Video Sync Generator - Brainstorm Electronics
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1. Sosa eden eo eae aes eats lo he oats aes wate 8 1 Introduction The VSG 4 generates analog tri level and bi level sync signals for HD and SD video appli cations Up to 4 different sync formats can be generated simultaneously through it s 4 BNC outputs 2 HD and 2 SD The VSG 4 operates either as a master clock generator or gen locked to any of the references available to the DCD 8 Designed as an option for the Brainstorm DCD 8 Word Clock Distripalyzer the VSG 4 combined with the DCD 8 delivers a complete solution for all sync requirements in the post production recording and broadcast environments 2 Installation 2 1 UNPACKING When unpacking the VSG 4 the following items should be in the shipping carton e VSG 4 board e 3 screws e 1 34 pin interconnect cable e Owners Manual amp Registration card 2 2 INSTALLING THE VSG 4 The VSG 4 is a 2 x 5 4 circuit board designed to be installed inside the DCD 8 Installation should be performed carefully using usual precautions 1 Turn off DCD 8 by unplugging the power cord 2 Remove the top panel screws and remove the top panel 3 Inside the chassis locate the area for the VSG 4 left of the mother board behind the front panel BNC 4 Remove the hole covers for the 4 BNC connectors on the rear panel 5 On the mother board side unplug the ribbon cable connecting the front panel BNC s so it is out of the way VSG 4 Operations Manual Page 3 6 Feed the 4 BNC2. connectors on the VSG 4 into the 4 rear panel BNC holes and slide the VSG 4 PCB on top of the 3 stand offs You ll need to angle the PCB appro priately to find its way into proper position 7 Secure the PCB in place with the 3 screws provided 8 Reconnect the front panel BNC s into the mother board 9 Connect the VSG 4 to the mother board using the 34 pin cable provided This cable needs to be folded twice as shown on the illustration below CAUTION Be absolutely certain pin 1 is in the right place on both ends of the cable before powering on Failure to do so will cause damage to the unit REAR FRONT 2 3 POWER ON Once the VSG 4 is installed properly power on the DCD 8 The front panel LED s located on the far right under VID SYNC GEN should light up indicating the cur rent selection 3 Connecting the VSG 4 The VSG 4 has 4 BNC output connectors Two of those are for HD Sync the other two for SD They are labeled as such on the rear panel HD1 HD2 SD1 SD2 Use standard 75Q video cables on those outputs 3 1 DAISY CHAINING SD On the SD outputs if absolutely necessary it is acceptable to daisy chain multi ple devices on a single connector However make sure that the last one in the chain and only the last one has a 75Q termination HD On the HD outputs do not daisy chain Connect only 1 device per output and make sure it is properly terminated 75Q Page 4 VSG 4 Opera
3. 3 For the SD outputs call up menu 54 7 Specifications Number ofouipus 4 2 2 O Standards 720 Output levels All rise and fall times per their respective standards 2 x 5 4 PCB option for Brainstorm DCD 8 only BRAINSTORM ELECTRONICS INC www brainstormtime com Distributed Exclusively by plus24 1155 N La Brea Avenue West Hollywood CA 90038 USA Tel 323 845 1171 Fax 323 845 1170 www plus24 net
4. 38 al Ooo ss Sa a a a E 11 988Hz Output Hz values for edge coincidence are given where not every video output frame edge aligns to a corresponding reference edge 5 994Hz 5 4 COLOR FRAMING The DCD 8 video path does not support color framing so when for example an NTSC Video Output is genlocked to an NTSC Video Input the color framing sequence will not necessarily be reproduced The same applies to PAL When the SD Video Reference is set to match the video output s NTSC to NTSC PAL to PAL the following warning message will be displayed for a couple of seconds on the LCD display Video Option No Color Framing Servo Page 8 VSG 4 Operations Manual 6 Front panel LED s BESO a DARTS oe a wu e i e EH E Ek Eiki timi we ti f C b nE There are ten LED s on the front panel related to the VSG 4 They indicate the formats currently selected for the 4 VSG 4 outputs For HD there are 6 LED s 3 per output They indicate the selected frame rate 29 97 left LED only 30 left amp center LED s 25 center LED only 24 center amp right LED 23 976 right LED only For SD there are 4 LED s 2 per output They indicate the selected format NTSC left LED PAL right LED These LED s also indicate the Lock status by flashing when the corresponding output is unsynchronized For complete format and rate information on the HD outputs call up menu 5
5. V3G 4 Video Sync Generator For the Brainstorm DCD 8 Operations Manual Software version 2 00 1 N S BRAINSTORM 4 ELECTRONICS INC Intelligent Solutions For The Recording Studio VSG 4 Video Sync Generator for the DCD 8 Operations manual Version 2 00 June 2007 All materials herein Brainstorm Electronics Inc Brainstorm Electronics reserves the right to change or modify the contents of this manual at any time Credits Concept AID Brainstorm Electronics Software Gerry Lester Manual Bernard Frings Gerry Lester Technical Assistance Jeff Evans Jim Pace Brainstorm Electronics Inc 5100 Goldleaf Circle 215 Los Angeles CA 90056 USA Tel 1 323 845 1171 www brainstormtime com Page 2 VSG 4 Operations Manual Table of contents TAINTRODUGTIONR 62 46 vies eek attic bate toes beak BA atk Oe tes tk Bete a 2 ZOINSTALLATION A T eke akana ects ee et ek eT ek teak At Bl id 2 3 CONNECTING THE VSG 400 4 cece eee ewe ee eww eee eee eee ea eee es 3 A MENUS DESCRIPTION X sepias aie ee o a ees ae sis HSER SEA EE wee 4 51 Video Option esses oS Patiry Site acter aie rated Ae corey Maes 4 O24 Vide Out Ref repiter i o EEEE E A E LOTE EE a 4 SIAD Out i ae Saa nt a Ae ede A eect a aea a Cooly 5 5A SD Out eo r a As ish A an wes ede EE O ES 5 5 NOTES ON GENLOCKING sa oe e sa n e EE a E E EE een E E E 6 6 FRONT PANEL LEDS 2 4 6 osc oc oe At ed E T r E etait oe 8 7 QPEGIFICATIONS nerc wees ees a
6. ave a different format and rate Selections available are 525i 29 97 NTSC 525i 30 monochrome 625i 23 976 slow PAL 625i 24 slow PAL 625i 25 PAL Page 6 VSG 4 Operations Manual 5 Notes on genlocking 5 1 FORMS OF GENLOCK There are three forms of genlock 1 INTER OUTPUT SYNC Output formats are divided into two groups pulldown and non pulldown and within each group the relationship between the output frame edges is fixed In the non pulldown group frame edges for video rates of 30 25 24 60 and 50 Hz will all be coincident once per second 1Hz and the 30 24 60 rates will be further coincident at a 6Hz rate The pulldown group 29 97 23 976 59 94 is similarly synchronized 2 SYNC TO VIDEO INPUT When the Video Output Reference Menu 52 and Menu 02 REF A if Menu 52 is set to Use REF A is set for Video the Video Output waveforms will be tightly synchronized to the Video Input waveform Note however that edge synchronization will not cross the pulldown non pulldown bar rier in other words a non pulldown output will not edge align with a pulldown input although its long term rate will be derived from that input 3 SYNC TO WORDCLOCK RATE A OUTPUT When the Video Output Reference is set to anything other than Video then the Video Output waveforms will be correctly aligned with the DCD 8 RATE A Output waveforms i e wordclock rising edge coincident with vid
7. e REF B menu and sets up a separate reference for all Video Outputs HD and SD When Use REF A is selected the video and the audio share a common reference the one selected in menu 02 As with menu 22 REF B when necessary the Video Reference can be different than the REF A Any of the available inputs can be selected There are 2 choices for VSG 4 Operations Manual Page 5 the rate of the reference SET or LEARN for more information see chapter 11 in the DCD 8 manual BRITT ii a CAUTION When selecting a separate reference for the video output i e different than Use REF A the audio and video outputs may not have the same reference 4 3 MENU 53 HD OUT bu bales al mere m Boo riL L Menu 53 sets the HD Video output formats and rates Each of the 2 HD outputs are set individually and can have a different format and rate Selections available are 720p 23 976 1080i 25 1080p 23 976 720p 24 1080i 25 295M 1080p 24 720p 25 1080i 29 97 1080p 25 720p 29 97 1080i 30 1080p 29 97 720p 30 1080sF 23 976 1080p 30 720p 50 1080sF 24 1080p 50 720p 59 94 1080sF 25 1080p 50 295M 720p 60 1080sF 29 97 1080p 59 94 1080sF 30 1080p 60 p stands for Progressive i stands for Interlaced sF stands for Segmented Frame 295M stands for SMPTE standard 295M 4 4 MENU 54 SD OUT Menu 54 sets the SD Video output formats and rates Each of the 2 SD outputs are set individually and can h
8. eo start of line 1 under the following cir cumstances a Non pulldown video outputs will edge align to RATE A rates of 48000 44100 32000 and their multiples b Pulldown video outputs will edge align to RATE A rates of 48000 47952 44056 and their multiples c REF A Menu 02 and the Video Output Reference Menu 52 must be identically set This is most easily achieved by setting Menu 52 to Use REF A 5 2 EDGE COINCIDENCE BETWEEN DIFFERENT FRAME RATES The following illustration shows the relationship between 24 25 and 30f s a 1 Second gt 6 Hz l i l 24 Fr rei en a A CC RC 25 Fr ae a a ae a 5 Hz i i i i i i With 24 and 30 f s edge coincidence occurs 6 times per second 6 Hz with 25 and 30 it occurs 5 times per second 5Hz with 24 and 25 it occurs 1 time per second 1 Hz A similar relationship exists for the pulldown rates 23 amp 29 with a frequency of 5 994Hz VSG 4 Operations Manual Page 7 5 3 EDGE ALIGNMENT GENLOCK COMBINATIONS The following table indicates when input to output edge alignment will occur Note that all video outputs are rate locked at all times even when not edge aligned Video Output Types and Rates Slow PAL Slow PAL 2 NTSC 23 976 M Coa wrr mam _ a i a D a S S E EE aa Camar I ao assa ao Moek 45983 4
9. tions Manual 4 Menus Description 4 1 MENU 51 VID OUT HD 1 amp 2 The VSG 4 provides stable HD clock rates over long periods of time by making use of the DCD 8 s B Domain PLL Which means that with HD enabled the DCD 8 no longer has access to Domain B for word clock With SD only enabled the VSG 4 uses Domain A and both domains are available for word clocks However Domain A cannot be VSO d Therefore the VSG 4 gives you 3 choices for the Video Outputs in menu 51 Enable HD amp SD Enable SD only Disable Here is what happens under each circumstances ENABLE HD amp SD the HD and SD outputs are active Domain B is used by the VSG 4 and is thus unavailable for audio use the HD and SD outputs are referenced as selected in Menu 52 Menu 21 RATE B will show Using Rate A Menu 22 REF B will be skipped ENABLE SD ONLY the HD output connectors are grounded the SD outputs are active and are referenced to REF A Menus 52 amp 53 will be skipped Domains A amp B are available for audio use Menu 2 REF A does not offer the VSO option DISABLE the HD and SD output connectors are grounded Menus 52 53 amp 54 will be skipped No restrictions on the DCD 8 Domains A amp B are available for word clocks and can both be VSO d 4 2 MENU 52 VIDEO OUT REF This menu is only available when HD amp SD Video have been enabled in menu 51 Menu 52 operates in the same way as th
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