DAFV² User Manual
Contents
1. machine number 0 through 3 21 Rear Panel DIP Switches 1 4 select the protocol for each type of mixer Yamaha 02R for 02R96 see below n n for Channel 17 32 operation Yamaha DM1000 DM2000 02R96 n OW datant Off SW2 saret Off SWB sth ius On Switch 4 On for 24 frame HDTV Applications Off for all other applications Switches 5 and 6 are resetved for future use 22 Selecting Mono Stereo Quad Operation Mode The DIP switches on the DAFV sets three options for its operations Mono stereo quad operation and model of mixer DIP switches 7 and 8 are used to select the operation mode Mono SWT oe Off SWB ama Off Stereo SWT xaseeennens On SWB a Off Quad SWT renine Off SWB esee On No Function SWT ann On SWB ated On Troubleshooting If the DAFV does not give the expected results take some time to do some trouble shooting Confirm the DIP switch settings Check that the cables are correctly wired and connected Check that power is connected and the DAFV is switched on indicated by the LED next to the power switch If you are unable to make the edit controller communicate with the DAFV review the edit controller s documentation to verify that any user definable menu items have been set correctly If you are still experiencing any difficulties please refer to the fine print following regarding warranty and service information 23 LCooper Electronics Limited Factory W2. 1 Ground Pin 6 Ground Pin 2 Output Pin 7 Output Pin 3 Input Pin 8 Input Pin 4 Ground Pin 9 Ground Pin 5 no connection DAFV can be used in an eavesdrop mode that is connected to a video switcher output via a y cord If this is done a cable with pins 2 and 7 disconnected will be needed to prevent DAFV s tallybacks from interfering with the video switcher s tallybacks ESAM Protocol Note All numberrs in bex When the DAFV is first turned on it is in an idle state In order to select the unit the following bytes must be sent break 88 A6 03 This string should only be sent once to select the DAFV After this normal commands may be sent The following are the commands recognized by the DAFV a Transition Command 03 01 A9 CO Upon receipt of this string the DAFV will send back an 80 as acknowledgment and will start a transition at the currently active transition rate b Transition Rate Command 04 01 A7 00 rr Upon receipt of this string the DAFV will send back an 80 as acknowledgment and will store rr as the transition rate in frames 20 c All Stop Command 02 01 A0 Upon receipt of this string the DAFV will send back a n 80 as acknowledgment and stop any current transition in progress and return to previous state Program Crosspoint Command 03 01 B4 nn pon receipt of this string the DAFV will send back an 80 as acknowledgment and will use nn to se
3. AY IN PERFORMANCE OF THIS WARRANTY THE LOSS OF USE OF THE PRODUCT OR COMMERCIAL LOSS AND FOR BREACH OF ANY EXPRESS OR IMPLIED WAR RANTY OF MERCHANTABILITY APPLICABLE TO THIS PRODUCT JLCOOPER SHALL NOT BE LIABLE FOR DAMAGES OR LOSS RESULTING FROM THE NEGLIGENT OR INTENTIONAL ACTS OF THE SHIPPER OR HIS CONTRACT AFFILIATES THE CUSTOMER SHOULD CONTACT THE SHIPPER FOR PROPER CLAIMS PROCEDURES IN THE EVENT OF DAMAGE OR LOSS RESULT ING FROM SHIPMENT 24 _ m LILJPEH ELELTH UNILE mmm 2003 JLCooper Electronics Product Names DAFV and Digital Audio Follows Video Interface are property of JLCooper Electronics All other product names are the property of their respective holders JLCooper Electronics 142 Arena Street El Segundo CA 90245 USA Printed in USA P N 932084
4. DAFV Digital Audio Follows Video Interface User Manual Second Edition Ws mmm 7 e i OOPER ELECTRONICS _ www jlcooper com DAFV Digital Audio Follows Video Interface User s Manual Second Edition 2000 2003 JLCooper Electronics 142 Arena Street El Segundo CA 90245 U S A Part Number for this manual 932084 Product Names DAFV and Digital Audio Follows Video Interface are property of JLCooper Electronics All other product names are the property of their respective holders Table of Contents TAttOQ QE TOT ecciesia reete ct od E 4 How the DAFV is Used tttttttttnnnnnnnnnnnntnnecnnn 5 Protocol Supportand Pini Ot 5 mitior 6 iter COR ECHOS sc o HET ERREUR Ree T Edit Controllet loo kp marssonii 7 Video Switcher Hookup natste 7 Syne Power Audio Hookup DAEV Basic Operation ernestine eene 9 Signal Indication Aboutthe Internal DIP SwitClis anssen 9 Selecting the MIXeE Gasse csesanirdesticcns itin roa tont lacet 9 Selecting Mono Stereo Quad Operation Mode nnn 10 Setting Upithe MIX ecdeces terree cce e terio 11 Panasonic DAT onontgonnen CREDE tee 11 Yamaha OARS OLV aided conterere antal stervende as 11 Yamaha OD a NA ITEE 12 Yamaha 02R96 DM1000 DM2000 nts 12 Mackie DMB SM 12 Roland VM C7100 VM C7200 ttn 12 Spirit DES A 12 Preparing for the Edit Session e 13 Monitoring Audio nadenkende 13 Set
5. ages from the video switcher To disable the transmission of acknowledgment messages make sure that the Y cord leaves the DAFV s output pins 2 amp 7 disconnected aya Connect the BNC connector to a source of Composite Video or Black Burst This is sync connection s optional it is not required that this be connected to operate the DAFV When sync is present DAFV waits until the next field edge 1 2 frame before executing a command received from an edit controller If sync is not present the DAF V automatically switches to an internal crystal generated clock Accuracy is guaranteed but field edge alignment is not Under most situations this is not important for audio editing since the maximum error is 18 milliseconds Power Connect the power supply to the power jack in the rear of the DAFV The supply is 9 VDC at 500 mA 1 2 Amp center positive When the unit is powered up an LED is lit next to the power switch Special Notice about AC Line Conditioning All microprocessor based equipment including VTRs switchers and audio processors must be protected from variations in the AC line The DAFV is no exception Power surges lightning strikes brown outs even nearby motorized equipment can scramble computer memories and in some cases even cause damage to the hardware It is strongly recommended that all your computer related equipment be plugged into an AC line conditioner Multiple outlet power str
6. amaha 03D Select MIDI Setup screen Under receive Rx set Control Change to ON Param Change to OFF Select Utility screen Under Host Interface select STANDARD I F Under General Setup set Rx port to CH 1 MIDI Yamaha DM1000 Press Display Access MIDI Select SETUP tab Set Parameter Change RX ON Channel RX 1 Fader Resolution LOW Press Display Access Setup Select MIDI HOST tab Set RX Port MIDI Mackie DM8 You must have Version 2 01 or newer to operate with DAFV Open the Channel List window control B On all input channels that are to be controlled by the DAFV set the following Ch Ch 1 Mode In MIDI On Any other control parameters should be left in their default settings Then you must go to the FILE menu and select Save Session or use keyboard shortcut CTRL S Without this Save operation you will need to edit the CHAN NEL LIST each time Roland VM C7100 VM C7200 These mixers where not available at the time of manual printing Please contact the factoty for an addendum relating to Roland VM C71000 setup when it becomes available Spirit Digital 328 Press MENU button lower right of display Scroll down with Param to until Automation Setup is flashing press ENTER If the display indicates MIDI Dynauto OFF turn Param to set MIDI Dynauto ON Press Exit Mic Line channels 1 through 16 will be controlled 12 Preparing for the Edit Session Monitoring Audio Prior
7. arranty JL Cooper Electronics JLCooper warrants this product to be free of defects in materials or workmanship for a period of 12 months from the date of purchase This warranty is non transferable and the benefits apply to the original owner Proof of purchase in the form of an itemized sales receipt is required for warranty coverage To receive service under this warranty customers in the United States should contact the JL Cooper factory at 310 322 9990 and talk to a service technician If necessary a Return Authorization number may be issued For our customers outside the United States it is recommended that you first contact your Dealer or Distributor since they may offer their own setvice or support policy If local support is not obtainable please send a FAX to JLCooper s Service Department at 310 335 0110 with a detailed description of the service required Upon issuance of return authorization the product should be properly packed and shipped to Service Department JLCooper Electronics 142 Arena St El Segundo CA 90045 Please include the following copy of the sales receipt your name and address no P O Boxes please a brief description of the problem and any other related items discussed with the service department and considered necessary to evaluate the product or effect a repair The return authorization number must be clearly written on the outside of the package JLCooper will without charge fo
8. by marking Source VIR and Record VTR in and out edit points On the edit controller program the mode of the audio edit A1 A2 ot both That is to say set up the Record VTR to record on track 1 track 2 or both Select the desired input sources by entering machine crosspoint numbers and destination bus on the edit controller Select the inputs that will go to the Record VTR after the dissolve Select by entering machine crosspoint numbers and destination bus on the edit controller Monitor the edit off of the Record VTR Set the input levels by playing the source VTRs and match levels with VIR outputs or mixer input trims Preview the edit Perform the edit on the edit controller Play the edit using the edit controller and check for audio level consistency from scene to scene 18 Mix Under Mix Ducking When working with music and dialogue there are times when the project calls for an edit that begins with music Then dialogue comes in and the music level drops When the dialogue is finished the music must return to its exact previous levels This is called Ducking To accomplish this set DAFV to Quad mode Say that one VTR or another source of music such as a CD has music on two tracks These tracks are connected to mixer channels 1 and 2 Another VTR has dialog on two tracks These tracks are connected to mixer channels 7 and 8 You need to send the music source in not two but four inputs of y
9. cedures for preparing for a session specifically that all interconnections have been made and levels are set Ensure that the edit controller is communicating with DAFV On the edit controller set up a cut by marking Source VIR and Record VTR in and out edit points On the edit controller program the mode of the audio edit A1 A2 or both That is to say set up the Record VTR to record on track 1 track 2 or both Select the desired input source s on the DAFV Program Bus Select by entering machine crosspoint numbers and destination bus on the edit controller 17 Select the inputs that will go to the Record VTR after the cut Select by entering machine crosspoint numbers and destination bus on the edit controller Monitor the edit off of the Record VTR Set the input levels by playing the soutce VTRs and match levels with VTR outputs or mixer input trims Preview the edit If necessaty adjust input levels on mixer and trim edit points on the edit controller Perform the edit on the edit controller Play the edit using the edit controller and check for audio level consistency from scene to scene Procedures for Edit Controlled Dissolve Check that you have followed the procedures for preparing for a session specifi cally that all interconnections have been made and levels are set Ensure that the edit controller is communicating with DAFV Set up a dissolve on the edit controller
10. gnal flow of the mixer these are before the channel inserts you should be able to monitor any channel of any machine even if they are cut by the DAFV 13 Setting Record VTR Input and Output Levels Before the session the input and output levels should be set on the Record VTR Using a tone generator oscillator or test tape play tone into the record VTR Adjust the tone level at the source for 0 VU Put the Record VTR into EE that is you want the Record VTR s meters to monitor the input signal Set record levels for 0 VU to match the source level Record 30 seconds of tone Play back the tone and if necessary adjust the VTR s output levels so that they are the same as the record levels Setting Source Input Levels If your source tapes were recorded with bars and tone and your source VTR s have output level adjustments then cue the source VTR to bars and tone If your source tapes were recorded without tone adjust each scene for consistency as required Play back bars and tone and adjust the Source VTR tracks 1 and 2 playback levels to 0 VU on the VTR s meters Since the DAFV will perform the transitions on the channel s faders using trim or input gain controls on the mixer adjust the actual balance or sound of the mix Follow the mixer s instructions for manually setting the Input Trim level knobs Further fine adjustments to the mix can be performed using programmable attenua tors if your mixe
11. hange the way your machines are connected to the mixer Selecting tbe Mixer Each supported mixer uses different MIDI commands for control The DAFV s rear panel DIP switches need to be set to correspond to the mixer type Yamaha 02R for 02R96 see next page OW rentestand Off SW2 Of SW3 Off SWA naren Off Please note that the DIP Switches are set at the factory for the Panasonic DA7 to operate in Stereo Mode See page 22 for information about channels 17 32 Yamaha DM1000 DM2000 02R96 SW1 n Tascam TM D1000 MIDI Volume SW1 Off SW ssscnigateneriaet On Switches 5 and 6 are reserved for future use Selecting Mono Stereo Quad Operation Mode When DAFV receives a command from an Edit Controller the mixer performs the transition by fading up some channels while fading down other channels If you have mono audio sources connected to the mixer then each mixer channel is treated as a separate machine by the edit controller In Mono Mode up to 4 mono machines may be controlled using the mixer channels 1 through 4 If you have stereo VTRs connected to the mixer then you want each stereo pair to be treated as a separate machine by the edit controller In Stereo Mode channels 1 2 3 4 5 6 and 7 8 are paired and treated as four machines by the edit controller If you have four channel machines connected to the mixer and then each group of four input channels s
12. hould be treated as a machine by the edit controller In Quad Mode channels 1 through 4 are machine 1 5 through 8 are machine 2 9 through 12 are machine 3 and 13 through 16 are machine 4 10 DIP switches 7 and 8 are used to select the operation mode Mono Mode SW 7 aen Off SW8 s Off Stereo Mode SW Togia On SW BSc Off Quad Mode SWT sees Off SWB rnaar On Setting Up the Mixer The DAFV controls the mixer using MIDI commands The digital mixer usually needs to be set up to receive MIDI commands The procedure for doing this is different for each mixer Generally speaking you usually go to a MIDI Setup page and turn MIDI Receive ON You must usually also set the MIDI Channel to Channel 1 On some mixers you must also set the communication speed and the communication port Below are some specific notes for the supported mixers regarding settings that must be made on the mixer to allow the mixer to be controlled by MIDI commands Panasonic DA7 Select the MIDI Setup screen Set Gen Rx to MIDI Ctrl hg Rx ON System Ex Rx ON Yamaha 02R not 02R96 Select the MIDI Setup screen Set Receive Channel to 1 Enabled Parameter Change See page 159 of the 02R owner s manual for more information 11 Yamaha 01V Select MIDI Setup screen Under receive Rx set Control Change to ON Param Change to OFF Confirm also the PORT is set to MIDI Y
13. in right away so that we can notify you of any updates or related products How the DAFV is Used Your digital audio mixer mixes the audio from various sources typically at least two Video Tape Recorders VTR s The output of the mixer goes to another VTR called the Record VTR JLCooper s DAFV connects to your mixer using standard MIDI cables The DAFV receives commands from an edit controller so your mixer can do automatic transitions that is cuts and dissolves The sound of the mix is dependent on the how the mixer is set up especially its input trim gain settings equalization additional signal processing etc The DAFV is only responsible for automatically bringing up or down the level of certain channels Though the inputs are typically stereo VIR s other audio sources could include DAT machines microphones or digital audio workstations DAFV can also be put into a Quad Mode in which it performs crossfades between two 4 channel machines The edit controller s EDL Edit Decision List lets you specify the in and out points of the edit The EDL may also select the kind of edit which audio tracks of the Record VTR are being recorded and which machines are program currently hot and which are preset hot after the next transition When the edit controller issues a crossfade command to the DAFV channels which were hot are faded out and channels which wete cut ate faded in The edit controller
14. ips usually have circuit breakers some have surge suppressors But ideally the system should be protected with a power conditioner that includes both surge suppression and line filtering Being plugged into conditioned power should protect the mixer edit controller switcher VTRs and DAFV2 Audio Hookup You may connect the output of several audio sources to your mixer such as VTRs DATs Microphones and CDs The individual VTR audio outputs are connected to the mic line inputs of the mixer using up to the first 16 channels These channels will need to be bussed as needed to route the audio path to the various outputs for monitoring and recording Refer to the operations manuals for your specific mixer for details 8 DAFV Basic Operation Signal Indicator On the tight side of the front panel is an LED that will show you if your DAFV is receiving messages When the DAFV first receives RS 422 data it momentarily flashes ON Once it has received either ESAM2 or GVG protocol it will turn on solid Subsequent RS 422 commands will cause it to flash Off momentarily About the rear panel DIP Switches On the back panel of the DAFV are eight small switches called DIP switches They are used to select the type of mixer you are using They are also used to select the basic mode of operation Mono Stereo or Quad explained below The switches will probably only need to be set once unless you change mixers or significantly c
15. m and preset bus Since an Audio crossfade corresponds to a Video Dissolve we use the terms interchangeably Suppose that you have two VTR s connected to four inputs of your mixer The DAFV is configured for Stereo Mode When you turn the DAFV on you can only hear the output of VTR A because VTR B s audio output has been cut by DAFV 15 A Cutis a fast transition one occurring within an interval of a frame is usually called a Cut instead of a crossfade An edit controller can only change the transition time the time it takes to fade out a machine while fading in another machine DAFV s transition time range is 0 to 255 frames Approximately 10 milliseconds to 10 seconds Edit Controller Operation An edit controller is a computer based interface responsible for tying together all VTR s ATR s switchers and mixers Its purpose is to coordinate the various machines and initiate execution of cuts crossfades and other effects The edit controller may be a generic software package for a PC with interface cards to connect to various machines or it may be a dedicated package targeted around a certain brand of video switcher In a small post facility it may also be the front end to an integrated desktop video editing effects processor Please notice that though the DAFV has the ability to respond to serial commands to execute instructions a given edit controller might not have the ability to send all the command
16. our mixer This can be accomplished easily if you have an audio patch bay Patch the direct out of channels 1 and 2 into the inputs 5 and 6 of the mixer Using programmable attenuators or trim controls as necessary Set the level of channels 1 and 2 for the music loud Set the level of channels 5 and 6 for the music soft Set the level of channels 7 and 8 for the dialog Before the edit Machine 1 that is the music only is on the Program Bus The edit consists of a dissolve to Machine 2 But because the music has been patched over to Machine 2 channels the dissolves will both bring up the dialog and set the music to a lower level The next edit is a dissolve back to Machine 1 This restores the music to its original level So the edit will simultaneously bring up the dialogue and lower the music Transitioning back will fade out the dialogue and raise the music to its previous levels 19 Technical Information DAFV Protocols and DIP Switches This document covers the serial RS 422 protocol used by the JLCooper Electronics DAFV ESAM GVG to Digital Mixer converter It also covers DIP switch settings Electrical As implemented on the DAFV the RS 422 protocol is at 38 4 kBaud with 8 data bits and one parity bit Parity Odd Even is automatically set The RS 422 comes into the DAFV via a 9 pin female Sub D connector on the rear The pin out conforms to SMPTE 113 standards and is as follows Pin
17. r has this feature If it does not then level matching can be performed using the output level controls of the VIR 14 Audio Editing Procedures Program and Preset Bus DAFV works in a manner similar to a video switcher Input audio sources are assigned to Program or Preset buses The buses toggle that is change places after a transition What was once the Preset bus becomes the Program Bus and vice versa In other words inputs are assigned to the Preset Bus before an edit point occurs These input signals appear on the Program Bus after the transition occurs The Edit Controller can assign a machine to the Program Bus which simply means that the machine will be brought up hot The Edit Controller can then assign a machine to the Preset Bus which simply means that it is brought down cut until the transition occurs At the transition the machine assigned to the program bus fades out and the machine assigned to the preset bus fades in Keep in mind that these are called bus only from the standpoint of the edit controller ot switcher The audio signal path isn t really bused routed anywhere unless you setup your mixer to send the signal path to an output Definition of Crossfade Dissolve and Cut A crossfade or dissolve simply means to fade out some audio signals while fading in other audio signals For users of Edit Controllers this can be more precisely defined as a transition or swap of the progra
18. r or video switcher controls the DAFV through a serial port The port may be on a plug in card or outboard interface box Some edit controllers have a dedicated port just for an audio mixet Other edit controllers have a dedicated port just for a video switcher By means of a Y cord DAFV can eavesdrop on that port The audio transition would occur when the edit controller sent a dissolve or cut command to the video switcher Edit controller interface cables are not standardized Interfacing the DAFV to your edit controller or video switcher may require special skills in making cables and reading manufacturers technical documentation Larger facilities will defer this chore to their engineering departments If you do not have the experience to attempt to make the interface cable we recommend that you ask your dealer to help you find a video service center that you can contract to assist you Video Switcher Hookup DAFV can get its commands from a Y cord listening in on the commands to a video switcher This is the case when an edit controller does not have a separate serial port available When a command is sent to a machine via a serial protocol the machine replies with a message of acknowledgment But in this case the video switcher will reply with a message of acknowledgment Therefore transmission of acknowledgment messages from DAFV must be blocked so that these messages do not collide with the acknowl edgment mess
19. r parts or labor either repair or replace the defective part s Shipping costs are not coveted by this warranty JLCooper s normal repair tum around time at the factory is approximately 15 business days from receipt of product to shipping Your actual turn around time will include return shipping Actual turn around time will vary depending upon many factors including the repeatability of the customer s reported complaint the availability of parts required for repair the availability of related products needed to evaluate the product if necessary Priority services are available These should be discussed with the service technician at the time the return authoriza tion is issued This watranty provides only the benefits specified and does not cover defects or repairs needed as result of acts beyond the control of JL Cooper including but not limited to abuse damage by accident negligence modification alteration improper use unauthorized servicing tampering or failure to operate in accordance with the procedures outlined in the owner s manual nor for acts of God such as flooding lightning tornadoes etc THE DURATION OF ANY OTHER WARRANTIES WHETHER IMPLIED OR EXPRESS INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY IS LIMITED TO THE DURATION OF THE EXPRESS WARRANTY HEREIN JLCOOPER HEREBY EXCLUDES INCIDEN TAL AND CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO LOSS OF TIME INCONVENIENCE DEL
20. s required to access every parameter within the DAFV In other words yout edit controller may or may not be able to take full advantage of all the features of the DAFV You may remotely control the following parameters of the DAFV Program Bus Assignments Preset Bus Assignments Transition Time nitiate Transition Stop Transition Fader Level Range 16 Machine Crosspoint Numbers The user interface of an edit controller is the Edit Decision List EDL The EDL allows the user to define edits by specifying a machine or crosspoint number edit point type of edit and transition time The EDL is where edits are entered and edited and then executed Machines such as VTR s are given numbers to identify them in the EDL This number is called the Machine Number or Crosspoint Number The editing system uses these Machine Numbers to assign the DAFV inputs to Program and or Preset Buses These Machine Numbers should be entered on a hardware menu in the Editing System An EDL command to Dissolve from Machine 1 to Machine 2 puts Machine 1 VIR A on the Program Bus and Machine 2 VIR B on the Preset Bus When an edit controller sends a command to assign Machine 0 to a Bus this results in the Bus Assignments turning off For example a command to put Machine 0 onto Preset Bus would turn off everything on the Preset Bus Procedures for Edit Controlled Cut Check that you have followed the pro
21. sets the crossfade time It is recommended that you allow some time to set up familiarize yourself and experiment with the DAFV before working on a commercial project The DAFV also has the capability of setting individual channel levels from an edit controller that has the ability to send the appropriate commands Here is the minimum equipment required for an editing session using DAFV used in conjunction with a digital audio mixer A Compatible Digital Audio Mixer The DAFV with its included power supply Two VTR s whose stereo audio outputs go to the mixer Another VTR to record the edited program A Monitor Amp with speakers or headphones Associated cables correctly connected e Some videotapes with audio recorded on both tracks An Edit Controller and or Video Switcher correctly connected to the DAFV Protocol Support and Pin Out The JLCooper DAFV responds to ESAM I amp II GVG 100 and RS 422 The DAFV automatically detects and configutes itself to receive the supported protocols The commands come into DAFV via a 9 pin female Sub D connector on the rear The pin out conforms to SMPTE 113 standards as follows Pitt 1 ginian Ground sp Output Anns P Input PHA ssa tin ierit iro Ground Din Oee diti no connection PEG EE ET EER Ground PINT irainen niia Output jung Input Pe 9 nose erdt Ground Interconnections Edit Controller Hookup An edit controlle
22. t the Program Crosspoint input nn for no input nn 1 for Machine 1 input i e audio inputs 1 amp 2 for stereo operation and audio inputs 1 through 4 for quad operation nn 2 for Machine 2 input etc Coa Preset Crosspoint Command 03 01 B5 nn Upon receipt of this string the DAFV will send back an 80 as acknowledgment and will use nn to set the Preset Crosspoint input nn 0 for no input nn 1 for Machine 1 input i e audio inputs 1 amp 2 for stereo operation and audio inputs 1 thru 4 for quad operation nn 2 for Machine 2 input etc f Fader Level Command 02 01 AD fn vv Upon receipt of this string the DAFV will send back a 80 as acknowledgment and will use fn to determine the fader number to which the value wv will be applied fn is in the range from 1 to 16 and vv is in the range from 0 to FF with 0 indicating off and FF full on This will become the maximum level a given channel may reach when acting as an active crosspoint Grass Valley Protocol A BREAK character is followed by anything EVEN other than 88 DAFV responds with 84 to all commands Command Structure LB NC CM Length Byte No Care 1 or 5 for audio or video Command Commands FB OB Auto Crossfade Start push button 11 CC Ox Oy Oz Transition time MSB first BCD Example 244 frames CC 02 04 04 F2 NC All stop C1 Om Program crosspoint assign C2 Om Preset crosspoint assign m
23. ting Record VTR Input and Output Levels annae 14 Setting Source Input Levels tts 14 Audio Editing Procedures 1 reete 15 Diaeta Preset Bionade edn 15 Definition of Crossfade Dissolve and Cut canan 15 Edit Gonttollet Opetation sissivsinssissscsssctisososseevvanscsscseeccosenvannaoinassccssecia 16 Machine Crosspoint Numbets ette 17 Procedures for Edit Controlled Cut 17 Procedures for Edit Controlled Dissolve nanne 18 Mix Under Mix Ducking iie across eire tiec itc 19 Technical Information censet aansneed 20 Electrical ESAM Protocol e r hie 20 Grass Valley Protocol isisisi 21 Troubleshooting Warranty and Service naenin 24 Introduction The JLCooper DAFV interfaces an edit controller to a digital audio mixer for automated audio follows video applications DAFV receives RS 422 commands using ESAM 2 and GVG 100 protocols It then outputs MIDI commands to control your digital audio mixer In the past audio follows video mixers have been somewhat limited in flexibility and featutes For a given application there may not have been enough audio inputs or outputs equalization or bussing capability The DAFV overcomes that problem by allowing you to choose your own digital mixer for the functions features and cost that meet your requirements Adding DAFV turns your existing digital mixer into an audio follows video mixer Please fill out the enclosed registration card and mail it
24. to doing any editing verify your audio hookup At least you will want to make sure you can monitor listen to every audio channel and set record and playback levels Since each mixer and mixer application is different if you are new to mixing have an experienced person help you set up your mixer For those of you fairly new to mixers and mixing here is a very general check list of common switches and settings that should be checked if you are having difficulty hearing audio playback ftom your VTRs Confirm the following The source VTR is in play and that there is an audio signal coming out meter indication Mixer inputs ate switched to the correct input jack and level MIC LINE switch and Input Trim Mixer inputs are not attenuated Many digital mixers have a programmable Attenua tor function Audio signal is on the expected fader or pot check Reverse or Flip switch if any Fader or Pot is up Channel is ON not CUT or MUTED Channel assign switch is pressed routing the signal to a group or L R bus e If channel is assigned to a group the group fader is also up and assigned to L R bus Master Faders and Control Room Pot up No stray SOLO or PFL buttons pressed There are usually only a few hundred of these It is hoped that the mixer has LEDs on each one of these buttons to tell which one has been pressed If the mixer has PFL Pre Fade Listen switches and in the si
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