TM 9-6695-274-14
Figure 1-28. Tracor, Model 599K, Receiver Standard.
The all solid-state Tracor, Model 599{<, Receiver Standard (fig. 1-28) has been expressly developed to utilize the highly
stabilized carrier frequency signals of VLF/LF stations for time and frequency calibration, measurement, and
standardization purposes. Phase-locked reception of these VLF signals gives long-term and short-term accuracy that is
generally several orders of magnitude better than that obtainable by reception of WWV or WWVH. Frequency
measurement to an accuracy of I part in 109 can be achieved in intervals as short as 30 minutes; observation over 24-hour
intervals gives a measurement accuracy of several parts in 1011 with the addition of the Omega option. The Omega gating
unit grounds the required blanking necessary for any particular station reception. Four front panel selector switches are
provided for the selection of the desired Omega segment.
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