S/PDIF test generator

The generator is intended primarily for checking S/PDIF (Sony/ Philips Digital Interface Format) receivers and any associated digital-to-analogue converters (DAC) and/or output filters. The external clock – standard TTL level – enables 128 sample frequencies to be generated. The clock may also be used for generating standard frequencies with the remaining inverters serving as crystal oscillators (provided a 74HCU04 is used).