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VSG-4 VIDEO SYNC GENERATOR CARD
for DCD-8

 

VSG-4 Video Sync Generator Card

Low jitter HD and SD video sync card for the DCD-8

The VSG-4 generates analog tri-level and bi-level sync signals for HD and SD video applications. It is designed as an option for the Brainstorm DCD-8 Word Clock Distripalyzer.

Note: The DCD-8 is now discontinued.

Brainstorm DCD-8

Features

  • Generates NTSC, PAL and HD tri-level sync
  • Generates up to 4 different formats simultaneously (2 HD + 2 SD)
  • Genlocks to any of the DCD-8 references:
    • HD or SD video
    • Word Clock
    • Audio (AES/EBU, S/PDIF, FireWire, ADAT)
    • GPS
  • Can also operate as a Master Sync Generator
  • Very Low-Jitter Video Sync output
  • Comprehensive choice of rates and formats (31 different options)
  • Easy installation into the DCD-8
Brainstorm VSG-4
The VSG-4 generates analog tri-level and bi-level sync signals for HD and SD video applications. It is designed as an option for the Brainstorm DCD-8 Word Clock Distripalyzer. The combination of the DCD-8 and the VSG-4 delivers a complete solution for all sync requirements in the post-production, recording and broadcast environments.
 
Up to 4 different sync formats can be generated simultaneously through the 4 BNC outputs, 2 HD and 2 SD. The VSG-4 operates either as a master sync generator or genlocked to any of the references available to the DCD-8: Video (HD or SD), Word Clock, Digital Audio (AES/EBU, S/PDIF, FireWire, ADAT) or GPS.
When genlocking, the output rates can be different from the reference rate, while still maintaining phase coherence. For example, 30 and 24 or 23.976 and 29.97 will be correctly aligned.
 
By making use of the DCD-8’s B Domain PLL, the VSG-4 provides stable HD clock rates over long periods of time.
The VSG-4/DCD-8 combination brings a great amount of flexibility. Audio can be locked to video or vice-versa. Many different rates can be generated simultaneously. Most importantly, a single sync reference can run your whole audio/video installation.
VSG-4 Rear DCD-8 Panel

HD Output Formats

  • 720p / 23.976
  • 720p / 24
  • 720p / 25
  • 720p / 29.97
  • 720p / 30
  • 720p / 50
  • 720p / 59.94
  • 720p / 60
  • 1080i / 25
  • 1080i / 25 (295M)
  • 1080i / 29.97
  • 1080i / 30
  • 1080sF / 23.976
  • 1080sF / 24
  • 1080sF / 25
  • 1080sF / 29.97
  • 1080sF / 30
  • 1080p / 23.976
  • 1080p / 24
  • 1080p / 25
  • 1080p / 29.97
  • 1080p / 30
  • 1080p / 50
  • 1080p / 50 (295M)
  • 1080p / 59.94
  • 1080p / 60

p stands for Progressive; i stands for Interlaced; sF stands for Segmented Frame

SD Output Formats

  • 525i / 29.97 NTSC
  • 525i / 30 monochrome
  • 625i / 23.976 slow PAL
  • 625i / 24 slow PAL
  • 625i / 25 PAL

TGC Specifications

Number of Outputs: 4 (2 SD + 2 HD)
Standard 1080 – SMPTE 274M, RP211, 295M
720 – SMPTE 296M
NTSC – RS170A
PAL – Rec ITU-R BT.470-6
Output Levels Tri-Level – 600mV p-p into 75 Ohm (+/-300mVDC sync tip)
NTSC – 429mV p-p into 75 Ohm (-286mVDC sync tip)
PAL – 450mV p-p into 75 Ohm (-300mVDC sync tip)
Waveforms: All rise and fall times per their respective standards
References: Internal Xtl, Video (HD & SD), WC, AES, S/PDIF, FireWire, ADAT, GPS
Connectors: BNC – 75 Ohm – DC coupled
Form Factor: 2” x 5.4” PCB – for Brainstorm DCD-8 only
DCD-8 Domain: When generating HD sync, the VSG-4 uses the B Domain on the DCD-8

VSG-4 Resources

Manual & Data Sheet

Owners Manual - VSG-4 rev. 2 - PDF
VSG-4 Data Sheet - PDF

FAQs

Can the VSG-4 generate several Video Sync rates and formats simultaneously?

Yes. The VSG-4 can generate up to four different formats and rates at the same time, one for each output. Menu 53 sets the format of the 2 HD Video outputs; menu 54 sets the format of the 2 SD Video outputs.

How can I see which format and rate is sent to which output?

The DCD-8 front panel includes 10 LED’s for the VID SYNC GEN. However, that is not enough to describe all the 31 different formats. The 6 HD LED’s only indicate the frame rate; the 4 SD LED’s indicate the SD format. For complete format and rate information on the HD outputs, call up menu 53 on the LCD display; for the SD outputs, call up menu 54.