The Ls/Lx Series is a completely improved new product based on the popular California Instruments L Series. Both the Ls and Lx feature many basic AC Source capabilities at a very reasonable price. For more information on either product, please click on the product tab on the right.

Features Details Lx Series
HP6834B Compatibility
The Lx Series offers functional and bus compatibility with the Agilent HP6834B AC power sources as well as the CI iL Series AC power sources and may be used in existing test systems without the need to modify program code. Power levels of 3000 VA and 4500 VA match the available HP6814B and HP6834B models exactly. Unlike these HP/Agilent models however, the Lx series supports a constant power mode, which provides higher output RMS current at reduced voltage for greater power output at less than full-scale voltage. (except 6000Lx, 12000Lx and 18000Lx) Furthermore, the Lx series can easily be paralleled for higher output power and multi-chassis Lx Systems up to 17.3 KVA are available allowing expansion of existing HP/Agilent based test systems.
The front panel operation has been simplified with a greatly reduced number of buttons while still allowing most functions to be accessed.

Waveform Generation
The Lx Series provides sine and clipped sine waveforms in addition to user defined arbitrary waveforms. Harmonic waveforms can be used to test for harmonics susceptibility of a unit under test. With the help of the supplied Windows Graphical User Interface program, defining harmonic waveforms is as easy as specifying the relative amplitude and phase angle for each of up to 50 harmonics. The user also has the ability to define arbitrary waveform data. Complex AC voltage anomalies can be simulated this way.
The waveform data points generated are downloaded by the GUI to the AC source through either IEEE-488 or RS232C bus and remain in non-volatile memory. Up to 32 user-defined waveforms can be stored and given a descriptive name for easy recall.
Downloaded waveforms are retained in non-volatile memory for recall over the bus or from the front panel.

Transient Generation
To simulate common line disturbance occurrences, the Lx Series offers a list of transient steps. These steps can be programmed from the front panel or downloaded over the interface using the GUI program supplied. The GUI allows libraries of commonly used line disturbances to be created on disk for quick recall. Once downloaded, the transient program can be executed from the PC or from the front panel.
AC transient generation allows the effect of rapid changes in voltage, frequency, phase angle and waveform shape on the unit under test to be analyzed. The combination of transients and user defined arbitrary waveforms creates a powerful test platform for AC powered products.

Measurements
The Lx Series measurement system is based on real-time digitization of the voltage and current waveforms using a 4K-sample buffer. The digitized waveform data is processed by a Digital Signal Processor to extract conventional load values such as rms voltage, rms current, real and apparent power. The same data is also used to perform Fast Fourier Transformation (FFT) to extract the harmonic amplitude and phase angle of 50 harmonics.

Standard Measurements
The following standard measurements are available from the front panel or via the bus:
 

• Frequency
• Phase
• Voltage (rms)
• Current(rms)
• Peak Current
• Crest Factor
• Neutral Current (rms)
• Real Power
• Apparent Power
• Power Factor

Advanced Measurement Functions
In addition to standard load parameters, the Lx Series is capable of measuring voltage and current amplitude and phase harmonics. Total harmonic distortion of both voltage and current is also available.
Advanced measurement results like harmonic content of voltage and current for all three phases are available over the bus. The GUI can be used to save and print harmonics data in tabular, bar graph or time domain formats.
The acquired voltage and current time-domain waveforms for each output phase can also be displayed using the GUI program. Waveform displays on the PC include voltage and current combined, three-phase voltage, three-phase current and true power. The time-domain data is also available for transfer to a PC through the IEEE-488 or RS232C bus when using custom software.

Diagnostic Capability
The AC Source can perform a self test and report any errors. The self test will run until the first error is encountered and terminate. The response to the self test query command will either be the first error encountered or 0 if no error was found. (Self test passed).

Windows Graphical User Interface
A Windows 2000/XP™ compatible Graphical User Interface (GUI) offers a soft front panel interface for operation from a PC. The following functions are available through this GUI program:
 

• Steady state output control (all parameters).
• Create, run, save and print transient programs.
• Generate and save harmonic waveforms.
• Generate and save arbitrary waveforms.
• Measure and log standard measurements.
• Capture and display Voltage and Current waveforms.
• Measure, display, print and log harmonic voltage and current measurements.