Tektronix THS710A Manual do Utilizador Página 20
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Specifications
THS710A, THS720A, THS730A & THS720P Service Manual
1–5
Table 1–1: Oscilloscope specifications (Cont.)
Measurements
Cursors Voltage difference between cursors (DV)
Time difference between cursors (DT)
Reciprocal of DT in Hertz (1/DT)
Phase difference between cursors (DDegrees)
Automated
Measurements
Amplitude, Burst Width, Cycle Mean, Cycle RMS, Fall Time,
Frequency, High, Low, Max, Mean, Min, Negative Duty Cycle, Negative
Overshoot, Negative Width, Pk – Pk, Period, Positive Duty Cycle,
Positive Overshoot, Positive Width, Rise Time, and RMS
Voltage and Current Harmonics (THS720P)
Number of Harmonics First 31 harmonics of signal with fundamental frequency between
30 Hz and 450 Hz
Ha
rm
onic
s
Amp
litu
de
Accuracy
Accuracies below are stated as a percent of the fundamental amplitude
and are valid only if peak-to-peak amplitude is ≥4 divisions and number
of averages ≥16
Fundamental 2 – 11 12 – 21 22 – 31
±2.5% ±2.5% ±4% ±4%
Ha
rm
onic
s
Pha
se
Ary
Fundamental 2 – 11 12 – 21 22 – 31
A
ccu
r
ac
y
— ±4 ° ±8 ° ±8 °
THD-F Measurement Total harmonic distortion relative to the fundamental amplitude
THD-F
V
2
RMS
V
2
f
V
f
or
A
2
RMS
A
2
f
A
f
THD-F Accuracy ±4%
THD-R Measurement Total harmonic distortion relative to the RMS amplitude
THD-R
V
2
RMS
V
2
f
V
RMS
or
A
2
RMS
A
2
f
A
RMS
THD-R Accuracy ±4%
Frequency Accuracy ±0.2% of reading
Power Measurements (THS720P)
True Power
Measurement
W
1
n
n
V
n
A
n
measured over an integral number of cycles that
contain n sample points
Apparent Power
Measurement
VA V
RMS
A
RMS
Reactive Power
Measurement
VAR (VA)
2
W
2
Power Measurements
Accuracy
±4% at the BNCs (not including probe uncertainty)
- Service Manual 1
- THS710A, THS720A 1
- THS730A & THS720P 1
- TekScope 1
- 070-9752-01 1
- WARRANTY 3
- Service Assurance 4
- Table of Contents 5
- List of Figures 7
- List of Tables 8
- General Safety Summary 9
- Symbols and Terms 10
- Battery Recycling 10
- Service Safety Summary 11
- Related Manuals 13
- Conventions 14
- Specifications 16
- Operating Information 31
- Using External Power 32
- Understanding the Front Panel 33
- Using Meter Mode 34
- Using the Menu System 35
- Using the Dedicated 37
- Top panel 38
- Side panel 38
- Compensating the 39
- Oscilloscope Probes 39
- Attaching the Reference 40
- Leads Correctly 40
- Beware of High Voltages 40
- Theory of Operation 42
- Display Module 43
- Switch Assembly 43
- Performance Verification 45
- Test Record 46
- Signal Path Compensation 48
- Execute Self Test 49
- Check Oscilloscope DC 50
- Measurement Accuracy 50
- Check Oscilloscope 52
- Channel 1 Bandwidth 52
- Channel 2 Bandwidth 54
- Sample Rate and Delay 56
- Time Accuracy 56
- Channel 1 Edge Trigger 58
- Sensitivity 58
- Channel 2 Edge Trigger 60
- Check Meter DC Voltage 62
- Accuracy 62
- Check Meter AC Voltage 64
- Check Meter Resistance 66
- Adjustment Procedures 70
- Adjustment-lockout 73
- Oscilloscope Adjustment 74
- Procedure 76
- Completing the 76
- Adjustment Process 76
- Meter Adjustment 77
- Inspection and Cleaning 84
- Preparation 87
- List of Modules 87
- Summary of Procedures 88
- Tools Required 89
- Tilt Stand 90
- Front-Panel Label 92
- Front Cover 93
- Display shield 95
- Front cover 95
- Foam pad 95
- Gasket material 96
- Trim tails to 96
- Overlap gasket material 96
- Inverter board 99
- Display cable connector 99
- Switch flex-circuit board 99
- Display module 99
- Contact side of cable 100
- Back Cover 101
- Maintenance 104
- Complete Disassembly 105
- Typical locating marks 107
- Align this foam pad with 107
- Insert circuit board tabs 109
- Route battery cable into 109
- Troubleshooting 110
- Test here 111
- Backlight 114
- Executing Diagnostics 117
- Input Connections 118
- Other Troubleshooting 119
- Unpacking 122
- Repacking 122
- Electrical Parts List 127
- Diagrams 130
- Mechanical Parts List 133
- Module Servicing 134
- Abbreviations 134
- Mfr. Code to Manufacturer 134
- Cross Index 134
- Manufacturers Cross Index 135
- Replaceable Parts List 136
- Figure 10–1: Exploded diagram 137
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