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Features and Functions 3
Agilent 34980A Mainframe User’s Guide 105
Frequency Measurement Configuration
This section contains information to help you configure the instrument for
making frequency measurements.
Low Frequency Timeout
The instrument uses three different timeout ranges for frequency
measurements. The instrument selects the slow (3 Hz), medium (20 Hz),
or fast (300 Hz) filter based on the input frequency that you specify with
this command for the selected channels.
Applies to frequency measurements only.
Timeouts for Specified Frequency Range Settings:
• The
CONFigure and MEASure? commands automatically select the 20 Hz
(medium) filter.
• The instrument selects the default 20 Hz (medium) filter 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: DMM or Channel (Configure) > AC FILTER
Remote Interface Operation: Specify the lowest frequency expected in the
input signal on the specified channels. The instrument selects the
appropriate timeout based on the frequency you specify (see table above).
[SENSe:]FREQuency:RANGe:LOWer {3|20|200} [,(@<ch_list>)]
If you omit the optional <ch_list> parameter, the command applies to the
internal DMM.
Input Frequency Timeout
3 Hz to 300 kHz (Slow)
20 Hz to 300 kHz (Medium)
200 Hz to 300 kHz (Fast)
1 second
100 ms
10 ms
- 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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