VXI SVM2608 Sample Points, Sample Rate, Trigger Event Forced Trigger, Calibration Commands

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0x0016 = 20 V Measurement

0x0017 = 50 V Measurement

0x0018 = 100 V Measurement

0x0019 = Auto Voltage Measurement

0x0021 = 0.5 V Range Voltage Measurement (for Channels 4-5 Only)

0x0022 = 100 Ω Range Resistance Measurement - Offset Method (2-wire) 0x0023 = 1 kΩ Range Resistance Measurement - Offset Method (2-wire) 0x0024 = 10 kΩ Range Resistance Measurement - Offset Method (2-wire) 0x0025 = 100 kΩ Range Resistance Measurement - Offset Method (2-wire) 0x0026 = 1 MΩ Range Resistance Measurement - Offset Method (2-wire)

0x0027 = Auto-Range Resistance Measurement - Offset Method (2-wire) 0x0028 = 100 Ω Range Resistance Measurement - Offset Method (4-wire) 0x0029 = 1 kΩ Range Resistance Measurement - Offset Method (4-wire)

0x002A = 10 kΩ Range Resistance Measurement - Offset Method (4-wire) 0x002B = 100 kΩ Range Resistance Measurement - Offset Method (4-wire) 0x002C = 1 MΩ Range Resistance Measurement - Offset Method (4-wire)

0x002D = Auto-Range Resistance Measurement - Offset Method (4-wire) 0x002E = 100 Ω Range Resistance Measurement - Dynamic Method (2-wire) 0x002F = 1 kΩ Range Resistance Measurement - Dynamic Method (2-wire) 0x0030 = 10 kΩ Range Resistance Measurement - Dynamic Method (2-wire) 0x0031 = 100 kΩ Range Resistance Measurement - Dynamic Method (2-wire) 0x0032 = 1 MΩ Range Resistance Measurement - Dynamic Method (2-wire) 0x0033 = Auto-Range Resistance Measurement - Dynamic Method (2-wire) 0x0034 = 100 Ω Range Resistance Measurement - Dynamic Method (4-wire) 0x0035 = 1 kΩ Range Resistance Measurement - Dynamic Method (4-wire) 0x0036 = 10 kΩ Range Resistance Measurement - Dynamic Method (4-wire) 0x0037 = 100 kΩ Range Resistance Measurement - Dynamic Method (4-wire) 0x0038 = 1 MΩ Range Resistance Measurement - Dynamic Method (4-wire) 0x0039 = Auto-Range Resistance Measurement - Dynamic Method (4-wire)

The pre-set values are as follows:

 

SAMPLE POINTS

1667

SAMPLE RATE

10 µs

RANGE/TYPE (2- or 4-wires resistance)

Implicit in the command definition.

FILTER

This setting is unaltered by the processor

 

and remains at the value set previously.

TRIGGER EVENT

FORCED TRIGGER

When one of these commands is issued, the microprocessor performs a Data Capture, it calculates the result and returns the result in the corresponding result register. This gives a measurement over one 60 Hz power line cycle to help reject power line noise.

Calibration Commands

The following commands are used at the factory to calibrate the equipment and are presented here for reference only.

SVM2608 Programming

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Contents SVM2608 VXI Technology, Inc Table of Contents Self Test Command Limitation of Warranty WarrantyCertification Restricted Rights LegendSteve Mauga, QA Manager EMCTerms and Symbols Service should only be performed by qualified personnelUse Proper Power Cord Use Proper Power SourceGround the Product Avoid Electric ShockOperating Conditions Improper UseVXI Technology Cleveland Instrument Division VXI Technology World HeadquartersVXI Technology Lake Stevens Instrument Division Technical SupportVXI Technology, Inc SVM2608 Preface Overview IntroductionScale Triggering Acquiring DataLinear Mode Delayed TriggerPre-Trigger Commands Fifo ModeCalibrations Test BusOption SVM2608 Block Diagram Physical Description SVM2608 Environmental SpecificationsGND CH1I CH3I Front Panel Interface WiringGND CH1I+ GND CH3I+ Exttrigin CH0I CH2IMtbf SVM2608 SpecificationsOption 1 SVM2608-01 VXI Technology, Inc SVM2608 Introduction Setting the Chassis Backplane Jumpers Calculating System Power and Cooling RequirementsRotary Switch Locations Setting the Base AddressExample Divide DecimalMSB LSB Module INSTALLATION/REMOVAL Switch to C and the front switch toFunction Offset Device Memory MapsReserved Register OffsetMS = Most Significant LS = Least Significant SVM2608 A32 Register MAP0x72 Command Register Channel 0x74 Databyte Ordering Determining the Register Address Accessing the Registers Description of RegistersSysfailctl INTLVL2 Force Trigger, Start Register 0x02 Read & WriteHSTRIGSRC2 EXT Trig SlopeTimeoutctl ReservedExternal Trigger Level 0x06 Read & Write 4WIREOHMS 2WIREOHMSLINEAR/FIFO ATTN-GAIN1-GAIN0Sample Rate 0x0C, 0x34, 0x5C, 0x84 Read & Write Sample Rate 0x0E, 0x36, 0x5E, 0x86 Read & WriteKHz Channels 0-3/5 MHz Channels 4-5 LPF Control This bit Sample Rate, High-Speed 0xAE, 0xD6 Read & Write Sample Rate, High-Speed 0xAC, 0xD4 Read & WriteTimeout 0x1C, 0x44, 0x6C, 0x94, 0xBC, 0xE4 Read & Write Fifo Data 0x24, 0x4C, 0x74, 0x9C, 0xC4, 0xEC Read Only Fifo Data 0x26, 0x4E, 0x76, 0x9E, 0xC6, 0xEE Read OnlyReserved Registers 0xF8 0xFC Trigger Delay = Measurement Commands Microprocessor CommandsCaptured Data Calculations Self Test Command Resistance Measurement Offset MethodResistance Measurement Dynamic Method Example Preset Setting Measurement CommandsSample Points Calibration CommandsSample Rate Trigger Event Forced TriggerPage Error Processing There are no errors in the queue Diagnostic Commands Changes become effective the next time the module powers up Examples Example 2 Setting Channel 2 to Acquire 200,000 SamplesExample 3 Setting Channel 2 to Pre-acquire 100,000 Samples Timeout Register = Timeout Base * 213 + Timeout Counter Timeout Counter = Timeout / Timeout Base ClockVXI Technology, Inc SVM2608 Programming Data Swapping Example Appendix aVXI Technology, Inc SVM2608 Appendix a Index
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