Pendulum CNT-90 Series User Manual

Pendulum CNT-90 Series

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Timer/Counter/Analyzer

CNT-90, CNT-91

Frequency Calibrator/Analyzer

CNT-91R

Microwave Counter/Analyzer

CNT-90XL

User's Manual

Table of Contents

Default Chapter3
- Table of Contents3
- General Information8
1 Preparation for Use9
Preface10
- Introduction10
  - Powerful and Versatile Functions10
  - No Mistakes11
- Design Innovations11
  - State of the Art Technology Gives Durable Use11
  - High Resolution11
- Remote Control12
  - Fast GPIB Bus12
Safety13
- Introduction13
- Safety Precautions13
Unpacking16
- Check List16
- Identification16
- Installation17
2 Using the Controls20
- Basic Controls21
- Secondary Controls23
- Description of Keys26
- Default Settings39
3 Input Signal Conditioning41
- Input Amplifier42
- How to Reduce or Ignore Noise and Interference46
  - Trigger Hysteresis46
  - How to Use Trigger Level Setting47
4 Measuring Functions49
Introduction to this Chapter50
- Selecting Function50
Frequency Measurements51
- Freq A, B51
- Freq C52
  - Cnt-90/91(R)52
  - Cnt-90Xl52
- Ratioa/B, B/A, C/A, C/B52
- Burst A, B, C52
- Triggering52
  - Burst Measurements Using Manual Presetting53
- Frequency Modulated Signals54
- AM Signals56
  - Carrier Wave Frequency56
  - Modulating Frequency57
- Theory of Measurement57
- Period61
Time Measurements63
- Introduction63
  - Triggering63
- Time Interval64
- R): Time Interval Error (TIE)64
- Rise/Fall Time A/B64
- Pulse Width A/B65
- Duty Factor A/B65
- Measurement Errors66
Phase68
- What Is Phase68
- Resolution68
- Possible Errors68
  - Inaccuracies69
Totalize [CNT-91(R) Only]72
- Totalize in General72
- Tot a man72
- Tot B man72
- Tot A+B man72
  - Applications73
- Tot A/B man73
- Totalize & Arming73
  - Examples73
Voltage75
- Pulsed Signals [CNT-90XL Option 28 Only]77
- About this Chapter82
Controlling Measurement Timing84
- The Measurement Process84
- Arming Setup Time89
- Arming Examples89
6 Process95
- Introduction96
  - Averaging96
- Mathematics96
  - Example96
- Statistics97
- Limits100
  - Limit Behavior100
  - Limit Mode100
- Limits and Graphics101
7 Performance Check103
- General Information104
- Preparations104
- Test Equipment104
- Front Panel Controls105
  - Internal Self-Tests105
  - Keyboard Test105
- Short Form Specification Test107
- Rear Inputs/Outputs111
  - Mhz out111
  - Ext Arm Input112
- Measuring Functions113
- Check of HOLD off Function113
- RF Inputs113
  - (CNT-90XL Only)115
- Battery Supply116
  - Option 23/90 for CNT-90 & CNT-90XL Only116
8 Specifications117
- Introduction119
- Measurement Functions119
- Input and Output Specifications122
- Auxiliary Functions124
- Battery Unit126
  - Option 23/90126
- Measurement Uncertainties127
- Calibration129
  - Definition of Terms129
- General Specifications129
- Ordering Information130
- Timebase Options131
  - Explanations131
Cnt-90Xl132
- Introduction133
- Measurement Functions133
Cnt-91(R)142
- Period A, B Back-To-Back144
- Ratio A/B, B/A, C/A, C/B144
- Time Interval a to B, B to A, a to A,B to B144
- Pulse Width A, B144
- Rise and Fall Time A, B144
- Time Interval Error (TIE) A, B145
- Phase a Rel. B, B Rel. a145
- Duty Factor A, B145
- Timestamping A, B146
- Auto Set / Manual Set146
- Max146
- Totalize A, B, A+B, A-B, A/B146
- Min146
- Input and Output Specifications147
  - Inputs a and B147
  - Input C (Option 10)147
    - Input C148
  - Rear Panel Inputs & Outputs148
  - Input C (Option 13)148
  - Input C (Options 14 & 14B)148
- Auxiliary Functions149
  - Trigger Hold-Off149
  - External Start/Stop Arming149
    - Statistics149
  - Mathematics150
  - Other Functions150
    - Display150
    - GPIB Interface150
  - USB Interface151
    - Timeview151
- Measurement Uncertainties152
  - Random Uncertainties (1Σ)152
  - Systematic Uncertainties152
  - Total Uncertainty (2Σ)152
    - Time Interval, Pulse Width, Rise/Fall Time152
  - Random Uncertainties (1)152
  - Total Uncertainty (2)152
  - Frequency & Period A, B153
  - Frequency & Period C153
  - Frequency Ratio F or F153
  - Frequency Ratio F 1 2153
  - Phase153
  - Duty Factor153
  - Frequency & Period153
- Calibration154
  - Definition of Terms154
- General Specifications154
  - Environmental Data154
  - Power Requirements155
  - Dimensions & Weight155
- Ordering Information155
- Timebase Options156
- Timebase Options CNT-91156
  - Explanations156
- Timebase Specifications CNT-91R157
Cnt-91R/71B158
- Introduction159
- Measurement Functions159
- Input and Output Specifications163
- Auxiliary Functions164
- Measurement Uncertainties167
- Calibration169
  - Definition of Terms169
- General Specifications169
- Timebase Specifications CNT-91R/71B171
9 Index173

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Pendulum CNT-90 Series Specifications

General

Resolution	1 mHz (0.001 Hz)
Input Channels	2
Frequency Range	0.001 Hz to 2.4 GHz
Interfaces	USB
Functions	Frequency, Period, Time Interval, Totalize, Ratio, Phase, Duty Cycle
Measurement Range	0.001 Hz to 2.4 GHz
Accuracy	±1 ppm
Operating Temperature Range	0°C to 50°C
Power Supply	100-240 VAC, 50-60 Hz
Interface	USB

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