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7837CDM, 7837CDM-A4

Composite Analog Video A to D Converter with Frame Synchronizer

Product ManualManual
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The 7837CDM line of composite analog to serial digital converters are broadcast quality decoders with an extensive list of features. High quality analog audio A/D converters can be packaged with the decoder to create a video/audio frame synchronizer with audio embedding.

Within the 7837CDM series, adaptive 3D comb filtering technology is utilized to eliminate moving artifacts typically introduced during the decoding process. This makes the 7837CDM series ideal for use in applications where the signal is destined to enter compression systems. The 7837CDM series utilizes 12 bit video ADCs for superior precision and image quality.

The 7837CDM series is fully SNMP enabled when used in conjunction with a 7700FC frame controller card. With full SNMP capabilities, the 7837CDM series can also be controlled by any SNMP enabled Evertz control panel like the CP-2232E, amongst others. In addition to SNMP control, the 7837CDM series can be controlled locally used its internal On-Screen-Display capabilities.

Features
  • One input analog video input
  • One SMPTE ST 259-C video input
  • 75Ω or Hi-Z input impedance (jumper configurable)
  • Four SD-SDI outputs 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
  • 75Ω or Hi-Z input impedance (jumper configurable) for REF IN
  • 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" Option
  • 4 balanced analog audio inputs (two stereo pair) on 7837CDM-A4
  • 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 2.5s
  • Audio advance of up to 1 frame
  • 4 channels (one full group) of audio is multiplexed onto outgoing video
  • 2 unbalanced AES audio outputs using BNC connectors
Block DiagramBlock Diagram

Specifications

Analog Video Input
StandardNTSC, SMPTE ST 170 PAL, ITU624-4
Number of Inputs1
ConnectorBNC per IEC 61169-8 Annex A
Signal Level1V nominal
Frequency Lock Range±50 ppm from nominal
Input Level Control Range> ±4dB
Black Level Control Range> ±5 IRE
Chroma Level Control Range> ±20%
Hue Control Range> ±20° (NTSC only)
Input Impedance75Ω or High impedance (jumper selectable)
Return Loss> 35dB to 5MHz
Serial Video Input
StandardSMPTE ST 259-C- 525 or 625 line
Number of Inputs1 (non-reclocked)
ConnectorBNC per IEC 61169-8 Annex A
Return Loss> 15dB to 300MHz
Embedded AudioSMPTE ST 272-A
Frequency Lock Range±50ppm from nominal
Reference Video Input
StandardNTSC, SMPTE ST 170 PAL, ITU624-4
Number of Inputs1
ConnectorBNC per IEC 61169-8 Annex A
Signal Level1V nominal
Frequency Lock Range±50ppm from nominal
Input Impedance75Ω or High impedance (jumper selectable)
Return Loss> 35dB to 5MHz
Analog Monitoring Video Output
StandardNTSC, SMPTE ST 170 PAL, ITU624-4
Number of Outputs1
ConnectorBNC per IEC 61169-8 Annex A
Signal Level1V nominal
Output Impedance75Ω
Return Loss> 35dB to 5MHz
Serial Video Output
StandardSMPTE ST 259-C - 525 or 625 line
Number of Outputs4
ConnectorBNC per IEC 61169-8 Annex A
Signal Level800mV nominal
DC Offset0V ±0.5V
Rise and Fall Time900ps nominal
Overshoot< 10% of amplitude
Return Loss> 15dB to 270MHz
Jitter< 0.20UI (all outputs)
Embedded AudioSMPTE 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 Delay4.5 lines
Maximum Delay1 frame + 4.5 lines
Analog Audio Input-A4 only
Number of Inputs4
TypeBalanced analog audio
Input Impedance20kΩ minimum (differential)
Sampling Frequency48kHz
Signal Level0dB FS => 18 or 24dBu (Software selectable)
Level Control Range±10dB
Frequency Response±0.1dB (20Hz to 20kHz) (broadcast quality)
SNR100dB
THD+N< 0.001% (> 100dB) @ 1kHz, -0.5dB FS
< 0.001% (> 100dB) @ 20Hz to 20kHz, -0.5 dB FS (input video locked to genlock video)
CMRR> 90dB @ 1kHz
AES Audio Outputs-A4 only
Number of Outputs2
Output StandardSMPTE ST 276, single ended synchronous AES
ConnectorsBNC per IEC 61169-8 Annex A
Resolution24 bits
Sampling RateSynchronous 48kHz
Minimum I/O Delay4.5 lines
Maximum I/O Delay2.5s
Electrical
Voltage+12V DC
Power
7837CDM17 watts
7837CDM-A421 watts
EMI/RFIComplies with FCC Part 15, Class A, EU EMC directive
Physical
Number of Slots
7700FR-C2
7800FR1 (7837CDM) or 2 (7837CDM-A4)

Ordering Information

7837CDMComposite Analog Video A to D Converter with Frame Synchronizer
7837CDM-A4Composite Analog Video A to D Converter with Frame Synchronizer with 4 analog inputs
Ordering Options
NotesRear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+3RU3RU rear plate for use with 7700FR-C, 7800FR, 7800FR-QT or 7801FR Multiframes
Enclosures
7700FR-C3RU Multiframe which holds 15 single slot modules
7800FR3RU Multiframe which holds 15 single slot modules
7800FR-QT3RU Quiet Multiframe which holds 15 single slot modules
7801FR1RU Multiframe which holds 4 single slot modules