Boonton 1121A Manuel utilisateur

INSTRUCTION MANUAL

MODEL 1121A

PROGRAMMABLE

AUDIO ANALYZER

REVDATE05/16

MANUAL P/N98407600A

WirelessTelecom Group

25 EASTMANS ROAD, PARSIPPANY, NJ 07054

Telephone: 973-386-9696

Fax:973-386-9191

Email: boonton@boonton.com

Web:www.wtcom.com

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SAFETY SUMMARY

The following general safety precautions must be observed during all phases of operation and maintenance of this

instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates

safety standards of design, manufacture, and intended use of the instrument. Boonton Electronics assumes no liability

for the customer’s failure to comply with these requirements.

THE INSTRUMENT MUST BE GROUNDED

To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground. The

instrument is equipped with a three conductor, three prong power cable. The power cable must either be plugged into

an approved three-contact electrical outlet or used with a three-contact to a two-contact adapter with the (green)

grounding wire firmly connected to an electrical ground at the power outlet.

DO NOT OPERATE THE INSTRUMENT IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes.

KEEP AWAY FROM LIVE CIRCUITS

Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be

made by qualified maintenance personnel. Do not replace components with the power cable connected. Under certain

conditions dangerous voltages may exist even though the power cable was removed; therefore, always disconnect

power and discharge circuits before touching them.

DO NOT SERVICE OR ADJUST ALONE

Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is

present.

DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT

Do not install substitute parts or perform any unauthorized modification of the instrument. Return the instrument to

Boonton Electronics for repair to ensure that the safety features are maintained.

SAFETY SYMBOLS

This safety requirement symbol (located on the rear panel) has been adopted

by the International Electrotechnical Commission, Document 66 (Central

Office) 3, paragraph 5.3, which directs that the instrument be so labeled if, for

the correct use of the instrument, it is necessary to refer to the instruction

manual. In this case it is recommended that reference be made to the

instruction manual when connecting the instrument to the proper power

source. Verify that the correct fuse is installed for the power available, and

that the switch on the rear panel is set to the applicable operating voltage.

The CAUTION sign denotes a hazard. It calls attention to an operation

procedure, practice, or the like, which, if not correctly performed or adhered

to, could result in damage to or destruction of part or all of the equipment. Do

not proceed beyond the CAUTION sign until the indicated conditions are

fully understood and met.

The WARNING sign denoted a hazard. It calls attention to an operation

procedure, practice, or the like, which, if not correctly performed or adhered

to, could result in injury or loss of life. Do not proceed beyond a WARNING

sign until the indicated conditions are fully understood and met.

Indicates dangerous voltages.

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Table of Contents

Paragraph Page

SECTION I - GENERAL INFORMATION

1-1. INTRODUCTION ...................................................................................................................1-1

1-3. DESCRIPTION ......................................................................................................................1-1

1-5. ACCESSORIES.....................................................................................................................1-1

1-7. OPTIONS .............................................................................................................................1-1

1-9. SPECIFICATIONS.................................................................................................................1-1

SECTION II - INSTALLATION

2-1. INTRODUCTION ...................................................................................................................2-1

2-3. UNPACKING ........................................................................................................................2-1

2-5. MOUNTING ...........................................................................................................................2-1

2-7. POWER REQUIREMENTS ...................................................................................................2-1

2-10. CABLE CONNECTIONS ....................................................................................................2-1

2-13. PRELIMINARY CHECK.......................................................................................................2-2

SECTION III - OPERATION

3-1. INTRODUCTION ...................................................................................................................3-1

3-3. OPERATING CONTROLS, INDICATORS AND CONNECTIONS........................................3-1

3-5. OPERATING INSTRUCTIONS..............................................................................................3-1

3-7 INITIAL CONDITIONS............................................................................................................3-1

3-9. LOCAL OPERATION.............................................................................................................3-1

3-10. Function Selection ...............................................................................................................3-1

3-11. Data Entry Operation...........................................................................................................3-1

3-13. Analyzer Measurement Description.....................................................................................3-6

3-14. Analyzer Input Description...................................................................................................3-6

3-15. Frequency Measurement Function......................................................................................3-6

3-16. Frequency Measurement Display Units...............................................................................3-6

3-17. Special Frequency Measurement Modes............................................................................3-6

3-18. Level Measurement Function .............................................................................................3-6

3-19. Level Measurement Display Units.......................................................................................3-6

3-20. Special Level Measurement Modes ...................................................................................3-6

3-21. Distortion Measurement Function........................................................................................3-6

3-22. Distortion Measurement Display Units ............................................................................. 3-6

3-23. Special Distortion Measurement Modes..............................................................................3-9

3-24. SINAD Measurement Function............................................................................................3-9

3-25. SINAD Measurement Display Units.....................................................................................3-9

3-26. Special SINAD Measurement Modes..................................................................................3-9

3-27. S/N Measurement Function.................................................................................................3-9

3-28. S/N Measurement Display Units..........................................................................................3-9

3-29. Special S/N Measurement Modes.......................................................................................3-9

Paragraph Page

3-30. Using the Ratio Mode ..........................................................................................................3-9

3-31. Ratio Measurement Display Units ......................................................................................3-9

3-32. Using Analyzer Filters........................................................................................................3-10

3-35. Audio Oscillator General Description.................................................................................3-10

3-36. Oscillator Output Description.............................................................................................3-11

3-37. Source Frequency Display and Selection..........................................................................3-11

3-38. Source Frequency Lock Mode Description........................................................................3-11

3-40. Source level Display and Selection ..................................................................................3-11

3-41. Amplitude Display Units.....................................................................................................3-11

3-42. Step Size and Step Key Operation....................................................................................3-12

3-43. Increment/Decrement Program Number ..........................................................................3-12

3-44. Increment/Decrement Frequency Values ........................................................................3-12

3-45. Increment/Decrement Level Values...................................................................................3-12

3-46. Sweep Mode General Description.....................................................................................3-12

3-47. SWEEP Key Description ..................................................................................................3-12

3-48. START Key Description.....................................................................................................3-12

3-49. STOP Key Description.......................................................................................................3-12

3-50. X AXIS Output Description ...............................................................................................3-12

3-51. Y AXIS Output Description ...............................................................................................3-12

3-53. PEN Output Description ...................................................................................................3-12

3-54 Using The Sweep Mode ....................................................................................................3-13

3-56. Generating Frequency Sweeps.........................................................................................3-13

3-57. Generating Level Sweeps ................................................................................................3-13

3-58. Program Store and Recall Description .............................................................................3-13

3-59. Store Operation ................................................................................................................3-13

3-60. Recall Operation................................................................................................................3-13

3-61. Program Memory Initialization ...........................................................................................3-13

3-62. Special Function Description.............................................................................................3-13

3-63. Option Switch Functions....................................................................................................3-13

3-64. Mode Alteration Function...................................................................................................3-14

3-70. Calibration and Test Functions ........................................................................................3-18

3-71. S/N Delay Functions..........................................................................................................3-18

3-72. Frequency Sweep Resolution Functions...........................................................................3-18

3-73. Sweep Rate Functions .....................................................................................................3-18

3-74. AC Detector Selection Functions.......................................................................................3-18

3-75. Source Impedance Selection Functions............................................................................3-18

3-76. dBV/dBm Display Mode Functions ....................................................................................3-18

3-77. Option Switch, A4S1, Operation........................................................................................3-18

3-79. Error Codes ......................................................................................................................3-18

3-80. REMOTE OPERATION ....................................................................................................3-18

3-82. Setting the Bus Address ...................................................................................................3-18

3-83. Entering the Remote Mode................................................................................................3-18

3-84. Returning to Local Mode ..................................................................................................3-21

3-85. Triggered Operation...........................................................................................................3-21

3-86. Talk Operation ..................................................................................................................3-21

3-87. Talk Status (TS) Mode.......................................................................................................3-21

3-88. Talk Value (TV) Mode ......................................................................................................3-21

3-89. Talk Program (TP) Mode ..................................................................................................3-21

3-90. Talk Function (TF) Mode ...................................................................................................3-21

3-91. Talk Learn (TL) Mode .......................................................................................................3-21

3-92. Talk Burst (TB) Mode.........................................................................................................3-21

3-93. End-Of-String (EOS) Control.............................................................................................3-22

3-94. Using “Service Request” (SRQ) .......................................................................................3-22

3-95. Bus Command Responses................................................................................................3-22

III

Paragraph Page

3-96. Program Function Mnemonics...........................................................................................3-22

3-97. Number Formatting............................................................................................................3-22

3-98. Data String Format ...........................................................................................................3-22

3-99. Data String Errors..............................................................................................................3-23

3-100. Data String Examples......................................................................................................3-23

3-101. Store and Recall Operation ............................................................................................3-23

SECTION IV - THEORY OF OPERATION

4-1. INTRODUCTION ...................................................................................................................4-1

4-3. FUNCTIONAL BLOCK DIAGRAM.........................................................................................4-1

4-14. DETAILED CIRCUIT DESCRIPTION ................................................................................4-3

4-15. A11 Power Supply Circuits .................................................................................................4-3

4-20. A10 Motherboard Circuits....................................................................................................4-5

4-23. A5 CPU Circuits...................................................................................................................4-5

4-31. A12 Display and A13 Keyboard Circuits..............................................................................4-7

4-35. A4 Frequency Counter Circuits ..........................................................................................4-7

4-44. A0 Input Circuits .................................................................................................................4-8

4-51. A1 Filter Circuits .................................................................................................................4-9

4-55. A2 Notch Filter Circuits......................................................................................................4-10

4-61. A3 Detector Circuits...........................................................................................................4-11

4-68. A6 Source Circuits.............................................................................................................4-13

4-76. A7 Output Circuits ............................................................................................................4-14

SECTION V - MAINTENANCE

5-1. INTRODUCTION ...................................................................................................................5-1

5-3. SAFETY REQUIREMENTS...................................................................................................5-1

5-5. REQUIRED TEST EQUIPMENT ..........................................................................................5-1

5-7. CLEANING PROCEDURE ...................................................................................................5-1

5-9. REMOVAL AND REPLACEMENT.........................................................................................5-1

5-10. Instrument Covers ..............................................................................................................5-1

5-11. Display/Keyboard Access.................................................................................................. 5-1

5-12. Plug-in Circuit Board............................................................................................................5-3

5-13. Optional Filters ...................................................................................................................5-3

5-14. Firmware Integrated Circuit .............................................................................................. 5-4

5-15. Component Removal...........................................................................................................5-4

5-16. INSPECTION.......................................................................................................................5-4

5-18. PERFORMANCE TESTS ...................................................................................................5-5

5-20. Initial Calibration ................................................................................................................ 5-5

5-21. Analyzer DC Level Accuracy ..............................................................................................5-5

5-22. Analyzer AC Level Accuracy ...............................................................................................5-5

5-23. Analyzer Level Flatness .....................................................................................................5-6

5-25. Source Impedance Accuracy...............................................................................................5-6

5-26. Source Level Accuracy........................................................................................................5-6

5-28. Source Level Flatness .........................................................................................................5-6

5-31. Analyzer Low Level AC Accuracy........................................................................................5-7

5-32. Frequency Accuracy............................................................................................................5-7

5-33. Source Frequency Accuracy................................................................................................5-7

5-34. Analyzer Frequency Accuracy........................................................................................... 5-7

5-35. Low-Pass Filter Accuracy ...................................................................................................5-8

Paragraph Page

5-37. Residual Distortion and Noise ............................................................................................5-8

5-39. Residual Signal-to-Noise Ratio............................................................................................5-8

5-41. Common Mode Rejection Ratio...........................................................................................5-8

5-42. Optional Filter Accuracy.......................................................................................................5-8

5-43. Optional Filter Test Connections .........................................................................................5-8

5-44. 400 Hz High-Pass Filter Accuracy.....................................................................................5-10

5-45. AUDIO Band-Pass Filter Accuracy....................................................................................5-10

5-46. CCITT Filter Accuracy ......................................................................................................5-10

5-47. CCIR Filter Accuracy ........................................................................................................5-10

5-48. A, B, and C Weighting Filter Accuracy ............................................................................ 5-10

5-49. C-MESSAGE Filter Accuracy ...........................................................................................5-10

5-50. ADJUSTMENTS ................................................................................................................5-23

5-52. A11 Power Supply Adjustment .........................................................................................5-23

5-54. A11R6 Power Fail Adjustment...........................................................................................5-23

5-55. A5 CPU Adjustment...........................................................................................................5-24

5-57. A5Y1 Timebase Frequency Adjustment ..........................................................................5-24

5-58. A3 Notch Board Adjustment .............................................................................................5-24

5-59. A3R57 Balance and A3R58 Tune Adjustments ...............................................................5-24

5-60. A0 Input Board Adjustments..............................................................................................5-24

5-62. A0R29, A0R12, A0R7 and A0C35 CMRR Adjustments....................................................5-24

5-63. A0C5 and A0C32 Flatness Adjustments ...........................................................................5-25

5-64. A0C10 and A0C33 Flatness Adjustments.........................................................................5-25

5-65. A7 Output Board Adjustments ..........................................................................................5-25

5-66. A7R21, A7R17, and A7R15 Adjustments ........................................................................5-25

5-67. A6 Source Board Adjustments...........................................................................................5-25

5-68. A5R23 Output Level Adjustment ......................................................................................5-25

5-69. A37 CCIR, CCIR/ARM Filter Board Adjustment ..............................................................5-26

5-71. A37R11 CCIR Cal Adjustment......................................................................................... 5-26

5-72. TROUBLESHOOTING .....................................................................................................5-26

5-76. TROUBLE LOCALIZATION...............................................................................................5-26

5-78. Special Diagnostic Function Codes...................................................................................5-26

5-79. DAC Test Code..................................................................................................................5-26

5-82. Counter Plug-in Board Test ..............................................................................................5-27

5-83. Input and Filter Plug-in Board Test ..................................................................................5-27

5-84. Notch and Detector Plug-in Board Test ...........................................................................5-27

5-85. PREPARATION FOR SHIPMENT ...................................................................................5-27

5-86. Use of Shipping Case or Containers ................................................................................5-27

5-87. Packaging..........................................................................................................................5-27

5-88. Storage ..............................................................................................................................5-27

SECTION VI - PARTS LIST

6-1. INTRODUCTION ...................................................................................................................6-1

SECTION VII - SCHEMATIC DIAGRAMS

LIST OF TABLES

Table Page

TABLE 1-1. PERFORMANCE SPECIFICATIONS.......................................................................1-2

TABLE 1-1. PERFORMANCE SPECIFICATIONS CONTINUED ...............................................1-3

TABLE 1-1. PERFORMANCE SPECIFICATIONS CONTINUED ...............................................1-4

TABLE 1-1. PERFORMANCE SPECIFICATIONS CONTINUED ...............................................1-5

TABLE 2-1 INITIAL CONDITIONS.............................................................................................. 2-2

TABLE 3-1. CONTROLS, INDICATORS AND CONNECTORS...................................................3-3

TABLE 3-2. FUNCTION DISPLAY AND DATA ENTRY UNITS...................................................3-7

TABLE 3-3. VALID FUNCTION ARGUMENT RANGE.................................................................3-8

TABLE 3-4. INPUT LEVEL RANGES .........................................................................................3-10

TABLE 3-5. DISTORTION AND SINAD RANGES .....................................................................3-11

TABLE 3-6. OUTPUT LEVEL RANGES .....................................................................................3-14

TABLE 3-7. SPECIAL FUNCTIONS...........................................................................................3-15

TABLE 3-8. OPTION SWITCH A4S1..........................................................................................3-16

TABLE 3-9. ERROR CODES......................................................................................................3-17

TABLE 3-10. IEEE-488 BUS MNEMONICS ..............................................................................3-19

TABLE 3-11. TALK FUNCTION (TF) DECODING ....................................................................3-20

TABLE 3-12. BUS COMMAND RESPONSES............................................................................3-22

TABLE 5-1. RECOMMENDED TEST EQUIPMENT ...................................................................5-2

TABLE 5-2. OPTIONAL FILTERS ................................................................................................5-3

TABLE 5-3. ANALYZER DC LEVELACCURACYTEST RECORD...............................................5-9

TABLE 5-4. ANALYZER AC LEVEL ACCURACY TEST RECORD .........................................5-11

TABLE 5-5. ANALYZER AC LEVEL FLATNESS TEST RECORD ............................................5-12

TABLE 5-6. SOURCE IMPEDANCE ACCURACY TEST RECORD .........................................5-13

TABLE 5-7. SOURCE LEVEL ACCURACY TEST RECORD.....................................................5-13

TABLE 5-8. SOURCE LEVEL FLATNESS TEST RECORD .....................................................5-13

TABLE 5-9. ANALYZER LOW LEVEL AC ACCURACY TEST RECORD ................................5-14

TABLE 5-10. SOURCE FREQUENCY ACCURACY TEST RECORD .....................................5-14

TABLE 5-11. ANALYZER FREQUENCY ACCURACY TEST RECORD ...................................5-14

TABLE 5-12. FILTER ACCURACY TEST RECORD..................................................................5-15

TABLE 5-13. RESIDUAL DISTORTION TEST RECORD ..........................................................5-15

TABLE 5-14. RESIDUAL SIGNAL-TO-NOISE TEST RECORD ...............................................5-16

TABLE 5-15. COMMON MODE REJECTION RATIO TEST RECORD .................................. 5-16

TABLE 5-16. CCITT FILTER ACCURACY TEST RECORD ................................................... 5-17

TABLE 5-17. CCIR FILTER ACCURACY TEST RECORD ......................................................5-18

TABLE 5-18. A WEIGHTING FILTER ACCURACY TEST RECORD ........................................5-19

TABLE 5-19. B WEIGHTING FILTER ACCURACY TEST RECORD ........................................5-20

TABLE 5-20. C WEIGHTING FILTER ACCURACY TEST RECORD .......................................5-21

TABLE 5-21. C-MESSAGE FILTER ACCURACY TEST RECORD ..........................................5-22

TABLE 5-22. LIST OF ADJUSTMENTS.....................................................................................5-23

TABLE 5-23. DIAGNOSTIC ERROR CODE DESCRIPTION ...................................................5-27

TABLE 6-1. MANUFACTURER’S FEDERAL SUPPLY CODE NUMBERS .................................6-1

TABLE 6-2. REPLACEABLE PARTS LIST .................................................................................6-2

TABLE 7-1. LIST OF SCHEMATICS ............................................................................................7-1

List of Figures

Figure Page

Figure 1-1. Outline Dimensions ...................................................................................................1-5

Figure 2-1. Packing and Unpacking Diagram .............................................................................2-3

Figure 3-1. Model 1121A, Front View...........................................................................................3-2

Figure 3-2. Model 1121A, Rear View............................................................................................3-2

Figure 4-1. Functional Block Diagram...........................................................................................4-1

Figure 4-2. Power Supply Circuits Block Diagram...................................................................... 4-3

Figure 4-3. CPU Circuits Block Diagram.......................................................................................4-4

Figure 4-4. Frequency Counter Circuits Block Diagram ..............................................................4-6

Figure 4-5. Input Circuits Block Diagram .....................................................................................4-8

Figure 4-6. Filter Circuits Block Diagram .....................................................................................4-9

Figure 4-7. Notch Filter Circuits Block Diagram..........................................................................4-11

Figure 4-8. Detector Circuits Block Diagram...............................................................................4-12

Figure 4-9. Source Circuits Block Diagram.................................................................................4-13

Figure 4-10. Output Circuits Block Diagram ..............................................................................4-15

Figure 5-1. Removing Covers ................................................................................................... 5-1

Figure 5-2. Removing Top and Bottom Trim Extrusions .............................................................5-3

Figure 5-3. Removing Circuit Boards............................................................................................5-3

Figure 6-1. Model 1121A Programmable Audio Analyzer ............................................................6-2

Figure 6-2. ‘1121A’ Frame Assy (A22)..........................................................................................6-4

Figure 6-3. PWA ‘1121A’ Input (A0)..............................................................................................6-7

Figure 6-4. PWA ‘1121A’ Main Filter (A1)...................................................................................6-10

Figure 6-5. PWA ‘1121A’ Notch (A2) .........................................................................................6-12

Figure 6-6. PWA ‘1121A’ Detector (A3) ....................................................................................6-15

Figure 6-7. PWA ‘1121A’ Freq Counter (A4) ............................................................................ 6-18

Figure 6-8. PWA ‘1121A’ CPU (A5) ..........................................................................................6-21

Figure 6-9. PWA ‘1121A’ Source (A6) .......................................................................................6-23

Figure 6-10. PWA ‘1121A’ Output (A7)..................................................................................... 6-26

Figure 6-11. Front Panel Assy (A17) ........................................................................................ 6-29

Figure 6-12. PWA ‘1121A’ Keyboard (A13) ...............................................................................6-30

Figure 6-13. Sub Panel Assy (A23) .......................................................................................... 6-32

Figure 6-14. PWA ‘1121A’ Display (A12).................................................................................. 6-33

Figure 6-15. Power Switch (A14), BRKT Conn Assy Input (A15) and Output (A16)................ 6-35

Figure 6-16. Rear Panel Assy (A21) .........................................................................................6-37

Figure 6-17. Heat Sink Assy (A20) .............................................................................................6-39

Figure 6-18. Power Amplifier (A24).............................................................................................6-41

Figure 6-19. Transformer Assy (T1)........................................................................................... 6-42

Figure 6-20. ‘1121A’ Card Cage Detail.......................................................................................6-46

Figure 6-21. PWA ‘1121A’ Mother (A10) ....................................................................................6-47

Figure 6-22. PWA 400 Hz High Pass Filter.................................................................................6-50

Figure 7-1. Main Frame Schematic...............................................................................................7-3

Figure 7-2. Input Board A0 Parts Location Diagram ...................................................................7-4

Figure 7-3. Input Board A0 Schematic..........................................................................................7-5

Figure 7-4. Filter board A1 Parts Location Diagram .....................................................................7-6

Figure 7-5. Filter Board A1 Schematic..........................................................................................7-7

Figure 7-6. Notch Board A2 Parts Location Diagram ...................................................................7-8

Figure 7-7. Notch Board A2.1 Schematic .....................................................................................7-9

Figure 7-8. Notch Board A2.2 Schematic ...................................................................................7-11

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