Agilent 34980A  Multifunction Switch/Measure Unit 34980-90005

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3 Features and Functions AC Low Frequency Filter The instrument uses three different ac filters which enable you to either optimize low- frequency accuracy or achieve faster ac settling times. The instrument selects the slow (3 Hz), medium (20 Hz), or fast (300 Hz) filter based on the input frequency that you specify for the selected channels or the internal DMM. Applies to ac voltage and ac current measurements only. AC Filter Settings for Voltage Measurements: Input Frequency Default Settling Delay Minimum Settling Delay 3 Hz to 300 kHz (Slow) 20 Hz to 300 kHz (Medium) 200 Hz to 300 kHz (Fast) 7 seconds / reading 1 second / reading 0.12 seconds / reading 1.5 seconds 200 ms 20 ms 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 filter based on the frequency you specify (see table above). [SENSe:]VOLTage:AC:BANDwidth {3|20|200} [,(@)] If you omit the optional parameter, the command applies to the internal DMM. 102 Agilent 34980A Mainframe User’s Guide
Resistance Measurement Configuration Features and Functions 3 This section contains information to help you configure the instrument for making resistance measurements. Use the 2- wire method for ease of wiring and higher density or use the 4- wire method for improved measurement accuracy. The measurement ranges shown below. Offset Compensation 100 1 k 10 k 100 k 1 M 10 M 100 M Autorange Offset compensation removes the effects of any dc voltages in the circuit being measured. The technique involves taking the difference between two resistance measurements on the specified channels, one with the current source turned on and one with the current source turned off. Applies only to 2- wire and 4- wire resistance measurements on the 100, 1 k, and 10 k ranges. Four- wire measurements are not allowed on the multiplexer modules configured for the 1- wire (single ended) mode (see page 95). For 4- wire resistance measurements, the instrument automatically pairs channel n in Bank 1 with channel n+20 in Bank 2 (34921A, 34923A, 34925A) or n+35 (34922A, 34924A) to provide the source and sense connections. For example, make the source connections to the HI and LO terminals on channel 2 in Bank 1 and the sense connections to the HI and LO terminals on channel 22 (or 37) in Bank 2. The CONFigure and MEASure? commands automatically disable offset compensation. The instrument disables offset compensation 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) > OFFSET COMP Remote Interface Operation: [SENSe:]FRESistance:OCOMpensated {OFF|ON} [,(@)] [SENSe:]RESistance:OCOMpensated {OFF|ON} [,(@)] If you omit the optional parameter, the command applies to the internal DMM. For 4- wire measurements, specify the paired channel in Bank 1 (source) as the channel (channels in Bank 2 are not allowed in the ). Agilent 34980A Mainframe User’s Guide 103
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Agilent 34980A Multifunction Switc
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Menu Example 4: Configuring a Chann
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1 Introduction to the 34980A Data A
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1 Introduction to the 34980A Plug-I
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2 Getting Started Front Panel at a
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2 Getting Started Rear Panel Connec
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2 Getting Started Installing and Co
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2 Getting Started Configure Key Gro
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2 Getting Started Menu Example 2: O
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2 Getting Started 11 To stop the co
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2 Getting Started Connecting Over L
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2 Getting Started 4 Press EXIT MENU
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3 Features and Functions You can di
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3 Features and Functions Calibratio
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3 Features and Functions Factory Re
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3 Features and Functions Instrument
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4 Introduction to the Plug-In Modul
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Index date, 153 dc current measurem
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Index Sequence key, 36 sequences ca
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Index 176 Agilent 34980A Mainframe
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Agilent 34980A  Multifunction Switch/Measure Unit 34980-90005