Other Posts

  • RF Attenuator – Protect DUT and Measuring Device

    RF Attenuator reduce RF power. One purpose is to protect both the DUT and Measuring Device from exceeding input power max. Exceeding input power can damage expensive DUT and Measuring Device (ex Spectrum Analyzer). RF Attenuator come as Fixed,Manual (steps), Programmable,Variable. Selection of RF attenuator Frequency Range Low VSWR Correct Power Rating Low Insertion loss… Read more

  • Spectrum Analyzer — RBW and VBW settings

    The effects of changing Resolution Bandwidth (RBW) and Video Bandwidth (VBW) setting on a spectrum analyzer. Small frequencies for RBW setting will lower noise floor. Small frequencies for VBW setting will lower noise amplitude. Small frequencies for RBW and VBW will increase test time (sweep). Setting may be predetermine by specification or standard for a… Read more

  • Optical Transceiver Testing

    These are some of the instruments required for testing an Optical Transceiver. Instruments DCA (for eye diagram, mask Test, Jitter) Bert[Bit Error Rate tester] for testing Data Bit Error Rates vs time and Random Data Pattern Source, Clock Source. Optical Source Optical Power Meter Optical Attenuator RF Attenuator Optical Switches/Switching Fiber Connector Adapters Optical Splitter… Read more

  • Hardware IO list important step for Software Programmer

    Before a software can implement assignment for AD ,DA , DIO, DMM, Function Generator, etc. you need to know the Hardware IO List. assignment The Hardware Engineer(which may also be the Software Engineer) most likely will have created this list to keep track of what pin or IO type are available. If the person in charge… Read more

  • Load Resistor and Current Sensing Resistor wiring.

    Load Resistor wiring must be must be in a correct order to maintain the best accuracy for monitoring the voltage across the Load Resistor. Sensing wires which are used to monitor the voltage across the resistor should be as close to the resistive element as possible. This illustrations below show the proper location of the… Read more

  • Test Report – Typical Format

    Below is a typical format used in test report. This can be txt or html. LabVIEW has report gen tools. Some Test reports can also in images (ex Scope captures images) If you are using TestStand to create  the Test Report you will most likely need to modify the Reportgen.seq and UUTInfo data type. Although… Read more