MIL-PRF-15733J
FIGURE 2. AC filters; measurements of voltage drop.
4.6.8.2 For filters rated dc only (see 3.1). The voltage drop shall be determined in accordance with figure 3.
Measurements shall be made by using a dc reading meter when the filter is carrying rated current and rated voltage.
At the manufacturer's option, the dc resistance can be measured in accordance with method 303 of MIL-STD-202.
The equivalent dc voltage drop can then be calculated.
FIGURE 3. DC filters; measurements of series-element voltage drop at rated current.
4.6.8.3 For filters rated ac and dc (see 3.1). The voltage drop shall be measured as specified in 4.6.8.1 and
4.6.8.2, respectively. Both measurements must be taken for filters rated ac and dc.
4.6.9 Insertion loss (see 3.12).
4.6.9.1 Insertion loss (at +25°C). Filters shall be tested in accordance with MIL-STD-220 or to an approved
equivalent at load and no-load as specified (see 3.1). With only the 10 dB pads, adapters, and fixture in the circuit,
0 dB reference shall have no more than ±1 dB error and the measurements shall be accurate to within ±3 dB over the
specified frequency to 1 GHz.
4.6.9.2 Insertion loss (at temperature). This test may be conducted in conjunction with the capacitance
measurement (temperature and voltage) provided the insertion loss is read before the dc bias is applied at each
temperature. Filters shall be tested as follows:
a. The filters shall be located with an appropriate adaptor in a temperature chamber.
b. Load and no-load measurements shall be made at -55°C, +25°C, and +125°C. Measurements shall be
made at a sufficient number of frequencies to plot a curve of insertion loss versus frequency over the
specified frequency range for each temperature. Alternatively, photographs of the display of a spectrum
analyzer or chart recordings may be used.
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