AS CA S043.2:2016 pdf free

AS CA S043.2:2016 pdf free.Requirements for Customer Equipment for connection to a metallic local loop interface of a Telecommunications Network – Part 2: Broadband
The termination impedance for tests should be as specified for the Equipment Class. The accuracy of the terminating impedance should be taken into account when assessing the measurement uncertainty.
Where CE sources or sinks DC power feed or wetting current, the test conditions should be that which are normally present in use.The test circuits should provide the required current sources and sinks. The AC impedance of the source/sink should be taken into account in the estimation of measurement uncertainty. The balance of the source/sink should also be sufficient to allow the measurement of longitudinal balance.
The PSD should be measured using the configuration in Figure 1.The data input to the CE under test should be a pseudo-random sequence, and the CE should provide all processes used in normal operation (e.g. scrambling and coding). Pseudo-random sequences should be those specified in the 0.151 [12], 0.152 [13] or 0.153 [14] for the appropriate data rate.
Where resolution bandwidths and frequency ranges are specified for the Equipment Class, the specified resolution bandwidth and frequency ranges should be used in measuring the PSD. Where resolution bandwidth and frequency ranges are not specified a resolution bandwidth less than or equal to 100 Hz shall be used in measuring the PSD.
Measurements should be made at discrete frequencies, with a spacing equal to the resolution bandwidth, covering the range specifed for the Equipment Class.
The measurement at each frequency should be averaged over a time which takes into account the settling time for the resolution bandwidth. For a measurement bandwidth of 10 kHz at least 2 seconds is required.
To obtain the dynamic range required in the measurement of some Equipment Classes, it may be necessary to use passive filters before the spectrum analyser or selective level meter when measuring the out of band spectrum. If filters are used it is necessary to assure the nominal termination impedance is maintained across the whole signal band.AS CA S043.2 pdf free download.