������������ Defines the requirements for an equipment to measure bit-error performance at 64 kbit/s and N�� 64 kbit/s.
����� digital error detector;
����� digital pattern generator;
����� error performance measurement;
����� measurement;
� ��� tester.
PREAMBLE
������������ The requirements for the characteristics of a bit-error performance measuring equipment which are described below must be adhered to in order to ensure compatibility between equipment produced by different manufacturers.