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Description: The SPG170A sync generator offers all the features expected in a sync generator, plus the advantages of digital accuracy and system flexibility. Ideal for either master or slave generator operation, the SPG170A features stable performance and a rugged 1.75 in. package. The SPG170A Option 1 provides even more versatility by adding SMPTE color bars with programmable identification and audio tone.
All SPG170A signals are digitally generated to provide excellent SCH and timing accuracy. The SPG170A also has a digital genlock to ensure consistent color framing and to eliminate timing drift inherent in other genlock systems. This microprocessor-based system calculates genlock input burst phase and sync timing to control output timing and color framing. All outputs are correctly SCH phased, even if the SPG170A is locked to an improperly SCH phased input. When no input signal is present, it switches to an internal oscillator. This high stability crystal oscillator, enclosed in a constant temperature oven, ensures long term frequency accuracy and stability.
The flexibility of the SPG170A's pulse outputs allows you to configure it to your specific system needs. The SPG170A has eight sync generator outputs: SYNC, SUBCARRIER, BLANKING, BLACK BURST and four selectable outputs. The selectable outputs can be used for BURST FLAG, H DRIVE V DRIVE and COLOR FRAME PULSE, or they can be used to provide an additional set of outputs for the pulses most commonly used in modern television facilities. Horizontal blanking can be set to 10.5, 10.7 or 10.9 µs and vertical blanking can be set to either 19 or 20 lines.
By specifying Option 1, basic video and audio test capabilities are added to the SPG170A. Option 1 includes SMPTE color bars and audio tone generators for setting program levels. Also, a preset ID of up to 12 characters can be added over the SMPTE color bar output. This ID is stored in nonvolatile memory from the front panel, and up to four preset IDs can be recalled through the remote control. Additionally, the remote control allows the ID to be replaced by a countdown, providing a tape leader function. The vertically locked 450 Hz audio tone provides a unique method for checking audio edit quality. The audio tone can be combined with a variable rate click to distinguish various audio sources.
This system has the following features:
Digitally Generated Black Burst
Digital Genlock
High Stability Internal Reference
Configurable Pulse Outputs
Pulse Timing Independent of Black
Four Character ID Presets
Eight Genlock and Sync Timing Presets
Remote Control
Optional SMPTE Color Bars, ID and Audio Tone
This system has the following specifications:
Test Signal and Black Burst Generator
Luminance Amplitude Accuracy - ±1%.
Chrominance-to-luminance Gain - ±1%.
Output Impedance - 75 Ohm.
Return Loss - 30 dB to 4.2 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.
Sync Generator
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: 10.7 µs.
Pulse Outputs (General Characteristics)
Amplitude: 4.0 ±0.2 V.
Impedance: 75 Ohm.
Return Loss: 30 dB to 4.2 MHz.
Rise Time: 140 ns ±20 ns.
Pulse Outputs (Signals)
Composite Sync.
Blanking: 10.7 µs ±0.1 µs.
Horizontal Blanking Duration: jumper selectable for 10.5 µs or 10.9 µs.
Burst Flag.
Horizontal Drive.
Vertical Drive.
Color Frame Pulse: field 1, line 11.
Subcarrier Output - Amplitude: 2 Vp-p ±0.2 V.
Sync Timing Range - 4 µs advance, 4 µs delay.
Genlock
Genlock Source (Comp Video)
Input Configuration: 75 Ohm loopthrough.
Return Loss: at least 40 dB to 4.2 MHz.
Burst Amplitude: 286 mV +1 to -6 dB.
Sync Amplitude: 286 mV +3 to -6 dB.
Genlock Performance
Horizontal Timing Range: 8 µs advance, 8 µs delay.
Vertical Timing Range: 0, 1, or 2 lines advance or 1 line delay, jumper selectable.
Burst Lock Range: 3.579545 MHz ±20 Hz.
Jitter: 0.5° maximum.
This system has no options installed.
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