VIDEO MODULATOR

This modulator unit operates from a nominal 9 volt supply (use 220 ohm resistor in series for 12V) and outputs on either CH3 or CH4, depending on connections. It is useful for interfacing video kits to a TV receiver having no direct video and audio input facilities. In most cases the DC power needed for the modulator can be taken from the same source as the kit. Audio is also supported. The modulator comes with an application diagram. Specs are as follows:

                RF output                1 millivolt into 75 ohms 
            Frequency               VHF CH3 or CH4 (61.25 /67.25 MHz)
            DC power source         8 to 9 V negative ground
            Video Format            NTSC
            Audio Subcarrier        4.5 MHz
            Video input             1 V p-p NTSC neg sync 75 ohm
            Audio input             Line level 0.5 to 1 v rms hi-z
            Mechanical Size         2.75" L X 1.40"H X 0.75"W
            Connectors              Type F for RF output
                                    Wire leads for DC, audio, and video in.

The modulator can be used with the following kits and other items for interfacing purposes:

• Sync Regenerator
• Video Master
• Video Palette II