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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

Specifications

Analog 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 Level Control Range > ±4dB
Black Level Control Range > ±5 IRE
Chroma Level Control Range > ±20%
Hue Control Range > ±20° (NTSC only)
Input Impedance 75Ω or High impedance (jumper selectable)
Return Loss > 35dB to 5MHz

Serial Video Input

Standard SMPTE ST 259-C- 525 or 625 line
Number of Inputs 1 (non-reclocked)
Connector BNC per IEC 61169-8 Annex A
Return Loss > 15dB to 300MHz
Embedded Audio SMPTE ST 272-A
Frequency Lock Range ±50ppm from nominal

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 ±50ppm 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
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 Performance

SDI 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

Analog Audio Input

-A4 only
Number of Inputs 4
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 100dB
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 Outputs 2
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 4.5 lines
Maximum I/O Delay 2.5s

Electrical

Voltage +12V DC
Power
7837CDM 17 watts
7837CDM-A4 21 watts
EMI/RFI Complies with FCC Part 15, Class A, EU EMC directive

Physical

Number of Slots
7700FR-C 2
7800FR 1 (7837CDM) or 2 (7837CDM-A4)

Ordering Information

7837CDM Composite Analog Video A to D Converter with Frame Synchronizer
7837CDM‑A4 Composite Analog Video A to D Converter with Frame Synchronizer with 4 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 4 single slot modules