The 5851V is a color TV system vectorscope for vector display of relative amplitude and phase of chrominance components contained in composite video signals on the CRT. The phase (direction of rotation) and amplitude (radial length from the center) of chrominance components against burst signals can be measured by demodulating chrominance components, which convey color information in video signals and by vector-displaying them on the CRT. As the scale is provided on the internet graticule (with the same illumination), it is possible to measure color bar signal without parallax reading error.

Master Frequency Reference TCXO
Composite Video Signal Input	Input A, Input B, EXT. REF (subcarrier)
Chrominance	Phase: Amplitude: Differential Phase: Differential Gain: ±2° ±3% ±1° ±1%
Measuring Items	Vector measurement (Phase and Amplitude)
Dimensions (W.H.D.) / Weight	215 × 132 × 429 mm / 7.3 kg