CV-1250

Vectorscopes CV-1250

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Outline

The CV-1250/1255 are NTSC/PAL vectorscopes which can display the amplitude and phase of the chrominance component of the video (composite video) signal in the form of vectors. An 150 mm high-intensity CRT is used to enable the observation of the hue and saturation of composite video signal based on the NTSC or PAL format. The auto-focusing function makes the observa-tions more accurate and smoother.

Features

●High-intensity CRT (12 kV) An 150 mm, rectangular CRT with internal graticule is driven at an accelerating voltage of 12 kV to allow bright, easy-to-see observations free of parallax. ●Auto-focusing The auto-focusing function allows you to observe complex video signals more accurately and more smoothly. ●Scale illumination The scale illumination is used to facilitate observations under low light conditions. When taking pictures, the illumination allows you to photograph the scale together with the waveforms. ●Loop-through configuration The A input, B input and C input are looped through and each of them can internally be terminated at 75Ω with a rear panel switch. ●UNCAL indicator The UNCAL lamp lights up to indicate the uncalibrated condition when the GAIN control is in other position than the calibration position. ●Other features ●The Z axis input connector for blanking is provided so the line selection is possible by connecting a waveform monitor (CV-1240 or CV-1245). ●The saturation can be switched to 75% and 100% with a front panel switch. ●The scales for measuring the differential gain and differential phase are provided. ●The setup can be switched to 0% and 7.5% from the front panel (CV-1250 only). ●Two units can be mounted side-by-side in a generally-marketed 19" rack. ●A spot killer is provided to prevent the CRT burn when there is no signal input. ●The supply voltage can be switched on at the rear panel. ●SPECIFICATIONS SPECIFICATIONS MODEL CV-1250 CV-1255 CRT 150mm rectangular? with internal graticule? post-accelerator Accelerating voltage : 12kV? Fluorescent material : P31 Effective area : 80×100mm Input /Amplifier Input A? B? C Video signal or subcarrier-signal Input terminal BNC-connector? loop-through Input impedance 2MΩ or 75Ω selectable Input range A? B? C ; 1Vp-p composite video signal C SUB ; 2Vp-p subcarrier approximately on the circumference Fine adjustment range Approx. 0.5 times to 5 times Maximum input voltage ±5V (DC ACpeak) Chrominance characteristics Frequency range Center frequency Fsc=3.579545MHz Fsc=4.43361875MHz -3dB for upper-side frequency Fsc 500kHz±100kHz -3dB for lower-side frequency Fsc-500kHz±100kHz Vector display Phase : within ±2° Amplitude : within ±3% DG? DP display DG : within ±1% DP : within 1° Horizontal synchronization Synchronization polarity Negative Synchronization level 286mV±6dB/300mV±6dB Subcarrier synchronization Pull-in range Fsc±50Hz Burst synchronization level 286mV±6dB/300mV±6dB Continuous wave level 143mVp-p～4Vp-p/150mVp-p～4Vp-p Phase adjustment range 360° variable Calibration Test circle The test circle is drawn with the entered chrominance signal in an synchronous condition. Blanking input Input voltage DC±1V (bright display at positive) Maximum input voltage ±10V (DC ACpeak) Others Power source 100/120/220V? 216 to 250V AC 50/60Hz? 46W Case dimensions 215 (W)×132 (H)×430 (D) mm Weight Approx. 7.8kg Accessories Instruction manual (1) BNC cap (7) Power cable (1)