scope:

This specification covers the performance requirements for a disciplined time-frequency (DTF) standard with Time Base and Frequency Control. The standard provides standard time and frequency signals of a high order of frequency accuracy and is capable of being phase locked to an external frequency signal and synchronized to an external time signal, as well as providing frequency memory capability to retain the frequency accuracy of the standard and remain at its last frequency after a loss of input signal.

Standards covered by this specification shall be of the following classes as specified. Frequency control refers to the capability to be phase locked to some standard input frequency. Time base refers to a synchronizable 1 pulse per second (PPS) generator.

Standard shall operate continuously over MIL-E-16400 class 4 temperature range of 0°C to +50°C at ground level and up to 10,000 feet altitude (20.6 in Hg).

Special shall operate continuously over MIL-E-16400 class 2 temperature range of −28°C to +65°C at ground level and up to 10,000 feet altitude (20.6 in Hg).

intended Use:

This specification is intended for use to incorporate those requirements which are common to all designated types of Disciplined Time Frequency Standards.