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Eight loop-through video inputs allow direct connection of the monitor into different points of a system without the requirement of an external routing switcher. For the Series, the eight inputs may be configured for individual composite, or two composite plus two three-wire component signals. A ninth loop-through input accepts an external system reference signal.
Eight video inputs eliminate the requirement for external input selectors, reducing total system cost in many applications. Since all eight inputs are connected directly to the instrument, signals may be paraded, overlaid, or displayed in comparison modes not normally available with a simple external switcher. Waveform monitoring is analog for maximum waveform fidelity. There is no digital processing of the displayed signal.
The selected input may be displayed in one or two line or one or two field sweeps on a continuous basis or identified lines of any field may be selected and displayed. Multiple inputs may be displayed at the same time, or multiple filters may be applied to one input for signal analysis. Time and voltage cursors may be activated and positioned for reference or measurement. A microprocessor controlled phase shifter provides accurate vector positioning and eliminates readjustment when switching between internal and external reference modes.
Phase and amplitude cursors with on-screen readout allow system setup to reproduce specific chroma values, and specific colors when luminance is similarly set using the waveform display voltage cursors.
A Picture Monitor mode is provided for easy signal identification. This is particularly useful when the instrument is used to monitor many sources, as in a production suite or outside production vehicle.
In waveform or vector line select mode, a line bright-up marker in the picture display identifies the selected line. The operator can quickly see that the program audio will be properly reproduced on both monaural and stereo receivers.
Audio frequency -3 dB bandwidth is kHz. Phase match between the left and right channels is better than 1 degree at 20 kHz. Input is high impedance bridging, either balanced or unbalanced, to allow signal monitoring of existing audio circuits. This display of stereo audio is intuitive and easy to use, and has gained wide acceptance in new generation Tektronix vectorscopes.
Longitudinal time code is monitored in a frame rate display to allow observation of amplitude, synchronization and phase with respect to reference vertical. Synchronization is confirmed by the stationary display and time code phase is easily determined by horizontal position of the time code sync word on the CRT.
These monitors provide multiple display modes , allowing simultaneous observation of the many important parameters that make up a television signal. For example, vector, waveform, and audio may be displayed together for an indication of signal quality without operator intervention. Sync jitter over the field is displayed as a moving sync vector dot, or displayed as a timing error at a vertical rate to identify the relationship over the field time.
Correct color framing is quickly verified by the position of the single sync vector dot relative to the color subcarrier vector when the monitor is externally referenced. Using this method of determining relative SCH phase and color framing eliminates the requirement for a precise horizontal timing match between the reference and measured signals, and an external color-field identification input is not required.
Characteristic of current generation Tektronix instruments, an intuitive operator interface allows full instrument utilization with minimal reference to the provided user and maintenance manuals. Operating modes, any of eight video inputs, and key control knobs and buttons are always available for direct access from the front panel.
To keep operation easy and straightforward, the A, A and family "learns" the user's preferences for waveform, vector and picture modes and SCH in the A and with the SCH option. Returning to one of these modes restores the previous configuration. Changes to a mode configuration are easily made using front panel buttons, supplemented by screen-labeled buttons and knobs. Knob operations such as position, gain, phase, etc. For example, a program line or off-air VITS may be set up as preset number 3.
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