8VSB is the modulation standard for American over the air broadcast. QAM is the modulation standard for American cable television. The Channel Catcher 8VSB+QAM/ASI™ is a high density receiver that complies with both standards. The off air multichannel demodulator receives either 8VSB or QAM signals and outputs the demodulated transport streams for digital turnaround applications. The Channel Catcher demodulates one to eight separate 8VSB or QAM signals, depending on the number of compact demodulators loaded into the 2 RU unit, and converts them to DVB-ASI. The standard system consists of a single demodulator, power supply, and 2 RU chassis. Add up to seven optional demodulators to create a space-saving solution for broadcast facilities. (A second power supply is required for five or more demodulators.)