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The 7837CD2 line of composite analog to serial digital video converters are dual broadcast quality video decoders. The 7837CD2-A4 and the 7837CD2-A8 versions offer four (two per decoded channel) or eight (four per decoded channel) high quality analog audio A/D converters. Advanced 3D adaptive comb filtering technology is utilized to eliminate moving artifacts introduced during the decoding process. This makes the 7837CD2 series ideal for use in applications where the signal is destined to enter compression systems. The 7837CD2 series utilizes 12 bit video ADCs for superior precision and image quality.
The 7837CD2 series is fully SNMP enabled when used in conjunction with a 7700FC frame controller card. With full SNMP capabilities, the 7837CD2 series can also be controlled by any SNMP enabled Evertz control panel like the CP-2232E, amongst others. In addition to SNMP control, the 7837CD2 series can be controlled locally used its internal On-Screen-Display capabilities.
Features
- One input BNC per channel
- 75Ω or Hi-Z input impedance (jumper configurable)
- Two SD-SDI outputs per per channel without OSD text
- One composite analog video output with OSD text for card control
- One composite analog reference input (NTSC or PAL-B) on BNC with 75Ω or Hi-Z input impedance (jumper configurable). One time base for both channels
- Video frame synchronizer
- Infinitely variable output phase (27MHz clock increments)
- Freeze modes: black, freeze
- Comprehensive on screen display for module config
The Features of the Decoding Process
- 12 bit sampling of input analog video
- Advanced 3D adaptive video decoding
- Mode for support of non-time base corrected signals
- User configurable luma detail enhancement
- User selectable noise reduction
- Chroma AGC available, if desired
- User adjustable input video processing functions: black level, gain, hue, and saturation
The Features of "-A4" and “-A8” Option
- 4 balanced analog audio inputs (two stereo pair) on 7837CD2-A4
- 8 balanced analog audio inputs (four stereo pair) on 7837CD2-A8
- High impedance inputs (user supplies termination resistors for other impedances)
- Analog audio levels are software selectable (separate controls for coarse/fine)
- Audio delay tracks video delay
- Additional audio delay up to 2.5 seconds
- Audio advance of up to 1 frame
- 2 channels (1/2 group) of audio is multiplexed onto each of the outgoing digital video signals (7837CD2-A4)
- 4 channels (one full group) of audio is multiplexed onto each of the outgoing digital video signals (7837CD2-A8)
- 2 unbalanced AES audio outputs using BNC connectors (7837CD2-A4)
- 4 unbalanced AES audio outputs using BNC connectors (7837CD2-A8)
Specifications
Analog Video Input | |
|---|---|
| Standard | NTSC, SMPTE ST 170 PAL, ITU624-4 |
| Number of Inputs | 1 per channel |
| Connector | BNC per IEC 61169-8 Annex A |
| Signal Level | 1V nominal |
| Frequency Lock Range | ±50 ppm from nominal |
| Input Level Control Range | > ±4dB |
| Black Level Control Range | > ±5IRE |
| Chroma Level Control Range | > ±20% |
| Hue Control Range | ±20° (NTSC only) |
| Input Impedance | 75Ω or High impedance (jumper selectable) |
| Return Loss | > 35dB to 5MHz |
Reference Video Input | |
|---|---|
| Standard | NTSC, SMPTE ST 170 PAL, ITU624-4 |
| Number of Inputs | 1 |
| Connector | BNC per IEC 61169-8 Annex A |
| Signal Level | 1V nominal |
| Frequency Lock Range | ±50 ppm from nominal |
| Input Impedance | 75Ω or High impedance (jumper selectable) |
| Return Loss | > 35dB to 5MHz |
Analog Monitoring Video Output | |
|---|---|
| Standard | NTSC, SMPTE ST 170 PAL, ITU624-4 |
| Number of Outputs | 1 |
| Connector | BNC per IEC 61169-8 Annex A |
| Signal Level | 1V nominal |
| Output Impedance | 75Ω |
| Return Loss | > 35dB to 5MHz |
Serial Video Output | |
|---|---|
| Standard | SMPTE ST 259-C - 525 or 625 line. |
| Number of Outputs | 4 (2 per channel) |
| Connector | BNC per IEC 61169-8 Annex A |
| Signal Level | 800mV nominal |
| DC Offset | 0V ±0.5V |
| Rise and Fall Time | 900ps nominal |
| Overshoot | < 10% of amplitude |
| Return Loss | > 15dB to 270MHz |
| Jitter | < 0.20UI (all outputs) |
| Embedded Audio | SMPTE ST 272-A |
Decoder PerformanceSDI outputs only | |
|---|---|
| Frequency Response | < ±0.1dB (100kHz to 4.2MHz) |
| Differential Gain | < ±0.5% typical |
| Differential Phase | < ±0.5° typical |
| Noise Floor | < -60dB rms (black video VBI lines, 15kHz to 5MHz) |
| C/L Gain | < ±0.5% |
| C/L Delay | < ±9ns |
| Minimum Delay | 4.5 lines |
| Maximum Delay | 1 frame +4.5 lines |
| Inter-channel crosstalk | Within noise floor measurement |
Analog Audio Input-A4 and -A8 only | |
|---|---|
| Number of Inputs | |
| 7837CD2-A4 | 4 (2 per video channel) |
| 7837CD2-A8 | 8 (4 per video channel) |
| Type | Balanced analog audio |
| Input Impedance | 20kΩ minimum (differential) |
| Sampling Frequency | 48kHz |
| Signal Level | 0dB FS => 18 or 24dBu (Software selectable) |
| Level Control Range | ±10dB |
| Frequency Response | ±0.1dB (20Hz to 20kHz) (broadcast quality) |
| SNR | 100 dB |
| THD+N | < 0.001% (> 100dB) @ 1kHz, -0.5 dB FS < 0.001% (> 100dB) @ 20Hz to 20kHz, -0.5 dB FS (input video locked to genlock video) |
| CMRR | > 90dB @ 1kHz |
AES Audio Outputs | |
|---|---|
| Number of Outputs | |
| 7837CD2-A4 | 2 (1 per channel) |
| 7837CD2-A8 | 4 (2 per channel) |
| Output Standard | SMPTE ST 276, single ended synchronous AES |
| Connectors | BNC per IEC 61169-8 Annex A |
| Resolution | 24 bits |
| Sampling Rate | synchronous 48kHz |
| Minimum I/O Delay | 2.9ms |
| Maximum I/O Delay | 2.5s |
Electrical | |
|---|---|
| Voltage | +12V DC |
| Power | |
| 7837CD2 | 17 Watts |
| 7837CD2-A4 | 21 Watt |
| 7837CD2-A8 | 21 Watts |
| EMI/RFI | Complies with FCC Part 15, Class A EU EMC directive |
Physical | |
|---|---|
| Number of Slots | |
| 7700FR-C | 2 (7837CD2) or 3 (7837CD2-A4/A8) |
| 7800FR | 1 (7837CD2) or 2 (7837CD2-A4/A8) |
Ordering Information
| 7837CD2 | Dual Composite Decoder |
|---|---|
| 7837CD2-A4 | Dual Composite Decoder with 4 analog inputs |
| 7837CD2-A8 | Dual Composite Decoder with 8 analog inputs |
Ordering Options | |
|---|---|
| Notes | • Rear plate must be specified at time of order - eg: [model]+3RU |
| Rear Plate Suffix | |
|---|---|
| +3RU | 3RU rear plate for use with 7700FR-C, 7800FR, 7800FR-QT or 7801FR Multiframes |
Enclosures | |
|---|---|
| 7700FR-C | 3RU Multiframe which holds 15 single slot modules |
| 7800FR | 3RU Multiframe which holds 15 single slot modules |
| 7800FR-QT | 3RU Quiet Multiframe which holds 15 single slot modules |
| 7801FR | 1RU Multiframe which holds up to 4 single slot or 2 dual slot modules |