The picture above is of a B&K Precision 1248 Digital IC Color Generator. This instrument produces 9 patterns for complete and easy convergence of color television receivers. Two crystal-controlled keyed rainbow color displays are provided to test color circuits, range of color control, and to align color demodulators. A front panel color level control permits displaying color saturation to any degree up to 150% of sync amplitude.
Multiple dot and crosshatch patterns are provided for adjusting horizontal and vertical linearity, centering, and size on color or black and white television receivers. Dot size and vertical line width are sharp and bright. Preset to an optimum at the factory, they can be easily readjusted to suit personal preference.
Two crystal-controlled RF channels (Channels 3 and 4) and a crystal-controlled IF output (45.75 MHz) allow signal injection at the tuner or into the IF section of a television receiver. A 4.5 MHz tuning aid is provided for easy set-up of the television receiver fine tuning.
A video output signal is also provided for signal injection into a television receiver after the video detector and for evaluation of video recorders. Positive or negative going sync of at least 1.5V pp into 75 ohms is proviced.
An oscilloscope trigger output is also provided for easy viewing of horizontal or vertical signals.
The circuitry of the instrument is based on an MM5322 custom metal oxide semiconductor (MOS) color bar generator integrated circuit manufacured by National Semiconductor.
Below is a picture of the crosshatch pattern as shown on a modern flat screen television.
Below is a picture of the crosshatch pattern as shown on a 1950 Philco television that I have. Note that the linearity of the old Philco television is quite good.
Below is a picture of a horizontal line pattern as shown on a modern flat screet television. A vertical line pattern and a vertical and horizontal line combination ("+ sign) pattern are also available as well.
Below is a picture of a 3 color bar display as shown on a modern flat screet television.
Below is a picture of a multi-color bar display as shown on a modern flat screet television.
Below are the specifications for the instrument.
Below is a picture of the protective case with the instrument inside.
