Comb Generators is a broadband EMC signal source for quick EMC site testing. It radiates signals up to 40 GHz at 1 GHz frequency steps. EMC labs calibrate their radiated emissions test sites, instrumentation and accessories at least once a year. The calibration procedures are elaborate and time consuming. However, calibration does not prevent equipment malfunction in between calibration period such as damaged receivers, broken cables, poor connections, bad antenna, etc. For example, as the frequency increases poorly mated connector can cause significant measurement errors. Monitoring a few frequencies regularly on the Comb Generator's broadband radiated output can verify the entire setup quickly and efficiently. Any potential problems with the test setup can be detected before it causes erroneous results. It is powered by a rechargeable NimH battery pack. It has circular shape for more uniform radiated output.
The CGC series Comb Generator was specifically designed to test installed Line Impedance Stabilization Networks (LISNs). LISNs are used for EMC conducted emissions testing according to FCC Part 15, CISPR, and EN requirements. The Comb Generator output is connected to the LISN EUT power port and measurements are taken similar to an EUT. For convenience, the CGC series Comb Generators have 3 prong standard US plug for LISNs with matching EUT power socket. By using the Comb Generator the test engineer can quickly identify any problems with the conducted setup before making any measurements with an EUT. the Application Note AN-104 provides more details on the Comb Generator. CGC51000
Comb Generators for Testing Radiated Emissions Sites
Comb Generators for Testing Setups with Line Impedance Stabilization Networks (LISNs)
|CGC-255||50 & 250 kHz||50 kHz - 30 MHz|
|CGC-510||100 & 500 kHz||100 kHz - 30 MHz|