IEC 60966-1-2019 pdf free.Radio frequency and coaxial cable assemblies — Part 1: Generic specification- General requirements and test methods.
8.8 Phase variation with temperature
8.8.1Object
To determine the changes of phase caused by the change in the electrical length when thecable assembly is subjected to various temperatures within its operating temperature range.
When specified in the relevant detail specification, this test may be conducted on a specimencable assembly rather than a finished cable assembly.The specimen cable assembly shall beidentical to the finished cable assembly except for its length and its shape.
8.8.2 Procedure Measurements shall be made using a suitable network analyser according to 8.1.2 with thecable assembly, including its connectors, in a controlled temperature chamber. Details of anycable supports shall be given in the relevant detail specification.
Where tests are made on a specimen cable assembly，the cable shall form one or moreunsupported loops of a diameter at least ten or more times the minimum static bending radius.
Six temperature cycles shall be used. Alternatively，a slotted line can be used wherefrequency and accuracy requirements permit.
8.8.3 Requirements During the test, the phase variation shall not exceed the limits specified in the relevant detailspecification.
8.8.4 Information to be given in the detail specification
a) temperature range and temperature against time cycle;
b) measurement frequency;
c) method of presenting the results, for example ap/°C;
d) admissible phase variation;
e) configuration of substitute specimen cable assembly, when allowed.8.9Screening effectiveness
8.9.1 Transfer impedance
The transfer impedance shall be tested.
Applicable tests for transfer impedance are given in lEC 62153-4-6 or lEC 62153-4-7.
The relevant detail specification shall identify the applicable test, the frequency range and theminimum value of transfer impedance.
8.9.2 Screening attenuation
The screening attenuation shall be tested according to 62153-4-7.
The relevant detail specification shall identify the frequency range and the minimum value ofscreening attenuation.
8.13.1Object
The power rating of a cable assembly is defined as the input power at any specifiedfrequency,temperature and pressure，which can be handled continuously when the cableassembly is terminated by a load corresponding to the characteristic impedance.
A limitation may be either the maximum permissible operating voltage or the maximum innerconductor temperature of either the cable or the connector.
Thus, the power handling capability test is divided into two categories:
a) continuous power handling capability;
b) peak or pulsed power handling capability.
8.13.2 Procedure
The test shall be performed in accordance with lEC 61196-1-119 taking into account anyevidence of arcing and mechanical displacement of the solder or mechanical joint.
8.13.3 Requirements
There shall be no evidence of breakdown due to overheating,arcing or flashover throughoutthe application of the specified power related to the environmental conditions as stated in therelevant detail specification.After the test, the cable assembly shall show no visual damageand the electrical requirements shall be satisfied.
The temperature rating of the material components should not be exceeded.IEC 60966-1 pdf download.