The converter runs at 9600 baud, 89C2051 and outputs each byte received on a centronics style parallel port, together with a nominal 50 microsecond strobe. The converter buffers up the bytes received if busy is active, and is bidirectional – when the sample switch is pushed, the converter samples the parallel port and transmits the [...]

The converter uses no filters and is thus pretty broadbanded. All selectivity is trusted to the DB6NT converter and the Yaesu radio. The power supply is regulated by a three terminal voltage regulator, so the frequency won’t shift with input voltage fluctuations. The converter applies 13.8V to the coax line going to the antenna-mounted converter, [...]

An analog to digital converter converts an analog input voltage into a digital value. This is a circuit for shows the analog to digital converter. This circuit is using microcontroller ATmega8 for control the operation. This is the figure of the circuit.
The resolution of the converter indicates the number of discrete values it can produce. [...]