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RIGOL
© 2007 RIGOL Technologies, Inc.
User’s Guide for DM3000 Series
2-17
3. dB Measurement
The dB function applies to AC voltage and DC voltage measurements only.
Each dB measurement is different between the input signal and a stored relative
value, with both values converted to dBm.
Press Æ dB, enter the menu shown below:
Figure 2- 16
Table 2- 13 dB Measurement Function Menu Function Description
Function
Menu
Description
Default Use the default value.
Save all changes, back to a higher level menu.
dB =10xLog
10
[ (Reading
2
/ R
REF
) / 0.001W ] – (dB setting value)
R
REF
expressed measuring the resistance value in the actual electric circuit.
Range of the dB setting value: -120 dBm ~ +120 dBm. The default is 0 dBm.
You can either let the instrument automatically measure this value, or you can enter
a specified value.
- DM3061/2/4 1
- DM3051/2/4 1
- Safety Notices 4
- Safety Terms and Symbols 6
- General-Purpose Multimeter 7
- and so on 8
- Content 10
- Chapter 1 Quick Start 13
- General Inspection 14
- Handle Adjustment 15
- To Measure DC Voltage 18
- To Measure AC Voltage 20
- To Measure DC Current 22
- To Measure AC Current 24
- To Measure Resistance 26
- Terminal) 28
- To Measure Capacitance 30
- To Test Continuity 32
- Open or Closed Circuit 33
- To Check Diodes 34
- Figure 1- 30 Check Diodes 35
- Forward Bias 35
- Frequency Test 36
- Period Test 38
- To Measure Sensor 40
- To Choose Reading Resolution 46
- To Choose Data Digit Display 47
- To Choose Range Options 48
- To Control Trigger Options 50
- Continue Resistance 53
- AC Filter 54
- DC Input Impedance 55
- Null Measurement 56
- Ratio Measurement 58
- Frequency Measurement 60
- Math Functions 62
- Math Functions Selective 64
- 1. Statistic Measurement 65
- 2. Limit Measurement 66
- 3. dB Measurement 67
- 4. dBm Measurement 68
- Auto Triggering 70
- Single Triggering 73
- External Triggering 74
- To Set up the VMC 76
- Store and Recall 77
- Local/U-Disk Storage 78
- Document Storage 79
- Document Operation 81
- To Set Up the Utility 82
- Set Up the I/O System 83
- Set Up LAN I/O Parameter 84
- Set Up GPIB I/O Parameter 87
- Set Up RS-232 I/O Parameters 88
- System settings 89
- Select languages 90
- Set Up the Display 91
- Beeper On/Off 92
- Set Up System date/time 93
- Set Up Digit Format 94
- Notice: 95
- Factory Defaults Setting 96
- High-Speed Data Log 98
- 1. Data Log rate 101
- 3. The Data log stop 104
- Multi-Route Scanning 106
- To set up the Scanning task 109
- 2．To Edit the Scanning task 112
- 3． To load the scanning task 113
- Example 3: dBm Measurement 120
- Example 4: dB Measurement 121
- Figure 3- 8 122
- Example 5: Limit Test 123
- Do these steps as following: 124
- Example 7: Reading Hold 129
- Prompting Message 131
- Troubleshooting 133
- Chapter 5 Characteristics 135
- AC Characteristics 137
- 0 ℃ to (Tcal–5 ℃) (Tcal 139
- Capacitance Characteristics 140
- Measuring Characteristics 141
- Characteristics for DM305x 145
- 0 ℃ to 18 ℃ 149
- 28 ℃ to 55 ℃ 149
- Chapter 6 Appendix 155
- Appendix B: Warranty 156
- RIGOL 157
- Appendix D: Contact RIGOL 158
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