Tektronix TSG170A Overview

Features

• Simple, Effective Test Signal Complement
• Master Sync Generator with Digital Genlock
• Separate Timing Controls for Sync and Test Signals
• Separate SMPTE Color Bars Output with Programmable ID (Opt. 01)
• Audio Tone Output (Opt. 01)
• Tape Leader Countdown (Opt. 01)
• Opt. 1V Signal Set for VM700T Measurements

Appications

• Test Signal and Sync Generation for Broadcast and Post Production
• Equipment Maintenance The Tektronix TSG170A NTSC Television Generator offers you the test signals you need plus the advantages of master and genlock sync capability. It provides true 10-Bit digital signal accuracy with a full complement of test signals and a stable master sync generator. The rugged, compact TSG170A is designed to support both operational and maintenance requirements. The TSG170A Option 01 provides even more versatility by adding a separate SMPTE color bar generator, programmable identification, audio tone output and tape leader countdown.

Test Signal Generator
The accuracy and long term stability of the TSG170A test signals are enhanced by its precision digital to analog converter. Each converter is automatically laser trimmed to 12-Bit accuracy. The TSG170A test signal generator's simple front panel controls provide selection of:

• SMPTE color bars
• Convergence
• Pulse and bar with window
• Multiburst
• 5-step luminance staircase
• Luminance ramp
• Modulated ramp
• Selectable 10% or 90% APL
• Bounce
• 10 and 100 IRE flat fields
• Red field
• Multibars
• NTC 7 composite
• System test matrix
• Monitor setup matrix
• 5 MHz line sweep
• Multipulse Color bar blanking width is 10.9 µs to facilitate verification of proper blanking throughout your system.

VM700a Measurements
A signal set designed specifically to support VM700A measurements is now available for the TSG170A. The new matrix is composed of FCC color bars, 50% flat field, NTC 7 combination and composite, (Sin x)x, red field and chroma frequency response.

Master Sync Generator with Digital Genlock
The TSG170A sync generator's stable color standard and unique digital genlock make it ideal for either master generator or slave operation. All outputs are correctly SCH phased, even if the TSG170A is locked to an improperly SCH phased reference input. The digital genlock calculates sync timing and subcarrier phase to properly identify color framing of the input reference signal. The TSG170A automatically senses composite video or 3.58 MHz subcarrier reference inputs and, in the absence of a reference input signal, automatically switches to its own internal reference. This high stability crystal oscillator, with its constant temperature oven, ensures long term frequency stability.

System Timing Control
Front panel controls are provided for phasing of all outputs relative to the genlock source. In addition, a separate set of timing controls is provided to move the pulse and subcarrier outputs relative to the black burst and test signal outputs. This simplifies system timing and eliminates delay lines. Up to eight genlock and sync timing settings may be stored in nonvolatile memory to prevent loss in the event of a power failure. The timing presets may be recalled through the remote control port. A front panel lockout feature prevents inadvertent changes to the front panel timing controls.

Flexible Pulse Output
The TSG170A has eight sync generator outputs; four fixed and four programmable. The primary outputs for SUBCARRIER, SYNC, BLANKING and BLACKBURST are fixed. The secondary outputs, BURST FLAG, H DRIVE, V DRIVE and COLOR-FRAME PULSE, are programmable and can be changed to provide a second set of primary outputs. The BLANKING output may be set to 10.2, 10.7 or 10.9 µs.

SMPTE Color Bars with Programmable ID, Audio Tone and Tape Leader Countdown (Option 01)
Option 01 adds a separate SMPTE color bar output for routine studio needs, such as tape leaders, freeing the front panel selected test signals for engineering and maintenance. An ID of up to 12 alphanumeric characters may be inserted in the SMPTE color bar output. This front panel programmable ID is ideal for identifying satellite feeds and videotapes. Option 01 also provides a 450 Hz audio tone output, useful for checking program line continuity and adjusting audio levels. The tone can be adjusted over a 0 dBm to 8 dBm range into 150 Ohm or 600 Ohm. Also included in Opt. 01 is a tape leader countdown. When initiated, the full time SMPTE color bars output goes to black and the audio tone is switched off. Simultaneously, a ten-to-two (in seconds) countdown is initiated and overlaid on the black background. The black background remains until the count down program is terminated. Control of the tape leader countdown is through the remote control connector.

Remote Control
Remote selection of internal/external reference, ID preset, genlock and sync timing presets and test signal is provided. Selection is made with ground closures through a rear panel connector.

Packaging
The TSG170A's rugged, 1.75 inch package makes it ideal for remote vans or anywhere space is at a premium.

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