THE MODE CONTROL MUST BE FULLY COUNTERCLOCKWISE. There is also a BAND “CTR” (COUNTER) that has no offset, that is available any time so the unit can double as a bench counter up to 40MHz. The calibration information is also stored in memory, so that any time you return to that band, the display is automatically calibrated. For example two 16 band, four 8 band, or any other combination totaling 32 or less can be programmed.Įach band can be individually calibrated to allow for crystals that have aged or any other error no matter where is comes from, to 10Hz accuracy. You can even use the 32 bands to manually program the unit for multiple receivers or transmitters. There is also a manual program mode that lets you program the dial for any receiver or transmitter (up to 32 bands) that is not pre-programmed. This allows the operating frequency to be displayed by counting only the VFO, sometimes called PTO or LMO signal. All of the VFO and band information for many receivers and transmitters is pre-programmed into the display's memory. Service manual & repair info for electronics experts.ĮSP DD-103 Universal Digital Dial DD-103 INSTRUCTIONS DD-103 Universal Digital Dial Instruction Manual Electronic Specialty Products 3054 Moore Drive Oviedo, FL 32765 40 GENERAL DESCRIPTION The Model DD-103 Universal Digital Dial works with any receiver and most transmitters by counting only the VFO signal.
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