Teseq INA Custom Discharge Networks

MIL-STD-464 details the US military’s requirements for electromagnetic environmental effects on the interfaces of sea, space, ground and airborne systems. To safeguard the operation and performance of these systems, each should be compatible with equipment within the system and related subsystems. MIL-STD-464 primarily consists of design requirements and verification methods necessary to prevent or resolve these electromagnetic compatibility issues. Throughout the standard, Data Item Descriptions (DID) are referenced to determine problem areas early on in system design, minimize risks going forward and document testing results. The current version of MIL-STD-464 is MIL-STD-464C. The following are brief summaries of the standard's requirements: 5.1 Margins Margins should be offered based on system performance requirements, tolerances and uncertainties.   5.2 Intra-system electromagnetic compatibility (EMC) The system should be electromagnetically compatible with its own components.   5.3 External RF EME The system should be electromagnetically compatible with a specified external electromagnetic environment to the extent that operational performance standards are met.   5.4 High-power microwave (HPM) sources The system should meet its own requirements after exposure to narrowband and wideband HPM environments.   5.5 Lightning The system should possess the appropriate resistance to both direct and indirect lightning effects.   5.6 Electromagnetic pulse (EMP) The system should meet performance standards after exposure to the EMP environment.   5.7 Subsystems and equipment electromagnetic interference (EMI) Individual components, equipment and subsystems must meet radiated immunity, radiated emissions, conducted immunity and conducted emissions test requirements.   5.8 Electrostatic charge control The system should be able to both control and disperse electrostatic discharge (ESD) triggered

ISO 10605 covers testing procedures involving electrostatic discharge within road vehicles. ISO 10605  ISO 10605 is accredited by the Technical Committee ISO/TC 22 and Subcommittee SC 3. This test methods needed for electrical disturbances, which is caused by electrostatic discharge, are specified with ISO 10605 requirements. For example, charge build-ups made from movement inside a vehicle or during exiting can result in electrostatic discharge. ESD Tests  Tests that simulate an electrostatic discharge (ESD) into a vehicle electrical system are based on the human ESD model. Sensitive electrical devices can be adversely affected by energy either coupled or radiated from electrostatic discharges. This International Standard describes ESD tests that apply to both automotive electronic modules and vehicles.    ESD Waveforms for ISO 10605  There a four different discharge networks used to accomplish each waveform as required by ISO 10605. The different Resistance and Capacitance values affect the discharge output timing typically measured at 30 and 60ns. When changing networks, the decay time of the waveform changes and results are measured as listed in the table above.   Waveform 1 is the ESD discharge using a 330 pF/330 Ω network Waveform 2 is the ESD discharge using a 150 pF/330 Ω network Waveform 1 here is using a 330 pF/2000 Ω discharge network Waveform 2 here is using a 150 pF/2000Ω discharge network Starting Profile Waveform of ISO 10605-2 The starting profile waveform is created from from a Load Dump Simulator and a DC Source to simulate an automotive system during start up. This is traditionally seen in Internal Combustion Engine (ICE's) vehicles where cranking occurs upon startup. ISO 10605 Test Equipment  ATEC carries several products for ISO 10605 from industry-leading companies, including Haefely and Teseq. Please,