TEKTRONIX - VITS 201 INSERTION GENERATOR PAL À L'UNION

TEKTRONIX VITS 201 INSERTION GENERATOR PAL ******************************** DESCRIPTION NON CONTRACTUEL: Analog Generator VITS201 Features & Benefits - Digital Composite Signal Generation - CCIR, EBU, UK National ITS - Operates in the Presence of Sound in Syncs - Four External ITS Inputs - Source Identification - Program Line Sync and Burst Regeneration - Loss of Program Input Modes: - External Input to Program Out - Internal Generator to Program Out - Program Line Bypass - User Programmable Text Generator Provides: - Message in Program Line Vertical Interval - Message in Active Picture Area for Loss of Program Input Modes - User Programs for: - Insertion of Internal, External, and Source Identification Signals - Loss of Program Input Modes Text Insertion - All User Program Settings Saved in Nonvolatile Storage - Monitor Output - Remote Control Applications - VITS Insertion for Broadcast Video Applications The VITS201 is a low cost, high quality ITS generator and inserter/deleter with features found only in the most expensive transmission grade ITS inserters. In addition to a solid basic generator/inserter unit, the VITS201 provides loss of program continuity modes, multiple inputs for external data insertion, source identification, a text generator for message insertion and a versatile programmer with nonvolatile memory storage for setting up the unit's operation and loss of program modes. Test Signal Generator The VITS201 uses digital signal generation and a precision 12-Bit DAC to ensure signal accuracy and long term stability. Digital generation of the composite signal with conversion to analog using a single DAC ensures accurate chrominance-to-luminance gain and timing. The VITS201 generates the following signals: - CClR 17, 18, 330 and 331 - U.K. National - GCR - 75% color bars - Sin (x)/x - Luminance ramp - 0% and 100% luminance levels Inserter/Deleter Functions The VITS201 may be programmed to insert any internally generated signal, external input, or the source identification signal on any line from 7 through 30 and 319 through 343. If desired, the same signal or external input may be programmed for insertion on multiple lines. This may be useful in insertion of teletext and other data signals. Four external ITS inputs are provided for insertion of externally generated test and data signals. All inputs are AC coupled and clamped. The VITS201 assumes the external input signals are locked to the program signal and correctly timed. Delete and pass functions are available for the same lines as the insert function. Program Channel Maintaining transparency and continuity of the program channel is a prime consideration in the VITS201. Distortions and transients are virtually eliminated by the Tektronix developed channel switch integrated circuit. Insertion or deletion of ITS can occur only when genlock to the program input signal is attained. Loss of mains power or genlock causes the program line to be bypassed. Program signal delay in operate and bypass is matched. The VITS201 provides for replacement of the program line sync and burst signals with the internally generated sync and burst signals. This ensures the proper amplitude relationship of the inserted ITS to the sync and burst signals is established prior to inputting the signal to the broadcast transmitter or transmission system. Timing of the active video to the blanking interval is not affected in the sync and burst regeneration mode. Loss of the program input signal will automatically enable one of three program line output states: - Program line bypassed - A user selected external input will be routed to the program line output - A user selected internally generated signal will be routed to the program line output When an internally generated signal is selected, a message may be superimposed over the active picture area. The