Ball Efratom MFS-207. A Modular Frequency and Time System. 
It generates precise frequency and time, through the use of a GPS receiver and a Rubidium Atomic Oscillator. 
The MFS-207 provides 20, precision 5 mHz.outputs, and 20, 1 Pulse Per Second outputs. 
They may be used to simulcast Quantar, MSF5000, Astro-Tac receivers, and similar radio equipment. 
The MFS-207 is a loaded, double height rack mount system. 
The rack contains the following modules: Front top; 
1 ea. MXO Quartz crystal oscillator, 
1 ea. MDC Frequency Synthesizer RF Switch, 
1 ea. MBF Frequency Distribution, 
1 ea. MGPS GPS Receiver. Front bottom; 
1 ea. MRK Rubidium Oscillator, 
1 ea, MGPS GPS Receiver Controller with Display. Rear top; 
5 ea. MBF Frequency Distibution 5 mHz. 4 each BNC per module, 
1 ea. MFM , 1 ea. MPS AC/DC Power Supply. Rear bottom; 
5 ea. MDP 1 PPS generation, 4 BNC outputs per module, 
1 ea. MFM and 1 ea. MPS AC/DC Power Supply.