The HCP2550A is a high quality, frequency agile channel processor capable of converting any VHF, UHF or CATV input signal to any standard output channel between 54 and 550MHz. Input and output frequency are easily set with front panel push wheel switches. Selectable preamp and AFC provide stable reception of weak or out-of-tolerance signals. A/V ratio and output level controls are also provided along with IF loop-thru connections to offer exceptional flexibility. The synthesized input tuning permits reception of Off-Air TV channels 2 through 69, standard CATV channels 2 through 125, and IRC, HRC channels 1 through 125. Selectable preamp ensures reliable reception of weak input signals. Selectable AFC ensures that out-of tolerance cable channels, VCR modulators or UHF translator signals will not affect IF or RF output frequencies of HCP2550A. Front panel indicator lights for signals that are within AFC lock range. Selectable and adjustable threshold level control for input signal level is also provided. An internally generated carrier is substituted for input signals below set threshold level. Front panel signal indicator lights for input signal strengths greater than a threshold value.