The SPECTRACOM MODEL 8164 WWVB RECEIVER DISCIPLINED OSCILLATOR* is a frequency standard with accuracy directly traceable to the National Bureau of Standards. The SPECTRACOM MODEL 8206 ferrite loop antenna is used to receive to 60 kHz carrier of WWVB. The Model 8164 is continuously monitored against WWVB and kept on frequency by a microprocessor. The oscillator outputs can be used as a precise external input for transmitters, receivers, counters, synthesizers, and other electronic equipment. Figure 1-1 shows the Model 8164 Disciplined Oscillator and the Model 8206 Antenna. 1.1 FEATURES The Model 8164 WWVB Receiver-Disciplined Oscillator offers the following features: BUILT-IN PHASE COMPARATOR - may be used to compare the phase of the internal ovenized oscillator or local input with the received WWVB signal. Results are recorded on the strip chart recorder. TRACEABILITY - verification to the National Bureau of Standards is done by noting the hourly WWVB phase shift identification. The hourly offsets appear as "tick” marks on the strip chart recording. ALARM STATUS - operational status is communicated by alarm lamps and RS-422 alarm outputs. SELECTABLE FRONT PANEL OUTPUTS - 0.1, 1.0, 5.0 or 10 MHz TTL compatible signals of the phase locked and standard oscillator outputs. FREQUENCY OFFSETS - with the addition of a frequency offset option, the internal 10 MHz standard oscillator is offset a precise amount. The offset frequency used as a reference to a television or paging transmitter reduces or eliminates co-channel interference. DISTRIBUTION OUTPUTS - with the addition of Option 03, Built-In Distribution Amplifier, up to 25 remote stations may use the standard outputs as a common time base.