Try not to drive your device too close to this level. But if you must use a low power filter at the output to reduce any added harmonic distortion. If you are using an attenuator issues such as flatness and accuracy come into play. The best approach is to characterize the attenuator using a network analyzer and correct the source power to compensate for any attenuator error. Be aware that at very low amplitude levels, interfering signals can have a major impact on signal accuracy.
Sources can range from external radiation to leakage within the instrument itself.
Leakage from the source impacts the level input to the DUT while external noise influences measurement data. One option is to place the DUT in a shielded environment such as a metal box or shielded room. Cahners Business Information , a division of Reed Elsevier . All rights reserved.