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TiePie Handyscope HS4 DIFF-5MHz Instrument Manual

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Handyscope HS4 DIFF
Instrument manual
Rev. 2.1
TiePie engineering

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  • Page 1 Handyscope HS4 DIFF Instrument manual Rev. 2.1 TiePie engineering...
  • Page 2 Measuring directly on the line voltage can be very dan- gerous. Despite the care taken for the compilation of this user manual, TiePie engineering can not be held responsible for any damages resulting from errors that may appear in this book.

  • Page 3: Table Of Contents

    Contents 1 Safety 2 Declaration of confirmity 3 Introduction 3.1 Differential input ....3.1.1 Differential attenuators ... . 3.1.2 Differential test lead .
  • Page 4 8.1 Acquisition system ....33 8.2 BNC inputs Ch1 – Ch4 ....33 8.3 Trigger system .

  • Page 5: Safety

    flammable gases or fumes. Do not use the equipment if it does not operate properly. Have the equipment inspected by qualified service personal. If necessary, return the equipment to TiePie engineering for service and repair to ensure that safety features are main- tained.
  • Page 6 Chapter 1...

  • Page 7: Declaration Of Confirmity

    8601 WL Sneek The Netherlands EC Declaration of confirmity We declare, on our own responsibility, that the product Handyscope HS4 DIFF-5MHz Handyscope HS4 DIFF-10MHz Handyscope HS4 DIFF-25MHz Handyscope HS4 DIFF-50MHz for which this declaration is valid, is in compliance with...
  • Page 8 Chapter 2...

  • Page 9: Introduction

    Introduction Before using the Handyscope HS4 DIFF first read chapter about safety. Many technicians investigate electrical signals. Though the mea- surement may not be electrical, the physical variable is often con- verted to an electrical signal, with a special transducer. Common transducers are accelerometers, pressure probes, current clamps and temperature probes.
  • Page 10 input is always connected to ground and the other side to the point of interest in the circuit under test. Figure 3.1: Single ended input Therefore the voltage that is measured with an oscilloscope with standard, single ended inputs is always measured between that specific point and ground.

  • Page 11: Differential Attenuators

    Figure 3.2: Differential input A differential input is not referenced to ground, but both sides of the input are ”floating”. It is therefore possible to connect one side of the input to one point in the circuit and the other side of the input to the other point in the circuit and measure the voltage difference directly.
  • Page 12 Figure 3.4: Differential input Standard oscilloscope probes and attenuators only attenuate one side of the signal path. These are not suitable to be used with a differential input. Using these on a differential input will have a negative effect on the CMRR and will introduce measurement errors.

  • Page 13: Differential Test Lead

    a dangerous voltage. It will also influence the measurements and create measurement errors. do not connect the outside of the two BNC’s of the attenuator to each other as this will short circuit a part of the internal circuit and will create measurement errors do not connect the outside of the BNC’s of two or more at- tenuators that are connected to different channels of the Han- dyscope HS4 Diff...

  • Page 14: Sample Frequency

    Figure 3.6: Sampling The sine wave in figure is sampled at the dot positions. By connecting the adjacent samples, the original signal can be recon- structed from the samples. You can see the result in figure 3.7. Figure 3.7: ”connecting” the samples Sample frequency The rate at which the samples are taken is called the sampling frequency, the number of samples per second.

  • Page 15: Aliasing

    Figure 3.8: The effect of the sampling frequency The sampling frequency must be higher than 2 times the highest frequency in the input signal. This is called the Nyquist fre- quency. Theoretically it is possible to reconstruct the input signal with more than 2 samples per period.
  • Page 16 signals with a frequency ranging from 0 to 500 Hz. This means that from the resulting frequencies in the table, we can only see the 250 Hz signal in the sampled data. This signal is called an alias of the original signal. If the sampling frequency is lower than twice the frequency of the input signal, aliasing will occur.

  • Page 17: Digitizing

    Digitizing When digitizing the samples, the voltage at each sample time is converted to a number. This is done by comparing the voltage with a number of levels. The resulting number is the number cor- responding to the level that is closest to the voltage. The number of levels is determined by the resolution, according to the following relation: LevelCount = 2 The higher the resolution, the more levels are available and the...
  • Page 18 coupled to the input circuit. All signal components available in the input signal will arrive at the input circuit and will be measured. In the setting AC, a capacitor will be placed between the input connector and the input circuit. This capacitor will block all DC components of the input signal and let all AC components pass through.

  • Page 19: Driver Installation

    Where to find the driver setup The driver setup program and measurement software can be found in the download section on TiePie engineering’s website and on the CD-ROM that came with the instrument. It is recommended to install the latest version of the software and USB driver from the website.
  • Page 20 installation of a driver on a system and also to update an existing driver. The screen shots in this description may differ from the ones dis- played on your computer, depending on the Windows version. Figure 4.1: Driver install: step 1 When drivers were already installed, the install utility will remove them before installing the new driver.
  • Page 21 Figure 4.2: Driver install: step 2 When the instrument is still connected, the driver install utility will recognize it and report this. You will be asked to continue anyway. Figure 4.3: Driver install: Instrument is still connected Clicking No will bring back the previous screen. The instrument should now be disconnected.
  • Page 22 Figure 4.4: Driver install: step 3 On Windows XP and newer, the installation may inform about the drivers not being ”Windows Logo Tested”. The driver is not causing any danger for your system and can be safely installed. Please ignore this warning and continue the installation. Figure 4.5: Driver install: step 4 Chapter 4...
  • Page 23 The driver install utility now has enough information and can in- stall the drivers. Clicking Install will remove existing drivers and install the new driver. A for the new driver is added to the software applet in the Windows control panel. Figure 4.6: Driver install: step 5 As mentioned, Windows XP SP2 and newer may warn for the USB drivers not being Windows Logo tested.
  • Page 24 Figure 4.8: Driver install: Finished Chapter 4...

  • Page 25: Hardware Installation

    Hardware installation Drivers have to be installed before the Handyscope HS4 DIFF is connected to the computer for the first time. See chapter for more information. Power the instrument The Handyscope HS4 DIFF is powered by the USB, no external power supply is required.

  • Page 26: Connect The Instrument To The Computer

    Handyscope HS4 DIFF. Refer to paragraph for specifications of the external power intput. Connect the instrument to the computer After the new driver has been pre-installed (see chapter 4), the Handyscope HS4 DIFF can be connected to the computer. When the Handyscope HS4 DIFF is connected to a USB port of the com- puter, Windows will report new hardware.

  • Page 27: Found New Hardware Wizard

    5.2.1 Found New Hardware Wizard Figure 5.1: Hardware install: step 1 This window will only be shown in Windows XP SP2 or newer. No drivers for the Handyscope HS4 DIFF can be found on the Windows Update Web site, so select No, not this time and click Next .
  • Page 28 Figure 5.2: Hardware install: step 2 Since the drivers are already pre-installed on the computer, Win- dows will be able to find them automatically. Select Install the software automatically and click Next . Figure 5.3: Hardware install: step 3 The New Hardware wizard will now copy the required files to their destination.

  • Page 29: Plug Into A Different Usb Port

    When the Handyscope HS4 DIFF is plugged into a different USB port, some Windows versions will treat the Handyscope HS4 DIFF as different hardware and will ask to install the drivers again. This is controlled by Microsoft Windows and is not caused by TiePie engineering. Hardware installation...
  • Page 30 Chapter 5...

  • Page 31: Front Panel

    Front panel Figure 6.1: Front panel Channel input connectors The CH1 – CH4 BNC connectors are the main inputs of the acqui- sition system. The isolated BNC connectors are not connected to the ground of the Handyscope HS4 DIFF. Power indicator A power indicator is situated at the top cover of the instrument.
  • Page 32 Chapter 6...

  • Page 33: Rear Panel

    Rear panel Figure 7.1: Rear panel Power The Handyscope HS4 DIFF is powered through the USB. If the USB cannot deliver enough power, it is possible to power the in- strument externally. The Handyscope HS4 DIFF has two external power inputs located at the rear of the instrument: the dedicated power input and a pin of the extension connector.

  • Page 34: Usb Power Cable

    Minimum Maximum 4.5 Volt DC 14 Volt DC Table 7.1: Maximum voltages Note that the externally applied voltage should be higher than the USB voltage to relieve the USB port. 7.1.1 USB power cable The Handyscope HS4 DIFF is delivered with a special USB exter- nal power cable.

  • Page 35: Power Adapter

    7.1.2 Power adapter In case a second USB port is not available, or the computer still can’t provide enough power for the instrument, an external power adapter can be used. When using an external power adapter, make sure that: the polarity is set correctly the voltage is set to a valid value for the instrument and higher than the USB voltage the adapter can supply enough current (preferably >1 A)
  • Page 36 Description Description Ground Ground Reserved Ground External Power in DC Reserved Ground Ground +5V out, 10 mA max. Reserved Ext. sampling clock in (TTL) Reserved Ground Reserved Ext. trigger in (TTL) Reserved Data OK out (TTL) Ground Ground C SDA Trigger out (TTL) C SCL Reserved...

  • Page 37: Specifications

    Specifications Acquisition system Number of input channels 4 analog Ch1, Ch2, Ch3, Ch4 isolated BNC Maximum sampling rate 12 bit 5 MS/s, 10 MS/s, 25 MS/s or 50 MS/s 14 bit 3.125 MS/s 16 bit 195 kS/s Sampling source internal quartz, external Accuracy 0.01% Stability...

  • Page 38: Trigger System

    Trigger system System digital, 2 levels Source CH1, CH2, CH3, CH4, digital external, AND, OR, Trigger modes rising slope, falling slope, inside window, outside window Level adjustment 0–100% of full scale Hysteresis adjustment 0–100% of full scale Resolution 0.025 % (12 bits) Pre trigger 0–128 ksamples (0–100%, one sample resolution) Post trigger...

  • Page 39: I/O Connectors

    I/O connectors Ch1–Ch2 Generator out Power 3.5 mm power socket Extension connector Sub-D 25 pins female System requirements PC I/O connection USB 2.0 High Speed (480 Mbit/s) (USB 1.1 Full Speed (12 Mbit/sec) compatible) Operating System Windows 98/ME/2000/XP/Vista-32 Operating environment Ambient temperature 0 - 55 C Relative humidity...
  • Page 40 Chapter 8...
  • Page 41 If you have any suggestions and/or remarks regarding this application or the manual, please contact: TiePie engineering TiePie engineering P.O. Box 290 Koperslagersstraaat 37 8600 AG SNEEK 8601 WL SNEEK The Netherlands The Netherlands Tel.: +31 515 415 416 Fax:...

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Handyscope hs4 diff-25mhzHandyscope hs4 diff-50mhz

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