TEK TSG-170A Television Generator

The Tektronix TSG-170A 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 TSG-170A is designed to support both operational and maintenance requirements. The TSG-170A Opt. 01 provides even more versatility by adding a separate SMPTE color bar generator, programmable identification, audio tone output and tape leader countdown.

The accuracy and long term stability of the TSG-170A test signals are enhanced by its precision digital to analog converter. Each converter is automatically laser trimmed to 12-Bit accuracy. The TSG-170A 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.

A signal set designed specifically to support VM700A measurements is now available for the TSG-170A. This signal set is available as Opt. 1V and differs from the standard signal set as follows:

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.

The TSG-170A 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 TSG-170A 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 TSG-170A 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.

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.

The TSG-170A 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.

Opt. 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.

Opt. 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 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.

The TSG-170A's rugged, 1 3/4 inch package makes it ideal for remote vans or anywhere space is at a premium

• 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

• Test Signal and Sync Generation for Broadcast and Post Production
• Equipment Maintenance
• Digital Composite Plant Operations

Luminance Amplitude Accuracy - ±1%.

Chrominance-to-luminance Gain - ±1%.

Output Impedance - 75 Ohm.

Return Loss - 36 dB to 4.2 MHz.

Convergence - 14 lines per field, 17 lines per horizontal.

Pulse & Bar with Window -
2T Pulse HAD: 250 ns ±25 ns.
White Bar Amplitude: 100 IRE.
Field Tilt: 0.5%.
Line Tilt: 0.5%.

Multiburst -
White Reference Bar Amplitude: 428.6 mV (60 IRE).
Packet Amplitude: 428.6 mV (60 IRE) p-p.
Burst Frequencies: 0.5, 1.0, 2.0, 3.0, 3.58 and 4.2 MHz.

5-Step Staircase - 714.3 mV (100 IRE).

Luminance Ramp - 0 to 714.3 mV (100 IRE).

Modulated Ramp -
Chrominance Amplitude: 285.7 mV (40 IRE).
Diff Gain: 0.6%.
Diff Phase: 0.3.

APL - 10% and 90%.

AC Bounce - Bounce Rate: 1 second high, 1 second low.

Flat Fields - 10 IRE, 100 IRE.

Red Field - Luminance Pedestal: 153.6 mV (21.5 IRE).

Multibars - Color bars and multiburst.

NTC 7 Composite - 80 IRE, 5-step modulated staircase and pulse & bar.

Line Sweep - 714.3 mV_p-p. Linear sweep from 500 kHz to 5 MHz.

Multipulse -
Amplitude: 714.3 mV.
Frequencies: 0.5, 1.0, 2.0, 3.0, 3.58 and 4.2 MHz.

System Test Matrix - Multibars and NTC7.

Monitor Setup Matrix - Convergence, IWQB, convergence, color bars, reverse bars and convergence.

DAC Test - 500 kHz and 3.58 MHz.

Opt. 01 Color Bars - SMPTE color bars.

Identification - 12 characters, 7 x 9 matrix.

Audio Tone - 449.55 Hz (locked to vertical), distortion less than 0.01%, 0 to 8 dBu into 150 Ohm, 600 Ohm or high impedance. Click ID adjustable 0.2 to 4 Hz.

Subcarrier Stability - 3.579545 MHz ±1 Hz over temperature; typically less than 1 ppm per year drift after initial aging.

Black Burst Output -
Setup: 7.5 IRE.
Blanking: Less than 10.6 µs.

Pulse Outputs (General Characteristics) -
Amplitude: 4.0 ±0.1 V.
Impedance: 75 Ohm.
Return Loss: 30 dB to 4.2 MHz.
Rise Time: 140 ns ±20 ns.

Pulse Outputs (Signals) -
Composite Sync -
Blanking:

Burst Flag.
Horizontal Drive.
 Vertical Drive.
Color Frame Pulse: Field 1, Line 11.

Subcarrier Output - Amplitude: 2 V_p-p ±0.2 V.

Pulse and Subcarrier Outputs - Timing Range: 4 µs advance, 4 µs delay relative to the test signal and black burst outputs.

Genlock Source (Comp Video) -
Input Configuration: 75 Ohm loop-through.
Return Loss: At least 40 dB to 4.2 MHz.
Burst Amplitude: 286 mV +1 dB to -6 dB.
Sync Amplitude: 286 mV +3 dB to -6 dB.

Genlock Performance -
Horizontal Timing Range: 8 µs advance, 8 µs delay.
Vertical Timing Range: 0, 1 or 2 lines advance or line delay, jumper selectable.
Burst Lock Range: 3.579545 MHz ±20 Hz.
Jitter: 0.5°.

Mains -
Voltage Range: 90 to 132 V AC or 180 to 250 V AC.
Frequency Range: 48 to 62 Hz.

Power Consumption - 40 W typical, 60 W maximum.

Temperature -
Operating: 0° to 50°C.
Nonoperating: -40 to 65°C.

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

Safety -
Approved to: UL1244, CSA231.
Complies with: EN61010-1, IEC61010-1.