Check List - Emissions Test
For Class B tests, all local support equipment must be rated class B. This can be determined from the equipment labeling which should show either an FCC ID number or a DoC Label with the FCC logo and the statement "tested to comply..." For Class A certifications, local support equipment may be either Class B or Class A.
The complete system (EUT and local support equipment) must meet the emissions requirements. If this is your first test, we recommend pre-screening the support equipment to ensure it meets the relevant limits prior to performing a final test.
If your EUT is a PC peripheral, your test configuration must include a PC with a keyboard, a display, and at least two local peripherals (not including a mouse or a joystick), and be connected to two different types of interface protocols. The keyboard and display may form part of the PC (e.g. laptop computer). The PC should run a program that exercises the peripherals and sends a scrolling "H" pattern (full screen) to the display. A second peripheral, such as a USB or RS232 device, must also be provided.
If your EUT uses or generates signals in excess of 108 MHz, even if the signal is contained within an IC, emissions tests must be performed above 1 GHz for FCC Part 15 tests. If so, please inform your Project Manager beforehand so sufficient time can be reserved and the appropriate test equipment made available.
During emissions testing, if you intend to remotely locate your support equipment from the EUT, you should bring at least 30 m (100') cables to ensure the remote support equipment will have minimal effect on the measurements.
