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Keysight Technologies 34951T User Manual
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Keysight Technologies 34951T User Manual

Keysight Technologies 34951T User Manual

4-channel isolated d/a converter with waveform memory module
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Keysight 34951A 4-Channel
Isolated D/A Converter with
Waveform Memory Module
User's Guide

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Summary of Contents for Keysight Technologies 34951T

  • Page 1 Keysight 34951A 4-Channel Isolated D/A Converter with Waveform Memory Module User’s Guide...

  • Page 2: Copyright Notice

    EXPRESS OR IMPLIED, WITH REGARD agreement and written consent from customarily provided to the public. TO THIS MANUAL AND ANY Keysight Technologies as governed by Accordingly, Keysight provides the INFORMATION CONTAINED HEREIN, United States and international Software to U.S. government INCLUDING BUT NOT LIMITED TO THE copyright laws.

  • Page 3: Safety Symbols

    Safety Symbols The following symbols or markings that may be on or with the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument. Alternating current (AC) Frame or chassis (ground) terminal Standby supply.

  • Page 4: Additional Safety Notices

    Additional Safety Notices The following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or with specific warnings or instructions elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability of the customer’s failure to comply with the requirements.
  • Page 5 GROUND THE INSTRUMENT WARNING This is a Safety Protection Class I Product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous.
  • Page 6 The detachable power cord is the instrument disconnecting device. It WARNING disconnects the mains circuits from the mains supply before other parts of the instrument. The front panel switch is only a standby switch and is not a LINE switch (disconnecting device). The instrument power cord does not disconnect or de-energize external circuits connected to the analog bus, terminal blocks or modules.
  • Page 7 Removal of the instrument's cover is to be conducted by qualified personnel WARNING only. Only qualified, trained personnel who are aware of the hazards involved should remove instrument covers. Prevent operators from accessing any external circuits, test fixtures, cables or wherever hazardous voltages may be present.

  • Page 8: Environmental Conditions

    Environmental Conditions Keysight 34980A is designed for indoor use in an installation category II and low condensation environment. Table below shows the general environmental conditions for this instrument. Refer to the product data sheet at https://literature.cdn.keysight.com/litweb/pdf/5989-1437EN.pdf for more information on the instrument general specifications. General specifications Requirement Operating condition: 0°C to 55°C...

  • Page 9: Regulatory Markings

    Regulatory Markings The CE mark is a registered trademark of the European Community. This CE The CSA mark is a registered trademark of the Canadian mark shows that the product complies with all the relevant European Legal Standards Association. Directives. The UK conformity mark is a UK The Keysight email address is required government owned mark.
  • Page 10 This symbol indicates the time period This instrument complies with the during which no hazardous or toxic WEEE Directive (2002/96/EC) marking substance elements are expected to requirement. This affixed product label leak or deteriorate during normal use. indicates that you must not discard Forty years is the expected useful life this electrical or electronic product in of the product.

  • Page 11: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/Ec

    Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC The crossed out wheeled bin symbol indicates that separate collection for waste electric and electronic equipment (WEEE) is required, as obligated by the EU DIRECTIVE and other National legislation. Please refer to keysight.com/go/takeback to understand your Trade in options with Keysight in addition to product takeback instructions.
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  • Page 13: Table Of Contents

    ......25 34951T Terminal Block ........26...
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  • Page 15: 34951A 4-Channel Isolated D/A Converter With Waveform Memory Module

    34951A 4-Channel Isolated D/A Converter with Waveform Memory Module The 34951A 4-Ch Isolated D/A module (DAC module) has four independent, isolated DAC channels that output DC voltage up to 16V or DC current up to 20 mA (Level Output Mode). Since the DACs are electrically isolated, you can stack or combine multiple DACs to have up to 64 V on a module.

  • Page 16: Waveform (Trace) Mode

    Each channel can also generate current between -20 mA and +20 mA at 630 nA resolution. When outputting current the High Sense and Low Sense terminals are not used and are opened. For protection, each channel incorporates a fuse that will open at greater than 20 mA. If an overload condition exists, the fuse will open, but no error or SRQ will be generated.

  • Page 17: Clock Out

    Clock Out There is one clock output on the DAC module, which you can configure to output at frequencies up to 10 MHz. Since it uses a 16-bit clock divisor, the available output frequencies range in steps of 20 MHz/2 with a minimum output frequency of 305 Hz.
  • Page 18 Because the auto-cal uses the internal DMM, do not route signals on ABus1 WARNING when performing an auto-cal of a DAC module. Do not apply a signal to ABus1 via the Analog Bus connector on the rear of the mainframe (pins 4, 5, and 9).

  • Page 19: 34951A Scpi Programming Examples

    34951A SCPI Programming Examples The programming examples below provide you with SCPI command examples to use for actions specific to the DAC module. The slot and channel addressing scheme used in these examples follow the form sccc where s is the mainframe slot number (1 through 8) and ccc is the three-digit channel number.
  • Page 20 TRACe:FUNCtion 4,SINusoid, TEST_SINE, 1000 SOURce:FUNCtion:TRACe TEST_SINE,(@4001,4002) OUTPut:STATe ON,(@4001,4002) SOURe:FUNCtion:ENABle ON,(@4001,4002) Example: Downloading trace points to memory and outputting waveform from DACs The following command segment downloads seven trace points to memory on the module in slot 4 and output the waveform from DAC channels 1 and 2. The trace name is "NEG_RAMP".

  • Page 21: External Clock

    External Clock Example: Selecting an external clock source and setting a clock divisor The first command selects the external clock source on DAC channels 1 and 2 in slot 4. The external clock input is shared between these two channels. The second command sets the clock divisor to 100 on the same DAC channels (the external clock input signal is divided by 100).

  • Page 22: Configuring A Dac Module

    The following command performs an auto-cal of all 34951A DAC modules in a mainframe. CALibration:MODule? ALL Example: Effects of using the secure state command on storing calibration constants The following command removes instrument security, and the calibration constants are stored in non-volatile memory if sent before the CALibration:MODule? command.

  • Page 23: 34951A Simplified Block Diagrams

    34951A Simplified Block Diagrams The following diagram shows how the module is generally configured. 34951A Module User-Supplied Connections Ext Clock Out Ext Trig Out Enable Enable Int Clock Int Trig Ext Clock In/Out Ext Trig In/Out 16 Bits Channel 001 16 Bits Channel 002 16 Bits...
  • Page 24 The following diagram shows individual DAC channel configuration. All channels are configured the same. 34951A Module User-Supplied Connections Calibration Constant (non-volatile memory) Sense relays are not closed in current output mode DAC x <ch#> H Sense (voltage) (1 of 4 Channels) Immediate <ch#>...

  • Page 25: 34951A D-Sub Connector Pinout

    34951A D-Sub Connector Pinout 50-Pin D-Sub Female Connector TRIG Sense Sense Sense Sense Sense Sense Sense Sense GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND Description Socket Description Socket Description Socket Description Socket Description...

  • Page 26: 34951T Terminal Block

    34951T Terminal Block Each terminal block is labeled with the model number and the abbreviated module name. In addition, space is available on the label for you to write the slot number. Wire Size: 20 AWG Typical 18 AWG Max...
  • Page 27 Index auto-calibration terminal block trigger output source triggering a DAC calibration clock input clock output wiring log connector pinouts description D-sub pinouts external clock input module description overload fuse pinouts programming examples remote sensing safety notices sense terminals simplified block diagrams synchronization Keysight 34951A User’s Guide...
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  • Page 29 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2008-2022 Edition 4, Aug 2022 Printed in Malaysia  34980-90051 www.keysight.com...

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