The PDI-5061M & PDI-5061MS are space saving, user friendly, 132 channel, frequency agile modulator systems. They consists of 6 individual, vertically mounted, agile modulators, an efficient switching type power supply module and a micro controller module in one 5-1/4” high housing. Each modulator is SAW filtered and provides precise channel selection for all VHF and cable channels from channel 2 through 134 (54-860MHz) including A-1 to A-5. Channel selection is easily accomplished with up/down push switches from the front panel of the micro controller. The number is displayed simultaneously on the micro controller LCD screen and on the modulator module 7 element LED. Additional adjustments for depth of modulation, audio deviation and audio to video ratio for each modulator are read on an LCD screen with an “N” (normal), “L” (low) and “H” (high). This allows easy setup by the technician without expensive test equipment.. The micro controller also allows easy selection of HRC, IRC or STANDARD and 0, 12.5 and 25kHz offsets with the front panel push switches. Channel selections are protected by a non-volatile memory that restores the channel automatically in the event of a power failure. A composite IF loop is provided for scrambling or EAS operation.