COM-power corporation CLCI-400, Instruction Manual

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INSTRUCTION MANUAL
SEC TI ON 5
- CALIB RATION & TE ST PROCED URE S - MI L-STD-461G (CS114)
Rev081219
The information contained within this section is offered as guidance only. The relevant
standards and/or test plans should be consulted to ensure proper application of the tests
to be performed. The information provided is based on MIL-STD-461G, and may or may
not be appropriate for tests performed according to this or other editions of the standard.
The frequency range of the CS114 test is typically 10 kHz to 200 MHz. This section
addresses the determination of the intermediate test frequencies in this range. For
the purposes of this document, it is assumed that a ‘stepped’ frequency scan will
be performed. If you are to perform a ‘swept’ analog scan, refer to the
appropriate standard for guidance.
In a stepped scan, the intermediate test frequencies are logarithmically spaced,
and determined through calculation according to Table III of MIL-STD-461G, which
is summarized in Table 3 below:
Frequency Range Maximum Step Size
30 Hz – 1 MHz 0.05 f
o
1 MHz – 30 MHz 0.01 f
o
30 MHz – 1 GHz 0.005 f
o
In Table 3, f
o
represents the current test
frequency. So, if the first test frequency
is 10 kHz, the step size to the next test
frequency is equal to 0.05 * 10 kHz, or 500
Hz. Therefore, the second test
frequency is 10.5 kHz. The step size to the
third test frequency will then be equal to
0.05 * 10.5 kHz, or 525 Hz; so, the third test
frequency is 11.025 kHz; and so forth.
Given in Table 4 is a truncated example
of the test frequencies for the respective
frequency ranges.
There should be a total of 815 test
frequencies for the frequency range of
10 kHz to 200 MHz.