MIL-DTL-87104C
3.5.1 Electrical properties.
3.5.1.1 Frequency range. The frequency range of the coaxial assembly shall be as specified in the detail
specification.
3.5.1.2 Voltage standing wave ratio (VSWR) (see 4.6.2.1). The VSWR at the input to the coaxial assembly shall
not exceed the value specified in the detail specification. The assembly shall be tested in accordance with 4.6.2.1.
Accept-reject criteria for test procedure I, II, and III shall be in accordance with 4.6.2.1.1.5, 4.6.2.1.2.5 and
3.5.1.3 Impedance (see 4.6.2.2). Unless otherwise specified in the applicable detail specification, the
characteristic impedance of the coaxial assembly shall be 50 ± 1 ohm. Assembly shall be tested as specified in
3.5.1.4 RF Insertion loss (see 4.6.2.3). The RF insertion loss of the coaxial assembly shall not exceed the value
specified in the detail specification. The assembly shall be tested in accordance with 4.6.2.3 and shall satisfy accept-
reject criteria of 4.6.2.3.2.1, 4.6.2.3.3.1, 4.6.2.3.4.1 or 4.6.2.3.5.1 for procedures I, II, III or IV, respectively.
3.5.1.5 Corona (see 4.6.2.4 and 3.5.1.6). The corona extinction point of the coaxial assembly shall not be less
than the value specified in the detail specification.
3.5.1.6 High potential (see 4.6.2.4). There shall be no evidence of voltage breakdown between the center
conductor and the outer conductor of the coaxial assembly when subjected to the voltage level specified in the detail
specification. The assembly shall be tested as specified in 4.6.2.4 and shall satisfy accept-reject criteria of 4.6.2.4.3.
3.5.1.7 Altitude compliance (see 4.6.2.5). The coaxial assembly shall meet the corona and high potential
requirements test voltages at the altitude specified in the detail specification. The assembly shall be tested as
3.5.1.8 Power handling capability (PHC) (see 4.6.2.6). The coaxial assembly shall be capable of handling the
power level specified in the detail specification. The assembly shall be tested as specified in 4.6.2.6 and shall satisfy
accept-reject criteria of 4.6.2.6.3.
3.5.1.9 RF leakage (see 4.6.2.7). The coaxial assembly shall be so designed to suppress RF radiation of the
fundamental and harmonics. The RF suppression capability shall be as specified in the detail specification. The
assembly shall be tested as specified in 4.6.2.7 and shall satisfy accept-reject criteria of 4.6.2.7.3.
3.5.1.10 Velocity of propagation (VP) (see 4.6.2.8). When the coaxial assembly is tested as specified in section 4,
the velocity of propagation values shall not be less than those specified in the detail specification. The assembly
3.5.1.10.1 Electrical length. The electrical length shall be calculated as specified in 4.6.2.8.2 herein.
3.5.1.10.2 Time delay. The time delay shall be calculated as specified in 4.6.2.8.2 herein.
3.5.1.11 Thermal stability (see 4.6.2.9). When tested as specified in 4.6.2.9., the coaxial assembly shall meet the
following:
a.
Unless otherwise specified in the detail specification, for cable assemblies the axial length variation
between the inner conductor and the following component parts of the cable (test sample 1C, see
4.4.2.1.4) shall be measured and recorded in the test report:
(1) Between the inner conductor and the dielectric core.
(2) Between the inner conductor and the outer conductor(s).
(3) Between the inner conductor and the moisture seal.
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