The Model 7200 is a microprocessor-based capadtancc meter which provides fully automatic, 1 MHz capacitance and loss measurements. Its operating capacitance range is 0 to 2000 pF, and its conductance range is 0 to 2000 pS. The following features make the Model 7200 suitable for a wide variety of applications. a. Versatile Displays. The Model 7200 measures the parallel capacitance and conductance of the device under test From these measured parameters» it can calculate and display the equivalent series and parallel resistance, series capacitance, dissipation factor, and quality factor. Capacitance can also be displayed as a deviation from a programmable reference value in % or pF units. b. Accuracy. The base accuracy of Model 7200 for capacitance measurements is 025 % of reading -t- 02 % of full scale + 0.005 pF, and the basic accuracy for conductance measurements is US % of reading +- 2j0 % of full scale + 0.05 fiS + 2(coC)2, where C is the parallel capacitance in Farads. c. Programmable Bias and Test Level. The Model 7200 utilizes a 1 MHz test signal with programmable levels of15,30,50, or 100 millivolts. It accepts, measures, and displays external DC bias voltages over a range of ± 200 volts. An internal bias power supply is programmable over a ± 100 volt range. Bias voltages of either polarity can be applied to the HI test terminals. This bias capability with fast responding C, G, and V outputs makes the instrument ideal far C-V or G-V semiconductor plots, as well as DLTS material studies. d. Wide Zeroing Range. The Model 7200 can zero stray capacitances of up to2000pF automatically with a single keystroke. As a result of this wide zeroing capability, the range of the instrument can be effectively increased to 4000 pF by first zeroing the instrument with a 2000 pF specimen connected to the input terminals. e. Ease of Operation. Human engineering con- sidérations have been emphasized in both the mechanical and electrical design of Model 7200. Measurement modes, test signal levels, bias voltages, and reference capacitance and conductance values are easily programmable with front- panel keystrokes. Ranging and measurement are fully automatic. Measured values and settings are displayed on a 20-character vacuum-fluorescent display with of measurement to minimize the possibility of misinterpretation. LEDs indicate active keys. f. Panel Setup Storage and Recall. The Model 7200 can store up to 99 complete panel setups in nonvolatile memory. Each stored setup can be recalled by entering the stored program number either locally or through the GPEB bus. This feature is especially useful when a series of often- repeated test sequences needs to be performed. g. IEEE-488 interface. The Model 7200 uses a microprocessor with a fixed internal program for automatic control of all measurement, computation, and display functions. The use of a microprocessor facilitates interfacing with ATE systems. The Model 7200 is equipped with a full-function IEEE-488 bus interface. All front panel control functions, with the exception of the PLOT and LCL/INIT key functions, are remotely programmable. For rapid data transfer, C, G, and V information is available simultaneously. h. Analog Outputs. Analog voltages proportional to measured values of capacitance, conductance, and bias are continuously available at rear panel connectors for application to an analog plotter. i. Remote Measurements. Because of its tolerance of loading capacitances, the Model7200 is particularly useful for measurements at a point remote from the front panel test terminals, such as in environmental chambers, in areas of harmful radiation, or in component handlers for production testing. j. Special Functions. A variety of special functions are provided to extend the operational capabilities of Model 7200 to meet specific requirements. The instrument can be configured to hold a particular measurement range when parameters of test specimens fall within a known range. Measurement limits can be programmed, and the instrument will indicate if the measurements for the test specimen are above or below these limits.