The 5.P Frequency Standard Power Supply is used to power the 5B Frequency Standard. It is the same size and shape as the frequency standard and will provide up to 10 hours of self-powered operation. It can be powered at either 115 or 230 volts, 48 to 400Hz, and will automatically maintain its batteries in a fully charged condition. Change-over from line to battery supply is accomplished with no loss of stability or output.
