Use of pseudo-random PCM tape signatures for telemetry ground station validation

The present work describes an improved tape recorder signature using pseudo-random PCM data. The use of the signature for telemetry ground station validation is discussed. Advantages over other techniques in common use are shown. Station certification, recorder alignment, and field tests are considered. It is concluded that the bit error rate leader provides a means of rapidly certifying telemetry equipment, and that the leader can also be used to align recorder head azimuth simply and accurately.