AMERITEC AM-48 User manual

Models AM-48 and AM-48E
Personal Transmission
Test Set
INSTRUCTION MANUAL

Models AM-48 and AM-48E
Personal Transmission
Test Set
Instruction Manual
February 4, 2000
Technical Data Subject to
Change without Notice
760 Arrow Grand Circle
Covina, CA 91722 USA
TEL [phone]
FAX [phone]
www.ameritec.com
For extra copies of
this manual, order
Part No. 18-0015 © 2000 Ameritec Corporation

0015-TPG
ii
Record of Revisions
ASeptember 1992 Initial Release.
BJanuary 28, 1998 Minor Update Changes.
COctober 2, 1998 Changed Generator
Accuracy Specs.
C1 October 9, 1999 Changed Distortion
specification on 1-6.
DFebruary 4, 2000 Reformatted Manual to
provide new soft copy.
EJanuary 19, 2004 Made a Better PDF
FApril 19, 2004 Option

AM-48 Test Set (18-0015) Table of Contents
0015-TOC iii
Table of Contents
1. INTRODUCTION ...................................................................................... 1-1
1.1 Manual Overview...............................................................................1-1
1.2 General Description...........................................................................1-2
1.3 AM-48 Technical Specifications........................................................1-4
1.4 AM-48E Technical Specifications....................................................1-11
2. RECEIVING AND UNPACKING..............................................................2-1
2.1 Introduction ........................................................................................ 2-1
2.2 Inspection when Received ................................................................2-1
2.3 Verification of Contents .....................................................................2-1
3. PHYSICAL & FUNCTIONAL DESCRIPTION.........................................3-1
3.1 Introduction ........................................................................................ 3-1
3.2 General ..............................................................................................3-1
3.3 Component Location..........................................................................3-2
3.4 Connectors and Cables.....................................................................3-3
3.5 Switches............................................................................................. 3-5
3.6 Keyboard.......................................................................................... 3-14
3.7 Display .............................................................................................3-17
3.8 Microphone/Speaker........................................................................3-19
3.9 Hand-Held Printer............................................................................3-20
3.10 Impedance Adapter .......................................................................3-24
4. POWER CONSIDERATIONS..................................................................4-1
4.1 General ..............................................................................................4-1
4.2 Battery Compartment ........................................................................4-1
4.3 Battery-Selector Switch.....................................................................4-1
4.4 Battery Installation.............................................................................4-3
4.5 Battery Information ............................................................................4-3
4.6 AC Power...........................................................................................4-4
4.7 Power On/Off Switch ......................................................................... 4-4

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5. SELF-TEST INSTRUCTIONS.................................................................. 5-1
5.1 General ..............................................................................................5-1
5.2 Self-Test Setup.................................................................................. 5-1
5.3 Quiet Send Mode............................................................................... 5-4
5.4 Send 1004 Hz.................................................................................... 5-5
5.5 Send PAR (Peak-to-Average Ratio).................................................. 5-7
5.6 Dialing ................................................................................................ 5-8
5.7 Parameter Values for Send Sweep.................................................5-10
6. CONNECTION AND CONFIGURATION.................................................6-1
6.1 Introduction ........................................................................................ 6-1
6.2 General ..............................................................................................6-1
6.3 Connectors and Cables.....................................................................6-2
6.4 600Ω/900ΩLine Termination Impedances......................................6-7
6.5 Impedance Adapter ...........................................................................6-9
6.6 Configurations.................................................................................. 6-10
7. OPERATING INSTRUCTIONS................................................................7-1
7.1 Introduction ........................................................................................ 7-1
7.2 General Instructions and Notes.........................................................7-3
7.3 General Operating Notes................................................................... 7-3
7.4 Figure Format ....................................................................................7-4
7.5 General Switch Setup........................................................................7-6
7.6 Multiple Use of Keys.......................................................................... 7-8
7.7 Memory..............................................................................................7-9
7.8 General Procedure to Set New Parameter Values.........................7-12
7.9 Send (Generator) Modes and Parameter Settings......................... 7-13
7.10 Types of Send Signals................................................................... 7-13
7.11 Send Quiet....................................................................................7-14
7.12 Set Parameters from Quiet Display .............................................7-15
7.13 Send Momentary Variable Tones................................................. 7-17
7.14 Send 1004 Hz............................................................................... 7-18
7.15 Send Continuous Variable Tone.................................................. 7-19

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7.16 Send Set of Slope Tones .............................................................7-19
7.17 Send Variable Sweep...................................................................7-20
7.18 Send PAR Waveform ...................................................................7-22
7.19 Send Momentary 2713 Hz Tone.................................................. 7-22
7.20 General Instructions and Notes for MEASURE Modes...............7-22
7.21 Accuracy of Measurements.......................................................... 7-22
7.22 Absolute and Relative Measurements......................................... 7-23
7.23 Special Measurement Requirements........................................... 7-24
7.24 Timed Tests..................................................................................7-26
7.25 MEASURE Modes........................................................................ 7-27
7.26 Measure Level and Frequency.....................................................7-27
7.27 Measure Noise..............................................................................7-28
7.28 Measure PAR................................................................................ 7-29
7.29 Measure Impulse Noise................................................................7-29
7.30 Measure Notched Noise...............................................................7-32
7.31 Measure S/N Ratio ....................................................................... 7-34
7.32 Measure Phase Jitter....................................................................7-34
7.33 Measure Amplitude Jitter..............................................................7-35
7.34 Measure Transients......................................................................7-36
7.35 Miscellaneous Operations............................................................7-40
7.36 Store and Recall...........................................................................7-40
7.37 Dialing...........................................................................................7-43
7.38 Talking........................................................................................... 7-45
7.39 Printing.......................................................................................... 7-45
7.40 Auto Study Result Save................................................................7-56
7.41 Impedance Adapter Measurement Corrections........................... 7-56
7.42 Auto Calibrate............................................................................... 7-59
8. EXPLANATION AND APPLICATION OF MEASUREMENTS............... 8-1
8.1 Introduction ........................................................................................ 8-1
8.2 Units of Measurement .......................................................................8-1
8.3 Level (Loss or Gain) and Frequency.................................................8-4
8.4 Idle Channel Noise ............................................................................8-4

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8.5 Notched Noise (Noise with Tone) .....................................................8-4
8.6 Signal-to-Noise (S/N) Ratio...............................................................8-5
8.7 P/AR Measurements.......................................................................... 8-6
8.8 Gain Slope .........................................................................................8-8
8.9 Idle Channel Impulse Noise ..............................................................8-9
8.10 Phase Jitter....................................................................................8-11
8.11 Amplitude Jitter..............................................................................8-11
8.12 Notched Impulse Noise .................................................................8-12
8.13 Phase Hits......................................................................................8-12
8.14 Gain Hits ........................................................................................8-12
8.15 Dropouts......................................................................................... 8-12
9. CIRCUIT DIAGRAMS............................................................................... 9-1
9.1 Introduction ........................................................................................ 9-1
9.2 AM-48 Simplified Block Diagram.......................................................9-1
9.3 Impedance Adapter Schematic......................................................... 9-3
10. WARRANTY, SERVICE, AND CALIBRATION .................................. 10-1
10.1 Warranty......................................................................................... 10-1
10.2 Service Policy ................................................................................10-1
10.3 Calibration Policy...........................................................................10-1
10.4 Return of Unit.................................................................................10-2
11. GLOSSARY...........................................................................................11-1

AM-48 Test Set (18-0015) Table of Contents
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List of Figures
Figure 3-1. AM-48 Location of Components................................................ 3-3
Figure 3-2. AM-48 Connectors.....................................................................3-4
Figure 3-3. Standard AM-48 Cables ............................................................3-4
Figure 3-4. Optional AM-48 Cables..............................................................3-5
Figure 3-5. AM-48 Switch Identification Numbers ....................................... 3-6
Figure 3-6. AM-48 Keyboard Identification Numbers ................................3-15
Figure 3-7. AM-48 Liquid Crystal Display ..................................................3-18
Figure 3-8. Hand-Held Printer, External View............................................3-22
Figure 3-9. Hand-Held Printer, Internal View............................................. 3-23
Figure 3-10. Impedance Adapter................................................................ 3-24
Figure 4-1. Battery Installation and Selector Switch.................................... 4-2
Figure 5-1. AM-48 Setup for Self-Test (Looped Back)................................ 5-2
Figure 5-2. General Switch Setup for Self Test...........................................5-3
Figure 5-3. Quiet Send Mode Self Test........................................................ 5-4
Figure 5-4. Send 1004 Hz Self Test, Switch Settings.................................. 5-6
Figure 5-5. Send 1004 Hz Self Test, Displays.............................................5-7
Figure 5-6. Send PAR (Peak-to-Average Ratio).......................................... 5-8
Figure 5-7. Dialing....................................................................................... 5-10
Figure 5-8. Default Parameter Settings for SWEEP Send Mode.............. 5-14
Figure 6-1. 2-Wire AM-48 Line Connections................................................ 6-3
Figure 6-2. 4-Wire AM-48 Line Connections................................................ 6-4
Figure 6-3. AM-47 Hand-Held Printer Connection with AC Power..............6-5
Figure 6-4. 4-Wire End-to-End Testing...................................................... 6-11
Figure 6-5. 4-Wire Testing with Responder...............................................6-13
Figure 6-6. 2-Wire Network Testing with Responders............................... 6-14
Figure 7-1. Parameter Settings from QUIET SEND Display..................... 7-15
Figure 7-2. Parameter Settings from 1004 Hz and VAR Tone Displays ...7-18

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Figure 7-3. Parameter Settings from 3-TONE Slope and
PAR SEND Displays......................................................... 7-20
Figure 7-4. Parameter Settings from SWEEP SEND Display................... 7-21
Figure 7-5. L/F, NOISE, and PAR MEASURE Displays............................7-28
Figure 7-6. IMPLS MEASURE Displays..................................................... 7-32
Figure 7-7. Notched NOISE and S/N Ratio MEASURE Displays ............. 7-33
Figure 7-8. Phase JTR and Amplitude JTR MEASURE Displays............. 7-35
Figure 7-9. TRANS MEASURE Displays..........................................7-39, 7-40
Figure 7-10. Recall and Store Operations .................................................7-42
Figure 7-11. SEND Printouts...................................................................... 7-52
Figure 7-12. MEASURE Printouts, Absolute Measure Mode....................7-54
Figure 7-13. MEASURE Printouts, Relative Measure Mode.....................7-55
Figure 7-14. Impedance Adapter Correction Value Memory Aid...............7-58
Figure 7-15. AM-48 Auto Calibrate Prompts..............................................7-60
Figure 8-1. Level and Noise Units of Measurement....................................8-2
Figure 8-2. Impulse Noise Thresholds and Blanking Intervals.................. 8-10
Figure 9-1. Simplified Block Diagram of the AM-48.....................................9-2
Figure 9-2. Schematic Diagram of the Impedance Adapter........................ 9-4

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List of Tables
Table 1-1. AM-48 General Technical Specifications ...................................1-5
Table 1-2. AM-48 Generator (Send) Technical Specifications.................... 1-6
Table 1-3. AM-48 Receiver (Measure) Technical Specifications................ 1-8
Table 1-4. AM-48 Power/Physical Technical Specifications ..................... 1-11
Table 2-1. AM-48 Standard Equipment.......................................................2-2
Table 2-2. AM-48 Optional Equipment ........................................................2-2
Table 3-1. Front Panel/Switches Color Coding............................................3-2
Table 3-2. AM-48 SEND, MEASURE, and FILTER Menus....................... 3-19
Table 3-3. AM-47 Hand-Held Printer Technical Specifications.................3-21
Table 7-1. Setup Requirements for Different Keyboard Applications .........7-8
Table 7-2. Steps for Up and Down Arrow Keys...........................................7-9
Table 7-3. User-Programmable Parameter Values Stored in Memory..... 7-11
Table 7-4. Acceptable Holding Tone Ranges............................................ 7-25
Table 7-5. Special Measurement Requirements........................................7-26
Table 7-6. Setup Requirements for Dialing................................................7-44
Table 7-7. MF and DTMF Tone Pairs.........................................................7-44
Table 7-8. Impedance Adapter Correction Values..................................... 7-57
Table 8-1. P/AR Requirements of Telephone Lines....................................8-6