后面板

视频信号源 TSG-271

厂家: 美国泰克
尺寸: 44x483x561 mm
重量: 7 kg

TSG271 PAL电视信号发生器式一台综合性的电视测试信号源。它同时可作为集中的高稳定度的同步信号发生器。

用户可以选择以下测试信号：

• 彩条
• 红底及彩条
• 图像监视标准信号（Plug）
• 汇聚
• 白窗口
• 灰窗口
• 斜坡
• 调制斜坡
• 阶梯波
• 调制阶梯波
• 带有窗口的脉冲和条脉冲
• 场方波
• 多脉冲
• 多波群
• 行扫描
• SinX/X
• 平场
• 红场
• 插入测试信号
• 平均图像电平

The TSG-271 PAL Television Generator provides a comprehensive set of test signals integrated with a high stability master sync generator. The TSG-271 is well suited for operational applications as well as equipment performance verification and maintenance.

The TSG-271 uses digital signal generation and a precision 12-Bit DAC to ensure test signal accuracy and long term stability. Digital generation of the composite PAL signal, without analog modulators, allows use of a single DAC to inherently match chrominance and luminance timing. This ensures accurate SCH phasing. With the TSG-271's simple front panel controls you can select the following test signals:

• Color bars
• Color bars over red
• Pluge
• Convergence
• White window
• Grey window
• Ramp
• Modulated ramp
• Staircase
• Modulated staircase
• Pulse and bar with window
• Field squarewave
• Multipulse
• Multiburst
• Line sweep
• (Sin x)/x
• Flat fields
• Red field
• ITS (CCIR, EBU, UK)
• APL level

Both 100% and 75% color bars over red are provided with a narrow blanking white flag to help verify proper blanking width throughout the system. Color bar signals are also available with normal blanking width.

Composite video outputs, both test signal and black burst, include a white pulse inserted on line 7 of field 1 for color-frame identification.

The ITS signals are available as full field signals and in the field blanking interval.

The TSG-271 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-271 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 reference signal. The TSG-271 automatically senses composite video reference input and, in the absence of a reference input signal, automatically switches to its own internal reference. With its constant temperature oven, this high stability crystal oscillator ensures long term frequency stability.

Front panel controls allow phasing of all outputs relative to the genlock source. In addition, a separate set of timing controls move the pulse outputs relative to the black burst and test signal outputs. This simplifies system timing and eliminates delay lines. All timing settings are stored in nonvolatile memory to prevent loss in the event of a power failure. A front panel lockout feature prevents inadvertent changes to the front panel timing controls.

Opt. 01 adds a second test signal output over which a twelve character identification may be superimposed. The identification is front panel programmable and up to three different identification presets may be stored in nonvolatile memory.

Opt. 01 also provides a tape leader countdown feature consisting of a ten to two second countdown overlaid on a color black background. The black background remains until the countdown program is terminated.

Also included in Opt. 01 is an audio tone output. Tone frequency is 500 Hz or 1 kHz (user selectable) with output level adjustable over a 0 to +8 dBu range.

Remote selection of internal/external reference, ID preset, genlock and sync timing presets, test signal and tape leader count-down is provided. Selections are made with ground closures through a rear panel connector.

The TSG-271's rugged 1.75 inch package makes it ideal for outside broadcast vans, or anywhere space is at a premium.

• Precise 12-Bit Digitally Derived Test Signals
• SCH Phase Accuracy, Guaranteed by Use of a Single DAC
• Conforms to EBU Statements D23 and D25
• Stable Internal Reference, Ideal for Master Sync Operation
• Reliable Slave Operation Through Use of Digital Genlock
• Separate Front Panel Genlock and Sync Timing Controls

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

Specifications

Luminance Amplitude Accuracy - ±1%.

Chrominance-to-luminance Gain - ±1%.

Frequency Response - ±1% to 5 MHz.

Chrominance-to-luminance Delay - <5 ns.

Group Delay - <5 ns to 5 MHz.

SCH Phase -
Jitter: < 1 ns.
Drift: < 1 ns.
Nominal: 0° ± 5°.

Output Impedance - 75 Ohm.

Return Loss - 36 dB to 5 MHz.

Color Bars - 75% and 100% Full Field;
75% and 100% Split Field; Color Bars/Red Split Field; Color Bars/Red with 11.6 µs; Blanking on White Flag.

Pluge No. 1 -
Pluge Levels: -14 mV and 14 mV.
Luminance Levels: 700 mV, 450 mV, 200 mV and 110 mV.

Pluge No. 2 -
Pluge Levels: -14 mV and 14 mV.
Luminance Levels: 700 mV and 105 mV.

Convergence - 14 Horizontal lines and
19 Vertical Lines per Field.

White Window - 700 mV on Lines 83 through 251.

Grey Window - 105 mV on Line 83 through 251.

Luminance Ramp -
Amplitude: 0 to 700 mV.
Linearity: ±1%.

Modulated Ramp -
Luminance Amplitude: 0 to 700 mV.
Linearity: ±1%.
Chrominance Amplitude: 280 mV.
Differential Gain: 0.6% Maximum.
Differential Phase: 0.3° Maximum.

5-step Staircase -
Amplitude: 700 mV.
Linearity: <1% Relative Step Matching.

Modulated 5-step Staircase -
Luminance Amplitude: 0 to 700 mV.
Linearity: <1% Relative Step Matching.
Chrominance Amplitude: 280 mV.

Pulse and Bar and Modulated Pulse -
2T Pulse HAD: 200 ns ±20 ns.
Bar Amplitude: 700 mV.
Field and Line Tilt: <0.5%.
Pulse to Bar Ratio: 1:1 ±0.5%.
Ringing: <1% Peak.
Modulated Pulse HAD: 20T.
Chrominance-to-Luminance Gain: ±1%.
Chrominance-to-Luminance Delay: <5 ns.

Field Squarewave - 700 mV on Lines 89 through 244.

Multipulse -
Amplitude: 700 mV.
HAD: 20T (1 MHz) and 10T.
Frequencies: 1.0, 2.0, 4.0, 4.8 and 5.8 MHz.

Multiburst -
White Reference Amplitude: 560 mV.
Pedestal: 350 mV.
Packets:

Line Sweep -
Amplitude: 700 mV_p-p.
Frequency Range: 200 kHz to 6 MHz.
Markers: 1.0, 2.0, 3.0, 4.0 and 5.0 MHz.

(Sin x)/x -
Bandwidth: 6 MHz.
Pedestal: 124.9 mV.
Peak: 575.1 mV.
Flat Fields - 0 mV, 350 mV, and 700 mV.

Red Field -
Luminance Pedestal: 157 mV.
Chrominance Amplitude: 663.8 mV.

ITS -
CCIR: Lines 17, 18, 330 and 331.
EBU: Lines 17, 18, 330 and 331.
UK: ITS 1 and ITS 2.
APL: 12.5% and 87.5%; sequence is 36 lines flat field and 12 lines test signal.

Subcarrier Output -
Frequency: 4.43361875 MHz.
Stability: ±1 Hz over temperature; typically less than 1 ppm per year drift after initial aging.
Amplitude: 2 V ±0.2 V.
Return Loss: 30 dB to 4.43 MHz.

Black Burst Output - Phasing: Within 2° of the test signal output.

Pulse Outputs (General Characteristics) -
Amplitude: 2 V ±0.2 V (4 V selectable).
Impedance: 75 Ohm.
Return Loss: 30 dB to 5 MHz.
Risetime: 250 ns ±25 ns.

Pulse Outputs (Signals) -
Sync: Mixed line and field.
Blanking: Mixed line and field.

Burst Flag.
PAL Pulse: H/2 squarewave; selectable polarity; factory set high for 135°.
Frame Reference: Selectable pulse or squarewave.
Pulse: Low for line 7, field 1.
Squarewave: Low for fields 1 through 4.
The Frame Reference output may be user configured to provide a second comp sync output.

Pulse Outputs (Timing Range) - Approximately 3.5 µs advance and delay relative to the test signal, black burst, and subcarrier outputs.

Genlock Input -
Configuration: 75 Ohm loop-through.
Return Loss: >40 dB to 5 MHz.
Burst Amplitude: 300 mV ±6 dB.
Sync Amplitude: 300 mV ±6 dB.
Burst Lock Range: 4.43361875 MHz ±20 Hz.

Jitter -
Color Lock: <0.4 typical.
Monochrome Lock: <10 ns.

Genlock Timing Range -
Line: Approximately 7 µs advance and delay.
Field: 1 line advance and delay.

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