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Test Definitions

  

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C/CS Mounts
  Two different but standard video camera mount configurations. The more prevalent of the two types is the standard C-mount, which provides a 17.52mm flange focal distance (FFD). The CS-mount typically provides a 12.5mm FFD. C-mount lenses can be used in CS-mount configurations with a 5mm adapter.
Source: JML Optical
 
C++
  An object-oriented programming language. Bjarne Stroustrop created C++ at Bell Labs in the 1980s as the successor to C, the most popular language for writing software for PCS.
Source: HostPulse
 
Cable
  A group of individually insulated wires inside a common sheath.
Source: CableTest
 
  Group of two or more insulated wires.
Source: Twisted Pair
 
Cable Modem
  A MODEM enabling the connection of a PC to a local cable television line. Cable modems provide fast, always-on connections to the Internet in areas where the necessary coaxial cable has been laid.
Source: HostPulse
 
Cable Tester
  A test equipment (typically computer driven) used to quickly check the pin configuration or troubleshoot common data cables.
Source: A.T.E. Solutions, Inc.
 
Cache
  Pronounced cash, a special high-speed storage/memory mechanism. It can be either a reserved section of main memory or an independent high-speed storage device. Two types of caching are commonly used in personal computers: memory caching and disk caching.
Source: Xilinx
 
CAD Framework Initiative
  (CFI) - A consortium of EDA tool companies tasked with the development of framework standards for EDA tools.
Source: EE Design
 
Calculate ATE Cost and Performance
  You can calculate the Cost of Ownership of a test cell over its lifecycle as the sum of capital expenditures plus operating expenditures plus yield loss divided by throughput. To calculate throughput: Multiply the good units you test per hour times the utilization times the uptime of the equipment. Capital expenses can then be calculated by adding the base price of the equipment plus any upgrades and peripherals and dividing by the economic life of the equipment. When you calculate operating expenses, in addition to the operators of the machine, make sure to also consider the time demands of the engineers and technicians who support your testing programs.
Source: Advantest
 
Calibration
  Comparison of measurement standard or instrument of known accuracy with another standard, instrument or device to detect, correlate, report or eliminate by adjustment, any variation in the accuracy of the item being compared. Use of calibrated items provide the basis for value traceability of product technical specifications to national standard values. Calibration is an activity related to measurement and test equipment performed in accordance with ANSI/NCSL Z540-1 or equivalent.
Source: MIL-Std-883F at Defense Supply Center Columbus
 
  Set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring instrument or measuring system, or values represented by a material measure or a reference material, and the corresponding values realized by standards.
Source: APEC Secretariate
 
  (as applied to vibration sensors) An orderly procedure for determining sensitivity as a function of frequency, temperature, altitude, etc.
Source: Vibration and Shock
 
  To adjust the correct value of a reading by comparison to a standard.
Source: Twisted Pair
 
Calibration Equipment
  Instruments that use electrical signals or physical quantities to ensure agreement between meters and an international standard.
Source: A.T.E. Solutions, Inc.
 
Calibration Service
  A service through which a range of calibration and repair services are performed for electronic test and measurement equipment, sometimes at your facility.
Source: A.T.E. Solutions, Inc.
 
Calibration Standards
  Properly calibrated items, usually taceable to NIST ([USA] National Institute of Standards and Technology)standards, used to ensure that an equipment makes proper measurements or applies accurate stimuli.
Source: A.T.E. Solutions, Inc.
 
CanBus
  A differential 2-wire interface running over either a Shielded Twisted Pair (STP), Un-shielded Twisted Pair (UTP), or Ribbon cable. A number of different Protocols are used with CAN bus. The CanBus (or Can Bus) is primarly used as an Automotive Bus, but is also one of the major Field Buses.
Source: Interface Bus
 
Cannibalize
  To remove, without subsequent replacement, useful serviceable items from one equipment/system for use on other equipment/systems.
Source: UK Defence Standard 00-49
 
Cannot Duplicate
  (CND) - A fault indicated by BIT or other monitoring circuitry which cannot be confirmed at the first level of maintenance.
Source: MIL-STD-2165
 
  (CND) - An operationally observed/recorded system malfunction (for example, by BIT or on-line monitoring means) which maintenance personnel were unable to duplicate. [The CND occurs at the same level of maintenance where the malfunction was originally observed unlike with Retest OK where the test is at a higher maintenance level. Depot higher than I-Level, which is higher than O-level.]
Source: MIL-STD-1309D Definition of Terms for Testing, Measurement and Diagnostics
 
  (CND) - The inability to replicate field failures during lower level maintenance assessment. From collected field analyses, CND failures can make up more than 85% of all observed field failures in avionics and account for more than 90% of all maintenance costs. These statistics can be attributed to a limited understanding of root cause failure characteristics of complex systems, inappropriate means of diagnosing the condition of the system, and the inability to duplicate the field conditions in the lower level test environment.
Source: Prognostics and Health Management
 
Canonical Form
  In a mathematical context this term is taken to mean a generic or basic representation. Canonical forms provide the means to compare two expressions without falling into the trap of trying to compare "apples" with "oranges".
Source: Maxfield & Montrose Interactive Inc.
 
Capabilities Tests
  Also called design verification tests. They are intended to ensure that all capabilities have been properly designed into the item. If the design is identical for all units with the same capabilities, only one (fault free) unit under test needs to undergo capabilities test.
Source: A.T.E. Solutions, Inc.
 
Capacitance
  A measure of the ability of two adjacent conductors separated by an insulator to hold a charge when a voltage differential is applied between them. Capacitance is measured in units of Farads.
Source: Maxfield & Montrose Interactive Inc.
 
  The amount of electric charge that can be stored for a given electrical potential. The most common capacitor type is the two-plated capacitor, where the formula for capacitance is given by C= Q/V.
Source: The Paramatric Measurement Handbook
 
Capacitance Measurement Unit
  (CMU) - This is a very generic term covering any sort of hardware that can perform capacitance measurement.
Source: The Paramatric Measurement Handbook
 
Capacitive Reactance
  The opposition to current flow provided by a capacitor. Capacitive reactance is measured in ohms and varies inversly with frequency.
Source: Twisted Pair
 

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