Agilent Technologies N3280A User Manual Page 40
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5 - Programming the DC Source
40
Overvoltage Protection
The dc source will turn off its output and open the output relays if the output voltage exceeds +11.5V
( ±0.3V) or −11.5V ( ±0.3V) when measured at the output terminals. Overvoltage protection is only
available when operating in voltage priority mode. It is enabled with:
VOLT:PROT:STAT<bool>,(@<channel list>)
where <bool> is the protection state (0 | OFF; 1 | ON).
CAUTION: If overvoltage protection is disabled, the dc source or the equipment under test will not
be protected from excessive external voltages.
Output Current
When operating in voltage priority mode, the dc source has a programmable current limit, which applies
to both positive and negative output currents. The command to program the current limit is:
CURR:LIM <n>,(@<channel list>)
where <n> is the current limit in amperes.
If the load attempts to draw more current than the programmed limit, the output voltage is reduced to
keep the current within the limit.
To query the maximum output current limit that can be programmed, use:
CURR:LIM? MAX,(@<channel list>)
When operating in current priority mode, the dc source has a programmable output current. The
maximum output current that can be programmed in current priority mode is ±0.5125 mA. The command
to program the current is:
CURR <n>,(@<channel list>)
To query the programmed output current setting for output 1, use:
CURR?,(@<channel list>)
Output Mode
You can program the unit to operate in either voltage priority or current priority mode. In voltage priority
mode the output is controlled by a constant voltage feedback loop, which maintains the output voltage at
its programmed setting. In current priority mode the output is controlled by the constant current feedback
loop, which maintains the output load or source current at its programmed setting.
Use the following command to configure the output mode:
FUNC:MODE <mode>,(@<channel list>)
where <mode> is the operating mode (VOLT | CURR)
NOTE: If the output is on, changing the output mode will cause the output to turn OFF, cycle
modes, and then turn ON. Also, there is no interaction or coupling between modes.
Switching back and forth between modes does not change the programmed values.
- USER’S GUIDE 1
- Warranty Information 2
- Safety Summary 3
- Declaration Page 5
- Acoustic Noise Information 6
- Printing History 6
- Table of Contents 7
- PROGRAMMING THE DC SOURCE 39 8
- LANGUAGE DICTIONARY 53 9
- SPECIFICATIONS 79 10
- ERROR MESSAGES 103 11
- LINE VOLTAGE SELECTION 107 11
- INDEX 111 11
- General Information 13
- Options and Accessories 14
- Description 14
- Output Characteristics 15
- Current Priority Operation 16
- Measurement Characteristics 17
- Start of a Measurement 18
- Installation 19
- Location 20
- Power Connections 21
- Outputs 1 - 4 22
- Current Ratings 23
- Coaxial Guard Connections 24
- External Trigger Connections 25
- Computer Connections 25
- 4 3 2 1 0 26
- Address = 5 26
- Turn-On Checkout 27
- Checkout Procedure 28
- In Case of Trouble 29
- Introduction to Programming 31
- Moving Among Subsystems 33
- Including Common Commands 33
- Using Queries 33
- Types of SCPI Messages 34
- SCPI Data Formats 35
- SCPI Command Completion 36
- Using Device Clear 37
- Programming the DC Source 39
- Overvoltage Protection 40
- Output Current 40
- Output Mode 40
- Oscillation Protection 41
- Output Trigger Model 41
- Making Measurements 43
- Power Line Cycles 44
- Triggered Measurements 45
- Measurement Trigger Model 46
- Output Settling Delay 47
- Operation Status Group 50
- Questionable Status Group 51
- Standard Event Status Group 51
- Status Byte Register 51
- Language Dictionary 53
- 6 – Language Dictionary 54
- Language Dictionary - 6 55
- Calibration Commands 57
- CALibrate:DATA 58
- CALibrate:DATE 58
- CALibrate:LEVel 58
- CALibrate:PASSword 58
- CALibrate:SAVE 59
- CALibrate:STATe 59
- CALibrate:VOLTage 59
- Measurement Commands 60
- MEASure:ARRay:CURRent? 61
- MEASure:ARRay:VOLTage? 61
- MEASure:CURRent? 61
- MEASure:VOLTage? 61
- SENSe:CURRent:RANGe 61
- SENSe:FUNCtion 62
- SENSe:SWEep:NPLCycles 62
- SENSe:SWEep:OFFSet:POINts 62
- SENSe:SWEep:POINts 63
- SENSe:SWEep:TINTerval 63
- SENSe:WINDow 63
- Output Commands 64
- [SOURce:]CURRent[:IMMediate] 65
- [SOURce:]CURRent:TRIGgered 65
- [SOURce:]CURRent:LIMit:BWIDth 65
- [SOURce:]CURRent:MODE 66
- [SOURce:]CURRent:LIMit:MODE 66
- [SOURce:]DELay 66
- [SOURce:]DELay:MODE 66
- [SOURce:]FUNCtion:MODE 67
- [SOURce:]VOLTage:ALC:BWIDth 67
- [SOURce:]VOLTage[:IMMediate] 67
- [SOURce:]VOLTage:TRIGgered 67
- [SOURce:]VOLTage:MODE 68
- Status Commands 69
- STATus:OPERation:NTR 70
- STATus:OPERation:PTR 70
- STATus:PRESet 70
- STATus:QUEStionable[:EVENt]? 70
- STATus:QUEStionable:ENABle 71
- STATus:QUEStionable:NTR 71
- STATus:QUEStionable:PTR 71
- System Commands 72
- Trigger Commands 73
- TRIGger:ACQuire:SOURce 74
- TRIGger[:TRANsient]:SOURce 74
- TRIGger[:TRANsient] 74
- Common Commands 75
- 6 – Language Dictionary 76
- Language Dictionary - 6 77
- Table 6-7. *RST Settings 77
- Specifications 79
- A - Specifications 80
- Specifications - A 81
- Introduction 83
- Equipment Required 83
- Measurement Techniques 84
- Electronic Load 85
- Programming 85
- Test Setup 85
- Voltage Priority Tests 86
- Negative Current Limit (-CL) 87
- Current Priority Tests 88
- Load Effect Tests 89
- Source Effect Tests 91
- Ripple and Noise Tests 94
- Transient Response Tests 95
- Transient 96
- Performance Test Record Form 98
- Enable Calibration Mode 99
- Calibration 101
- Calibration Error Messages 102
- Error Messages 103
- C – Error Messages 104
- Error Messages - C 105
- Line Voltage Selection 107
- Rear Panel Pinout Assignments 109
- Mating Connector Part Numbers 109
- Manual Updates 116
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