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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.

特点

  • 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)

指标|

Analog Video Input

标准 NTSC, SMPTE ST 170 PAL, ITU624-4
输入数量 1 per channel
端口数目 BNC per IEC 61169-8 Annex A
信号电平 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)
反射损失 > 35dB to 5MHz

Reference Video Input

标准 NTSC, SMPTE ST 170 PAL, ITU624-4
输入数量 1
端口数目 BNC per IEC 61169-8 Annex A
信号电平 1V nominal
Frequency Lock Range ±50 ppm from nominal
Input Impedance 75Ω or High impedance (jumper selectable)
反射损失 > 35dB to 5MHz

Analog Monitoring Video Output

标准 NTSC, SMPTE ST 170 PAL, ITU624-4
输出数量 1
端口数目 BNC per IEC 61169-8 Annex A
信号电平 1V nominal
Output Impedance 75Ω
反射损失 > 35dB to 5MHz

串行视频输出

标准 SMPTE ST 259-C - 525 or 625 line.
输出数量 4 (2 per channel)
端口数目 BNC per IEC 61169-8 Annex A
信号电平 800mV nominal
直流偏置 0V ±0.5V
上升/下降时间 900ps nominal
过冲 < 10% of amplitude
反射损失 > 15dB to 270MHz
抖动 < 0.20UI (all outputs)
Embedded Audio SMPTE ST 272-A

Decoder Performance

SDI outputs only
频率响应 < ±0.1dB (100kHz to 4.2MHz)
微分增益 < ±0.5% typical
微分相位 < ±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
输入数量
7837CD2-A4 4 (2 per video channel)
7837CD2-A8 8 (4 per video channel)
Type 平衡 analog audio
Input Impedance 20kΩ minimum (differential)
Sampling Frequency 48kHz
信号电平 0dB FS => 18 or 24dBu (Software selectable)
Level Control Range ±10dB
频率响应 ±0.1dB (20Hz to 20kHz) (broadcast quality)
信噪比 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)
共模抑制比 > 90dB @ 1kHz

AES Audio Outputs

输出数量
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

电气

电压 +12V DC
功率
7837CD2 17 瓦
7837CD2-A4 21 Watt
7837CD2-A8 21 瓦
EMI/RFI Complies with FCC Part 15, Class A
EU EMC directive

物理参数

插槽数
7700FR-C 2 (7837CD2) or 3 (7837CD2-A4/A8)
7800FR 1 (7837CD2) or 2 (7837CD2-A4/A8)

订购信息|

7837CD2 Dual Composite Decoder
7837CD2‑A4 Dual Composite Decoder with 4 analog inputs
7837CD2‑A8 Dual Composite Decoder with 8 analog inputs

订购可选项

注意 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