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Advanced NTSC Color Encoder Model ENC7a
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| [Special Order Only] |
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Description
The ENC7A Advanced NTSC Color Encoder is a state of the art professional encoder.
It achieves significant picture quality improvement over conventional NTSC encoders by
utilizing patented techniques.*
The encoder uses improved antialias filters for luminance and chrominance to help reduce
interline flicker and cross-luminance cross-color defects. They are particularly
useful with computer generated images not utilizing antialiased processes. Also highly
desirable with Telecines and CCD cameras.
The encoder features exclusive vertical enhancement and flicker reduction circuits to
reduce interline flicker, particularly useful with computer graphics
Color modulation is done digitally without the use of multipliers, for essentially perfect
linearity and perfect quadrature. Exclusive proprietary techniques are employed in the
modulator to completely suppress residual color subcarrier and thus achieve, from a
practical point of view, perfect modular balance. A D2 digital output is optional.
Advanced fabrication techniques contribute to make the price of this Advanced Encoder
extremely competitive.
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Digital Color Modulation
All Digital Modulation without the use of multipliers, with digital feedback and dynamic
digital processes to completely suppress residual color subcarrier in monochromatic
areas and guarantee perfect quadrature modulation.
Digital Antialiased Filters
Dynamically adaptive luminance comb filter and patented three line comb filtering for
chrominance, designed to reduce interline flicker and cross luminance cross chrominance defects.
Vertical Enhancement/De-Enhancement
Patented variable vertical aperture compensation/vertical filtering, permits de-emphasizing
vertical transitions to reduce interline flicker.
Internal or External Reference
Will lock to external reference or output internally generated sync.
Optional D2 Output
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| Front Panel Controls |
| Power |
On/Off |
| Chrominance Level |
0 to 120% |
| Vertical Enhancement/De-Enhancement |
-20 dB to +6 dB |
| Vertical Details |
On/Off |
| Composite Video Level |
120 to 160 IRE Units |
| Sync Level |
0 to 60 IRE Units |
| Pedestal |
0 to 20 IRE Units |
| Sync Delay |
± 1 µs |
| Burst Delay |
± 10º |
| Subcarrier Phase |
0 to 360º |
| Chroma |
On/Off |
| Chroma Comb Filter |
On/Off |
| Specifications: |
| Inputs: |
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| RGB |
700 mV into 75 Ohms |
| or Y, R-Y, B-Y |
Levels as requested
Return loss greater than 36 dB |
| Black Burst |
500 mV into 75 Ohms |
| Outputs: |
Two composite NTSC Color signals, 1v into 75 Ohms
Reference Sync
Optional D2 output |
| Video Specifications: |
| Frequency Response: |
| Luminance |
± 15 dB to 5 MHz, useable response to 6.5 MHz |
| I & Q Channels |
< 3 dB down at 1.2 MHz
> 20 dB down at 3.6 MHz |
| Optional for Q Channel |
< 3 dB down at 400 kHz
> 6 dB down at 600 kHz |
| Non-Linearity |
< 2% plus quantizing effect |
| Differential Phase |
< 2º plus quantizing effect |
| K Factor with 2T Pulse |
Better than 1% |
| Frame Tilt |
Less than 1% |
| Y to Chroma relative timing |
± 25 ns |
| Modulator Balance |
Essentially infinite - no residual color subcarrier |
| Y to Sync timing |
Adjustable ± 1 µs |
| Subcarrier phase |
Adjustable over 360º |
| Sync level |
Adjustable 0 to 60 IRE units |
| Pedestal level |
Adjustable 0 to 20 IRE units |
| Input to Output delay |
1 TV line plus 1.2 µs, nominal |
| Environmental: |
| Temperature: |
40º F to 105º F, Ambient |
| Humidity: |
10% to 90% non-condensing |
| Mechanical: |
| Height: |
1.75" |
| Width: |
19" |
| Length: |
14.5" |
| Weight: |
9 lbs. |
| Power: |
115 volts AC, 50/60 Hz, 30 Watts |
| * Patent No. 4,849,808 Specification subject to change without notice. |
