WVR500

Waveform/Vector Rasterizer
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Features & Benefits

  • Rasterizes NTSC or PAL Video Signal for Picture Monitor Display
  • High Quality Display of Live or Test Waveforms
  • Full Field or Cut-in Waveform and Vector Displays
  • Safe Title/Safe Action Area Indication
  • 4:3 or 16:9 Display Formats
  • No Processing of Picture, Even in Cut-in Modes
  • Line Select for VITS Observation
  • Local or RS-232 Control
  • Small, Single Unit Package
  • Compatible with Tektronix Mounting System
  • Ideal for Dual Standard Applications
  • Safety Certified to UL, CSA, and VDE Standards, Meets 89/336/ECC

Applications

  • Low-cost Video Monitoring
  • ENG/SNG Setup and Monitoring
  • Remote Microwave and Transmitter Monitoring
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PAL color bars waveform display.

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Line select display.

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NTSC vector display.

The Tektronix WVR500 Waveform/Vector Rasterizer is a one-half rack width, one rack unit high device that provides a compact and economical solution for monitoring the waveform and color vector display of an NTSC or PAL television signal. The waveform or vector is displayed on a standard NTSC or PAL picture monitor, either full-screen or cut into the picture display. A signal may be displayed locally or at remote locations within reach of a video circuit. The WVR500 provides the composite NTSC or PAL signal monitoring features expected in a two input combination waveform/vector monitor, including flat and filtered waveform displays in 1H, 2H, and field rate sweeps, H & V magnification, full field or line selected.

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NTC7 Composite test signal display.

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Waveform and vector displays cut into picture.

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Magnified display of 2T and modulated 12.5T pulses.

The vector display may be rotated or magnified. Either waveform or vector may be displayed on an existing picture monitor full screen, and one or both may be cut into the color picture. The output of the WVR500 is NTSC or PAL and may be routed to a remote picture monitor via standard video circuits.

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WVR500 output may be routed into any signal monitoring path. (Video courtesy of KGW-TV, Portland, Oregon.)

The display quality of the WVR500 is outstanding. There is no processing of the picture video passed through the unit. All graticules are electronically generated for maximum clarity. Waveform and vector displays utilize a Tektronix-developed rasterizing technology and exhibit much of the look and clarity of a conventional electrostatic CRT. Particular attention has been paid in the development of this new technology to retaining display fidelity with both live video and video test signals.

The compact size of the WVR500 allows mounting at the operator position with a minimum of panel space. The rasterizer may be connected via a single video feed to a picture monitor or may be installed in a routing system for display through any signal monitoring path.

The WVR500 waveform/vector rasterizer is used in applications where monitoring is desired, but previously not possible due to distance between the monitoring connection and the operator. Typical applications include remote monitoring of VTRs, satellite uplinks/downlinks, and remote microwave and transmitter sites where a return video link is available.

The WVR500 is ideal for cable, network, telephone company and satellite video operating centers where many feeds are simultaneously monitored using continuity picture monitors. A questionable feed may be quickly checked for proper video level, hum, tilt or interference. Using the cut-in waveform feature, the operator can easily confirm he is checking the desired signal.

In the production control room, the WVR500 may be assigned with the routing switcher, providing waveform and vector monitoring on-demand for many production sources. Simultaneous observation of creative effects and technical signal parameters is now straightforward.

Using the WVR500, compact production systems and news-feed vans can now have high quality waveform and vector monitoring functions with a minimum of additional rack space. Systems operating across international borders will find menu selection of PAL or NTSC and operation on a wide range of AC mains voltages convenient.

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WVR500 Front Panel.

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WVR500 Rear Panel.

In technical education and video training, the WVR500 allows display on large classroom monitors. Now both the instructor and students can see and understand the same display.

The WVR500 is intended to be permanently connected into a system. While not specifically designed for desktop video or one-man electronic field production applications, it will be valuable in setting up and operating such applications when a conventional waveform monitor is not available.

Characteristics

Vertical Deflection System (1.0 v signal, x1 Gain)

Frequency Response -

FLAT: 50 kHz to 6 MHz within 2% of response at 50 kHz.

LOW PASS: ≥30 dB attenuation @ 4.0 MHz.

Transient Response (2T pulse or 2T bar) -

Preshoot: ≤1%.

Pulse-to-bar ratio: 0.99:1 to 1.01:1.

Overshoot: ≤2%.

Ringing: ≤2%.

Tilt: Field rate square wave or 25 µs bar, ≤1%.

Overscan: ≤2% variation in baseline of 700 mV 20T modulated pulse as it is positioned over the middle 80% of screen.

Differential gain: ≤1%, 10% to 90% APL.

Deflection Factor - 1.0 V input displayed as 1.0 V within 1%.

Input signals between 0.8 V and 2.0 V can be adjusted to 1.0 V (140 IRE) display.

1.0 V signal can be positioned so that peak white or sync tip can be placed at blanking level, with DC RESTORER on in any gain setting.

Signal Input -

Maximum operating input voltage: ±5 V DC + peak AC.

DC input impedance: ≥15 kilΩ.

Return loss: CH-A, CH-B, ≥40 dB from 50 kHz to 6 MHz.

Video Output -

Differential gain (50% APL): Within 1.0% with a 1.0 V (140 IRE) display.

Differential phase (50% APL): Within 1° with a 1.0 V (140 IRE) display.

Return loss (75 Ω): ≥30 dB from 50 kHz to 6 MHz.

Input to video output gain ratio: 1:1 ±5% @ 15 kHz.

DC Restoration - Clamped on back porch.

Attenuation of field rate hum on input signal: SLOW ≤20%, FAST ≥90%.

Blanking level shift with APL change from 50% to 10% or 90%: ≤7.14 mV.

Blanking level shift due to presence or absence of burst: ≤7.14 mV.

Horizontal Deflection System

Sweep will occur in all Horizontal mode settings, with or without synchronization.

Any portion of a synchronized video sweep can be positioned on screen in all sweep modes.

2 FIELD displays 2 full fields, including the field rate sync between them.

2 LINE, 10 µs/div.: Within 2%.

1 LINE, 5 µs/div.: Within 2%.

2 LINE+MAG, 1 µs/div.: Within 2%.

1 LINE+MAG, 0.5 µs/div.: Within 3%.

Integral linearity: Within 1%.

Synchronization -

Internal reference: Composite video or black burst with sync amplitude of 300 mV (PAL) or 40 IRE (NTSC), ±6 dB.

External reference: sync amplitude between 143 mV and 4.0 V will synchronize sweeps.

EXT REF input DC impedance (unterminated): ≥15 kilΩ.

EXT REF return loss (75 Ω): ≥40 dB from 50 kHz to 6 MHz.

Vector Mode

Chrominance Processing Nominal Subcarrier Frequency -

NTSC: 3.579545 MHz.

PAL: 4.43361875 MHz.

-3 dB Chrominance Bandwidth: Fsc ±500 kHz, ±100 kHz.

Vector Phase Display Accuracy: ±1.25°.

Subcarrier Regenerator -

Pull-in range: ±50 Hz (NTSC) or ±10 Hz (PAL).

Phase shift over pull-in range: ±2°.

Phase shift with ±6 dB burst amplitude change: ±2°.

Burst jitter: ±0.5° RMS or less.

Display Characteristics -

Differential phase: ±1°.

Differential gain: ±1%.

Power Source

Mains Voltage Range - 90 V to 250 V.

Mains Frequency Range - 48 Hz to 66 Hz.

Power Consumption - 25 W maximum.

Environmental

Temperature -

Operating: 0 °C to +50 °C.

Nonoperating: -55 °C to +75 °C.

Altitude -

Operating: to 2,000 m (6,500 ft.).

Nonoperating: to 15,240 m (50,000 ft.).

Vibration - Military specification: Mil-T-28800D, paragraph 1.2.2, class 3.

Mechanical Shock - 30 G's, 1/2 sine, 11 ms duration, 3 shocks per surface (18 total).

Transportation - Qualified under NTSC test procedure 1A, category II (24 in. drop).

Humidity - 95% relative humidity cycling up to five days. Do not operate with visible moisture on circuit boards.

Certifications

EMC - Certified to the EMC Directive 89/336/EEC.

Safety -

Approved to: UL1244, CAN/CSA-C22.2 No.231.

Complies with: EN61010-1, IEC61010-1.

Physical Characteristics

Dimensions

mm

in.

Weight

kg

lbs.

Height

44.5

1.75

Width

203.2

8

Length

469.9

18.5

Approximately

1.8

4

Last Modified: 2002-12-01 04:00:00
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