• Reference Source for OATS Verification
• Usable Frequency Range to 18 GHz
• Amplitude Variation Less Than ± 2 dB
• Auto RF Shutoff With Low Battery Voltage
• Omni-directional

Com-Power CGO-5100A Application

Radiated emissions measurements for EMC are usually conducted on an Open Area Test site (OATS) or an anechoic chamber. OATS and chambers must be calibrated before use in accordance with published calibration procedures at regular intervals. These calibration methods are too elaborate and time consuming to be performed before each test to ensure that the data taken is consistent and accurate. However, the generally specified one-year calibration cycle is too long to find out about any problem with the site or associated test equipment.

The Comb Generator is a tool to solve these problems. The test engineer should keep a daily log of a few Comb Generator radiated readings before starting his test. He is able detect potential problems with site by monitoring any change in the readings. For example, any problem or change with antenna, cables, preamplifier, attenuator or receiver will be reflected in the Comb Generator data with the same setup. The same method can be utilized when EMC emissions measurements for a product varies with sites. The Comb Generator can be used to determine if the test sites are causing the variation. Without such a reference source, it would be extremely difficult to compare several sites.

The comb Generator can also be used to check the shielding effectiveness of an enclosure.