Phoenix Engineering RoadRunner digital turntable-platter speed-readout 100-240v

This product is designed, manufactured and shipped from the USA. The RoadRunner is a microprocessor controlled digital tachometer used for monitoring turntable platter speed to 3 decimal places of resolution. The internal time base is a temperature compensated crystal oscillator (TCXO) accurate to 2.5 PPM (±0.00025%) with less than 1.0 PPM aging per year. The tachometer uses a hall effect sensor and a small magnet attached to the underside of the platter to sense the platter rotation. The tachometer can be connected directly to the Falcon PSU (Sold Separately) via a 3 wire serial cable in order to synchronize the platter speed. Operation is completely automatic with no user intervention needed. The tachometer outputs the speed reading once per revolution. The PSU compares this reading to the speed on the display and can make micro-fine adjustments to the output frequency to lock the turntable speed to within ±0.005 RPM. The adjustment is done slowly and evenly over the entire next revolution and is inaudible to the listener (in most cases, the adjustment is <0.0005 RPM per step). The turntable remains on speed independent of the belt tension, bearing oil viscosity, drag from the needle or any other variables that cause the table to drift over time with speed. Physical: Dimensions: 3.565";L x 2.50";W x 1.1875";H. Weight: 4 oz. Case: 1 piece Extruded Aluminium. Operating Modes: Standby, Sleep, Normal. Power Requirements: DC Supply 9VDC 100 mA nominal; 5mA Sleep Output: Display: 6 digit LED direct readout of platter speed in RPM Resolution: 0.001 RPM Serial Data: 3.5mm connector 9600N81 DCE Freq Stability: Crystal Controlled ±2.5PPM (±0.00025%)