CS Limit Upper Bound

Most conducted susceptibility limits are specified as a voltage or current, as discussed in the previous paragraphs.  Additionally, most CS limits also have a caveat that bounds the maximum current (in the case of a CS voltage limit), voltage (in the case of a CS current limit), or power to which the device under investigation must be subjected. 

These bounds are in place to restrict the injected signal when the device under investigation has very low or very high input impedance.  For example, MIL-STD-461E, which specifies the CS limit (CS114 shown in the previous section) in terms of voltage, has an upper bound caveat that reads, "Requirements are also met if the EUT is not susceptible at forward power levels sensed by the coupler that are below those determined during calibration provided that the actual current induced in the cable under test is 6 dB or greater than the calibration limit."  What this means is that there is a limit to how much power should be injected on the conductors when trying to develop the voltage specified by the CS114 limit.  Other CS requirements have similar caveats.

CS Analyst has the capability to put an upper bound on the signal injected during a CS analysis.

To specify an upper bound for the CS Limit, click the Bound button on the CS Limit form.  The Bound form opens and allows the CS Bound to be specified in one of three ways, as shown in the Figure below.

More:

CS Bound -- Real-Time Level

CS Bound -- Pre-Test Calibration Level

CS Bound -- No Bound