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118 Agilent 34980A Mainframe User’s Guide
3 Features and Functions
• The sweep count is valid only while scanning. If no channels have been
assigned to the scan list, the specified sweep count is ignored (no error
is generated).
• You can specify a sweep count in conjunction with a trigger count and
a sample count. The three parameters operate independent of one
another, and the total number of readings returned will be the product
of the three parameters.
• You can store at least 500,000 readings in memory and all readings are
automatically time stamped. If memory overflows, the new readings will
overwrite the first (oldest) readings stored; the most recent readings are
always preserved.
• The
CONFigure and MEASure? commands automatically set the sweep
count to 1 sweep.
• The instrument sets the sweep count to 1 after a Factory Reset
(
*RST command). An Instrument Preset (SYSTem:PRESet command) or
Card Reset (
SYSTem:CPON command) does not change the setting.
Front Panel Operation: Scan (Configure) > SWEEP COUNT
Remote Interface Operation: SWEep:COUNt
Sample Count
The sample count sets the number of auto- triggered samples the internal
DMM will take per channel per trigger. The sample count applies to both
scanning and stand- alone DMM measurements (with no scan list). The
front- panel sample annunciator (“ * ”) turns on during each measurement.
Sample count for Stand-Alone DMM Mode
t
Sample Count
(1 to 500,000 samples)
Trigger Trigger
- Agilent 34980A 1
- Multifunction 1
- Switch/Measure Unit 1
- *34980-90005* 1
- Additional Safety Notices 3
- Contents 5
- Introduction to the 34980A 9
- Data Acquisition Overview 10
- Measurement Software 11
- 1 Introduction to the 34980A 12
- Web Browser Interface 12
- Data Acquisition Circuitry 13
- Plug-In Modules 14
- System Cabling 14
- Transducers and Sensors 15
- Signal Routing and Switching 16
- Matrix Switching 17
- General Purpose Switching 17
- RF and Microwave Switching 18
- Measurement Input 19
- Main System Processor 20
- The Digital Modules 24
- Tota li z e r 25
- Control Output 26
- Voltage (DAC) Output 27
- 16V or dc current up to 27
- Getting Started 29
- Front Panel at a Glance 30
- Rear Panel at a Glance 31
- Rear Panel Connector Pinouts 32
- Removing a Slot Cover 34
- Installing a Module 35
- 2 Getting Started 36
- Wiring a Terminal Block 37
- Installing a Terminal Block 38
- Getting Started 2 39
- Instrument Rack Mounting 40
- Front Panel Menu Reference 43
- Configure Key Group 44
- Using the Measure Keys 47
- Connecting Over LAN 54
- Connecting Via Site LAN 55
- Connecting Over GPIB 59
- Connecting Over USB 60
- Communicating with the 34980A 61
- Launching the Web Interface 62
- Analog Bus Overview 65
- 34980A Documentation Map 69
- Features and Functions 71
- Module and Channel Status 72
- Menu Choices 72
- Readings 72
- Annunciators 72
- Front Panel Controls 73
- Basic Operating Modes 74
- SCPI Commands 74
- GPIB Interface 77
- LAN Interface 77
- Analog Buses 92
- Measurement Functions 93
- Measurement Range 94
- Measurement Resolution 95
- Custom A/D Integration Time 96
- Autozero 97
- Trigger Delay 98
- Automatic Trigger Delays 99
- Safety Interlock 100
- User-Defined Channel Labels 101
- 3 Features and Functions 102
- 2-Wire Versus 1-Wire Mode 103
- Measurement Units 104
- Thermocouple Measurements 105
- RTD Measurements 106
- Thermistor Measurements 108
- DC Input Resistance 109
- AC Low Frequency Filter 110
- Remote Interface Operation: 111
- Low Frequency Timeout 113
- Mx+B Scaling 114
- Front Panel Operation: 115
- Scanning 116
- Features and Functions 3 117
- Scan Trigger Source 120
- Manual Scanning 121
- Scanning on Alarm 122
- External Scanning 124
- Trigger Count 125
- Sweep Count 125
- Sample Count 126
- (1 to 500,000 samples) 126
- Trigger Trigger 126
- Channel Delay 128
- Automatic Channel Delays 129
- Relative Format (Default): 131
- Absolute Format: 131
- Non-Sequential Scanning 132
- Monitor Mode 135
- Alarm Limits 140
- Upper Limit 141
- Lower Limit 141
- Alarm Event No Alarm 141
- Viewing Stored Alarm Data 143
- Using the Alarm Output Lines 144
- Sequences 148
- ROUT:SEQ:DEF? MYSEQ_1 151
- Executing a Sequence 152
- Deleting Sequences 154
- System-Related Operations 155
- CANCEL 156
- Error Conditions 158
- Front-Panel Display Control 159
- Front-Panel Number Format 160
- Internal DMM Disable 161
- Relay Cycle Count 162
- SCPI Language Version 162
- Calibration Overview 163
- Calibration Count 164
- Calibration Message 165
- Factory Reset State 166
- Instrument Preset State 168
- Agilent Technologies 171
- Comments 173
- ±300V 1A 45 MHz 100 <3 173
- General Considerations 176
- per channel 177
- Vrms or VDC, 177
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