Fluke PM-3370B Instrukcja Użytkownika Strona 71
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3 - 52 USING THE COMBISCOPE INSTRUMENTS
dBm - 50Ω offset calculation:
From the Vrms offset value the dBm-50Ω offset value is calculated as follows:
Example for attenuator setting 0.5 V/div.:
dBm - 600Ω offset calculation:
From the Vrms offset value the dBm-600Ω offset value is calculated as follows:
Example for attenuator setting 0.5 V/div.:
dBµV offset calculation:
From the Vrms offset value the dBµV offset value is calculated as follows:
Example for attenuator setting 0.5 V/div.:
dBm 50Ω offset– 20 * Vrms offset 0,2236068⁄()log
10
=
P *R() 1E-3 *50()0,2236068==
Note:
dBm 50Ω offset– 20 * 1,118034 0,2236068⁄()log
10
13,9794==
dBm 600Ω offset– 20 * Vrms offset 0,7745967⁄()log
10
=
P *R() 1E-3 *600()0,7745967==
Note:
dBm 600Ω offset– 20 * 1,118034 0,7745967⁄()log
10
3,1875874==
dBµV offset 20 * Vrms offset 1.0E-6⁄()log
10
=
Note: 0 dBµV = 1 µV (1.0E-6 V) at 50Ω impedance.
dBµV offset 20 * 1,118034 1E-6⁄()log
10
120,9691==
- $XWRUDQJLQJ 1
- &RPEL6FRSH 1
- ,QVWUXPHQW 1
- Printed in the Netherlands 2
- 1 ABOUT THIS MANUAL 3
- B CROSS REFERENCES 7
- C MANUAL CONVENTIONS 7
- D STANDARDS INFORMATION 7
- E SUMMARY OF SYSTEM SETTINGS 7
- 2 GETTING STARTED WITH SCPI 10
- PROGRAMMING 10
- 2.3 Error Reporting 14
- 2.4 Acquiring Traces 15
- 3 USING THE COMBISCOPE 20
- INSTRUMENTS 20
- INPut SENSe 24
- TRACe CALCulate 24
- 3.4 Acquisition 37
- 3.4.1.1 Triggering 39
- Figure 3.4 DC Coupling 41
- Figure 3.5 AC Coupling 41
- 3.4.1.2 Video triggering 42
- Figure 3.6 LF Reject 42
- Figure 3.7 HF Reject 42
- 3.4.1.3 The trigger modes 44
- Figure 3.8 Pre-triggering 46
- 3.4.1.5 External triggering 47
- • Peak detection is off 47
- PRINT sample(i); 54
- SENSe:AVERage:COUNt 56
- 3.6 Channel Selection 57
- 3.7 Signal Conditioning 58
- , i.e., 1 division 60
- 3.8 Time Base Control 61
- 3.9 Post Processing 64
- CALCulate block, but not 66
- 0,5 *2,236068 1,118034== 70
- 3.10 Trace Memory 75
- 3.11 Screen/Display Functions 80
- PROGRAM EXAMPLE: 83
- MEAS selections 83
- 3.12 Print/Plot Functions 85
- 3.13 Real-Time Clock 87
- 3.14 Auto Calibration 87
- 3.15 Status Reporting 89
- 3.17 Front Panel Simulation 98
- 4 COMMAND REFERENCE 101
- 4.2 Command Summary 105
- 4.3 Command Descriptions 113
- CAL? CALibration 115
- CLS Clear Status 116
- ESE Event Status Enable 117
- ESR? Event Status Register 118
- IDN? Identification 119
- OPC Operation Complete 120
- OPT? Option identification 121
- RCL Recall instrument setup 122
- RST Reset 123
- SAV Save instrument setup 125
- SRE Service Request Enable 126
- STB? Status Byte 127
- TRG Trigger 128
- TST? Self-test 129
- WAI Wait-to-continue 130
- CALCulate<n>:FEED 133
- CALCulate<n>:MATH:STATe 137
- CALibration[:ALL] 141
- CONFigure 143
- DISPlay:BRIGhtness 145
- DISPlay:MENU[:NAME] 146
- DISPlay:MENU:STATe 147
- DISPlay:WINDow2:TEXT[1]:CLEar 150
- DISPlay:WINDow2:TEXT[1]:DATA 151
- DISPlay:WINDow2:TEXT[1]:STATe 153
- FORMat[:DATA] 157
- HCOPy:DATA? 158
- HCOPy:DEVice 159
- INITiate:CONTinuous 160
- INITiate[:IMMediate] 161
- INPut<n>:COUPling 162
- INPut<n>:IMPedance 164
- INPut<n>:POLarity 165
- INSTrument:NSELect 166
- INSTrument[:SELect] 166
- MEASure? 167
- SENSe:AVERage[:STATe] 176
- SENSe:FUNCtion:OFF 178
- SENSe:FUNCtion[:ON] 178
- SENSe:FUNCtion:STATe? 178
- → *RST Switches channel 1 on 179
- SENSe:SWEep:OFFSet:TIME 180
- SENSe:SWEep:REALtime[:STATe] 182
- SENSe:SWEep:TIME 183
- SENSe:SWEep:TIME:AUTO 185
- → *RST Switches CH1 on 186
- → *RST Resets the instrument 189
- STATus:OPERation:CONDition? 190
- STATus:OPERation:ENABle 190
- STATus:OPERation[:EVENt]? 190
- STATus:OPERation:NTRansition 190
- STATus:OPERation:PTRansition 190
- STATus:PRESet 192
- STATus:QUEStionable:ENABle 193
- STATus:QUEStionable[:EVENt]? 193
- STATus:QUEue[:NEXT]? 195
- SYSTem:BEEPer 196
- SYSTem:BEEPer:STATe 196
- SYSTem:DATE 200
- SYSTem:ERRor? 201
- SYSTem:KEY 202
- COMMAND REFERENCE 4 - 103 203
- SYSTem:SET 205
- SYSTem:TIME 207
- SYSTem:VERSion? 208
- TRACe:COPY 209
- TRACe[:DATA] 210
- Reads offset 212
- TRACe:POINts 213
- TRIGger[:SEQuence[1]]:HOLDoff 219
- TRIGger[:STARt]:HOLDoff 219
- TRIGger[:SEQuence[1]]:LEVel 220
- TRIGger[:STARt]:LEVel 220
- TRIGger[:STARt]:LEVel:AUTO 220
- TRIGger[:SEQuence[1]]:SLOPe 222
- TRIGger[:STARt]:SLOPe 222
- TRIGger[:SEQuence[1]]:SOURce 224
- TRIGger[:STARt]:SOURce 224
- TRIGger[:SEQuence[1]]:TYPE 226
- TRIGger[:STARt]:TYPE 226
- → 525 → NTSC 230
- → 1050 → HDTV 230
- → 1125 → HDTV 230
- → 1250 → HDTV 230
- TRIGger[:STARt]:VIDeo:LINE 232
- APPLICATION PROGRAM EXAMPLES 234
- APPENDIX A 234
- A.2 Acquiring Waveform Traces 238
- A.5 Pass/Fail Testing 243
- APPENDIX B CROSS REFERENCES 246
- B - 2 CROSS REFERENCES 247
- CROSS REFERENCES B - 3 248
- B.2.1 ACQUIRE menu 248
- B - 4 CROSS REFERENCES 249
- B.2.2 CURSORS menu 249
- Programmable with the 249
- RCL and SYST:SET commands 249
- CROSS REFERENCES B - 5 250
- B.2.3 DISPLAY menu 250
- B - 6 CROSS REFERENCES 251
- B.2.4 MATHPLUS MATH menu 251
- CROSS REFERENCES B - 7 252
- B - 8 CROSS REFERENCES 253
- TRAC:COPY 255
- TRAC[:DATA]? 255
- TRAC[:DATA] 255
- CROSS REFERENCES B - 11 256
- B.2.9 TB MODE menu 256
- B - 12 CROSS REFERENCES 257
- B.2.10 TRIGGER menu 257
- CROSS REFERENCES B - 13 258
- B - 14 CROSS REFERENCES 259
- B.2.11 UTILITY menu 259
- CROSS REFERENCES B - 15 260
- Note: - 50 261
- only applicable for PM3394B 261
- APPENDIX C MANUAL CONVENTIONS 274
- C.2 Glossary of Symbols Used 277
- C.3 List of Tables 277
- C.4 List of Figures 278
- C.5 Documents Referenced 279
- APPENDIX D 280
- STANDARDS INFORMATION 280
- Elements 281
- APPENDIX E 283
- SUMMARY OF SYSTEM SETTINGS 283
- Numerics 286
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