation14
GPIB Address15
The RS-232-C Connectors15
Connecting the RS-232-C Interface16
Baud Rate Switch and DTE/DCE Connections16
Typical Examples of Serial Cables17
Initial Checkout Procedure18
RS-232-C DIP Switch Settings18
Test Equipment and Tools18
Checkout Procedure19
Equipment Interconnections26
Test Equipment Control Setups26
Controls, Connectors, and Indicators View29
Operation30
Controls, Connectors, and Indicators Description30
Liquid Crystal Display30
Edit Key30
Parameter Key32
Store Key32
Setup Key33
Control Knob34
Return Key34
Hold Key34
Trigger Key34
Counter Key35
Sync in (TTL) Connector35
F2 Key35
Return in (TTL) Connector35
Initial Setup36
Editing Waveforms36
Connectors36
Operation36
Thumbtacks and Cursor37
Rubber Band Editing37
Inserting Standard Waveforms37
Digital Amplitude37
3.1 0 Normalizing37
3.1 1 Digital Offset37
3.12 Point Editing38
Start and Stop Addresses40
Waveform Parameters40
Waveform Frequency, Perios, and Sample Frequency40
Waveform Amplitude41
Continuous Mode41
External Reference41
3.1 4.4 Waveform Offset41
3.1 5 Operational Modes41
3.1 5.2 Triggered Mode41
Gated Mode41
3.1 5.4 Toggled Mode41
Chained Operation42
Waveform Counter42
Return to Start42
Burst Mode42
3.1 6 Setting and Clearing Break Points42
Waveform Hold42
Low Battery Indicator43
Series Operation43
Parallel Operation43
GPIB Controls44
GPIB Address DIP Switches44
BUFFR Soft Key44
ADRS Soft Key44
Setup Menu Key44
LOCAL Soft Key44
Control Knob44
General Purpose Interface Bus (GPIB)45
GPIB Controls and Switches Diagram45
Bus Line Definitions46
GPIB Structure46
Handshake Sequence47
Listen Address47
Talk Address/Secondary Address47
Universal Commands47
Addressed Commands47
Model 75 GPIB Programming48
Addressed Commands48
Data Transfer48
General Programming Information48
Characters48
Action and Parameter Commands49
Action Commands49
Programming Parameters49
Sending Waveforms to the Model 7549
High Speed Binary Waveform Transfer50
Reading Waveforms from the Model 7550
Programming Reference Guide50
Errors - GPIB Reporting55
Class 1 Errors55
Class 2/3 Errors56
RS-232-C Controls56
Setup Menu Key56
Local Soft Key57
Hand Soft Key57
Baud Rate Switch57
General RS-232-C Information57
BUFFR Soft Key57
Control Knob57
Characters (RS-232-C)58
RS-232-C Terminators58
3.31.3 Action and Parameter Commands59
Action Commands59
Programming Parameters59
Errors - RS-232-C Reporting60
RS-232-C Interface Control Command60
Sending Waveforms to the Model 7560
Reading Waveforms from the Model 7560
Programming Reference Guide60
Class 1 Errors60
Class 2 Errors61
Circuit Description62
Signal Path62
Waveform Address Counter62
1 Introduction62
2 Detailed Circuit Description62
Waveform Address Selector63
Waveform Memory63
Two Consecutive Write Cycles to Waveform Memory64
Two Consecutive Read Cycles from Waveform Memory64
Waveform Latch65
Waveform Synthesizer66
Waveform DAC Functional Diagram66
Amplitude Control67
Offset Control67
Multiplying DAC Functional Diagram67
Output Amplifier68
Attenuator69
Shifted Logic Power Supply69
Z-Axis Driver69
Attenuator Range Switching69
Timing and Triggering70
Frequency Synthesizer70
PLL Switching and VCO Frequency70
Trigger and Hold Logic71
Frequency Ranging71
Mode Control71
Burst Counter72
Instrument Control73
Microprocessor73
Multiplexed Microprocessor Bus Timing74
Power On/Off Reset75
Address Decoder76
Microprocessor Address Map76
Main Memory77
Battery and Test Circuit77
Front Panel and Front Panel Interface77
Control Shift Register78
Communication Options79
Output Ports79
IEEE-488 (Option 001)79
Power Supply80
RS-232-C (Option 002)80
+5V Power Supply80
15V Power Supply80
75 Block Diagram81
Calibration82
Calibration Equipment Connection82
Scope82
Factory Repair82
Required Test Equipment82
Required Test Equipment83
Calibration Procedures83
Amplitude Verification84
Offset85
Frequency86
Offset Vertification Procedures86
Output Waveform Rise and Fall Time87
Frequency Verification87
Sum in88
Troubleshooting90
Isolating a Problem90
Factory Repair90
Before You Start90
Functional Circuit Guides91
Instrument Setup Common Errors91
Power Supply91
Microprocessor and Main Memory91
Troubleshooting Dynamic Digital Circuits92
Power Supply Voltages93
Power Supply Troubleshooting93
Frequency Synthesizer Troubleshooting93
Inner-Range Switching94
Trigger and Hold Logic Troubleshooting94
Waveform Address Counter Troubleshooting96
Waveform Memory Troubleshooting97
Waveform Latch Troubleshooting98
Waveform Synthesizer Troubleshooting99
Waveform Synthesizer Functional Check99
Amplitude Control Troubleshooting100
Offset Control Troubleshooting100
Output Amplifier Troubleshooting101
Attenuator Troubleshooting101
Burst Counter Troubleshooting102
Control Shift Register Troubleshooting103
Z-Axis Driver Troubleshooting103
Z-Axis Driver Functional Check103
Keyboard Troubleshooting104
Control Knob Troubleshooting104
Liquid Crystal Display Troubleshooting104
Microprocessor and Main Memory Troubleshooting105
Power off Reset Timing105
Power on Reset Timing106
Communication Option 001 Troubleshooting107
IEEE-488 Sample Check out Program107
Communication Option 002 Troubleshooting108
Baud Rate Generator Functional Check108
Troubleshooting Individual Components109
Operational Amplifier109
Logic Levels109
6.4.2 Diode109
Field Effect Transistor (FET)109
Capacitor109
Troubleshooting Block Diagram110
Parts List and Schematics111
Drawings111
7.2 Errata111
Ordering Parts111
Schematic Instrument112
Model 75 Arbitrary Waveform Generator Diagram113
Assembly Chassis Diagram114
Front Panel Schematic115
Front Panel - 75, Assembly Diagram116
PCA, Keyboard Board Diagram117
Rear Panel Assembly Diagram118
UPROC/ARB Board Schematic119
PCA, UPROC-ARB Diagram123
UPROC/ARB MEM Parts List124
Pll/Waveform Board Schematic125
PCA, Pll/Waveform Diagram129
PLL Waveform Board Assy Parts List130
Power Supply Assembly Diagram131
Power Supply Schematic133
PCA, Power Supply Diagram134
PCA, AC Primary Diagram135
IEEE-488 Option 001 Diagram136
GPIB Option Schematic137
PCA, GPIB Option Diagram138
RS-232-C Option 002 Diagram139
RS-232-C Option Schematic140
PCA, RS232 Option Diagram141
American Standard Code for Information Interchange (ASCII)142
Quick Reference Guide - Model 75143
Model 75 Remote Programming144

Wavetek 75 - Page 120

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