Daill Connect the PCB ground to case chassis at vehicle connector edge only, not all four corners. P is used, these recommendations may not be necessary. Actual hardware samples or physical mock-up for visual is desirable but not required. All electrical outputs that are to be monitored during the various tests, detailing the signals and each of their respective reference and how they are to be monitored e. Identify the ESD discharge points. The list of lessons learned captured is not all-inclusive nor binding, and may not reflect the latest technology.
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Daill Connect the PCB ground to case chassis at vehicle connector edge only, not all four corners. P is used, these recommendations may not be necessary. Actual hardware samples or physical mock-up for visual is desirable but not required. All electrical outputs that are to be monitored during the various tests, detailing the signals and each of their respective reference and how they are to be monitored e. Identify the ESD discharge points.
The list of lessons learned captured is not all-inclusive nor binding, and may not reflect the latest technology. Connections between transient generators, monitoring equipment, and the DUT. Direct monitoring using attachments leads to external monitoring devices shall not be included. All non-electrical outputs to be monitored, including lamps, gauges, etc. A detailed schematic of all power and ground connections used within the simulator.
If not specified in other specifications, use the following tolerance for voltage and current: Photographs with sufficient clarity to enable with the test plan to be verified. More inductors and capacitors may be needed, and at different values. All connections to power and ground planes have to be very short runs — Pin To Plane with low inductance paths unless the tester is current starving the IC, refer to B2. Provide output voltage and current time domain measurements for power outputs and inputs.
This section assumes that production software is not mandatory; the use of specialized software is acceptable. All electrical and non-electrical inputs excluding the DUT connector sidentifying what they are and whether they are to be provided by the supplier as part of the simulator package or whether it is expected that the EMC test lab provide them.
It describes all relevant test setups and procedures to verify the electromagnetic robustness of the design. This is taken directly from GMW for those items relevant the lab.
Usually used within the circuit board. If it is found necessary to current starve a tri-state buffer, for example see Figure B1, also Figure B6it is recommended that each of the inputs referenced to VCC also have provisions for the same current starving device. The capacitance value should be calculated from: Road vehicles engineering Providing separate power feed structure to main? Part number and description of the harness. Combination of digital and analog that requires bus messaging to a defined load.
GMW This reduces the stray capacitance between the power and ground structure and enhances the performance of the current starving device resistor, inductor, or ferrite bead.
Propose solutions to problems and appropriate revalidation. P by adding series device refer to B2. Waveform should be as sinusoidal as possible. In some cases, it may make sense to select a specific sample for test that represents the entire DUT family. Keep ground planes uncut. Pulse 1 is applicable even to battery lines due to assembly plant sequencing — no damage allowed. Brief family description of DUT s. Low pass filters with series diodes should be avoided to minimize radiated immunity issues caused by RF rectification; this does not include transient suppression on battery or ignition inputs.
Any data obtained from testing where there are deviations to the approved test plan and applicable standards that are gmww approved by the GM EMC Engineer shall not be published in a validation DV or PV report. Provisions for overvoltage, load dump event and reverse voltage protection should be located on battery 12 V input. Any deviation from the approved test plan and any applicable standards, including, but not limited to, setup and test procedure.
Any deviation from the requirements of this engineering standard, including, but not limited to, test setup and test procedure. Populate around vias at the pad bmw is to be referenced to ground, no long paths or traces. General Theory of Operation inclusive of how it is used in the vehicle. Do not break solid ground plane with high speed, place them on power plane if necessary. Software diagnostic timers should be reset to minimum detection values, to facilitate assertion of potential diagnostic flags during the RF exposure time maximum 2 seconds.
The hardware engineer should consult with the software team in selecting the best possible value for the pulse cycle time.
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Maurr Modifications, alterations, internal part swaps, hardware and software changes are not considered carryover and must be validated according to the requirements. Traces are required to be symmetrical to each other or balanced with little trace length. Turn off via software any and all? Use SMD components with very short traces to the? GMW Nothing in this standard supercedes applicable laws and regulations. Alert me in case of modifications on this product contact us.