Special Features:

Acc +/m 7x10-12; settability +/- 3x10-12; operating temp range 0 to 50 deg. C; stability +/- -3x10-12 over the life of the tube; spectral purity >81db for 10mhz and >87 for 5mhz; amplitude 1vrms into 50 ohm load; monitor output is a type d connector; warmup time is 20min for 10mhz and 45min for 5mhz; front panel connectors for 1pps, sync input, zeeman input, rf outputs; operating humidity, 95% up to 50c; option 010 interal standby battery and automatic charger; 018 time code output; 075 8year ceslum beam tube warranty; 099option package including ether 1 mhz or 100 khz and internal tod display with 1ppsadvance/delay

Properties:

An item that can generate a fundamental frequency with a high degree of accuracy. Harmonics of this fundamental are then used as a reference point for checking throughout the radio spectrum. The standard may be stable crystal oscillator, noncrystal oscillator, tuning fork, atomic beam, molecular beam, gas cell, quantum mechanical resonator, or the like.