WIF user manual
Contents
1. Factor The 3 left digits show the Frame Rate Format which F carries various meaning depending on the signals 2 Video Input Only applied to the WIF2 When a video signal without VITC is applied to the Video input connector the Frame Rate Format BBB AAAA indicates the frame rate of the applied video signal The following table relates the Frame Rate Format with the video standard The table shows the Pull AAAA Pull Up Pull Down Factor Up Down Factors applied by the up x1 down In the Status Mode the 4 rightmost digits of the Switch display show the Pull Up Pull Down Factor engaged Frame Rate Format Video Standard by the up x1 down switch This factor is applied to either 44 1 kHz or 48 kHz base sample rate The 0 999 following table helps you interpret the numbers 3 LTC Input Only Down Factor 1000 N E connector the Frame Rate Format indicates the time ne A E code format of the applied LTC signal The following TOM PAL pull up provides a summary The table shows the Pull ee si 25 24 or 4 change in the Sample Rate Up Down Factors applied by the up x1 down 0 960 PAL pull down Switch 24 25 or 4 change in the Sample Rate 1 001 NTSC pull up Frame Rate Format _ Time Code Format Up __ Down 1001 1000 or 0 1 change in the Sample Rate 0 960 0 999 NTSC pull down 0 960 1000 1001 or 0 1 change in the Sample Rate 29 97 fps drop frame 0 999 29 97 fps non drop frame 0 999 Rem2. available LED Display 8 x HP 7503 6mm 0 3 red Dimensions 11 4 cm W x 3 1 cm H x 16 8 cm D 1U 19 rackmount kit available Weight 0 7 kg T
3. set it is not necessary to open the box because in the power up routine the display shows the current settings as abbreviations The routine starts with the display test and shows the firmware version briefly followed by the midi cue mode dip 1 3 and the jam duration dip 7 and remains in the status mode as long as no LTC or VITC signals are applied The table below lists the functions of the DIP switches and the according display abbreviations DIP No Settings Abbreviation Function midi cue mode OFF no output during jog shuttle FuLL MTC Full Message Loc MMC locate command qFb quarter frame bursts qFb 2 quarter frame bursts 2 Jam Durationtion J8 8 frames J32 32 frames GE B ea 30 default standard 30 fps I DIP 1 3 Midi Cue Mode Midi Time Code is the standard used to translate SMPTE time code into MIDI messages There are two basic types of messages described as Quarter Frame and Full message The Quarter Frame message is used for normal running status at play speed The Full message communicates a specific time for locating or cueing 10 Unfortunately many devices which are using MTC do not have implemented the Full message For that reason the WIF2 supports some other midi cue modes for locating or cueing your sequencer audio workstation frame accurately to a master time code One of these methods to cue up a DAW is the use of the MMC Locate command if the slaved DAW supports MMC slav
4. WIF2 word clock interface user manual MH ma op m ee oe ORS Ea MEY 44 1 x1 on Ite vite lock ata x256 WIF2 word clock interface Hardware Synchroniser for Digital Audio Workstations TABLE OF CONTENTS 1 Front Panel 2 3 Time Code Display Back Panel l Time Code Mode ll Status Mode AAAA Pull Up Pull Down Factor BBB Frame Rate Format 1 No Input 2 Video Input Only 3 LTC Input Only 4 VITC Input Only 5 Video amp LTC Unit Operation l Selection of Clock amp Time Code Source ll Varispeed Internal DIP Switches l Midi Cue Mode ll Jam Duration lll Default Standard Specifications oO o1o1 O1 B ND o NNN 1 Front Panel ONAN rm poredan HU UU m go ooo P 9 g OPAO O 1 Time Code Display The display has two modes the Time Code Mode and the Status Mode In the Time Code Mode the display shows decoded SMPTE time code applied to LTC or VITC input In the Status Mode the display shows the Frame Rate Format on the left and the Pull Up Pull Down Factor on the right The Frame Rate Format relates to the frame rate of the incoming time code or to the frame rate of the incoming video signal The Pull Up Pull Down Factor shows the pull up pull down selected by the Up x1 Down Switch See the Time Code Display section p 5 for more information 2 on Switch Turns the power to the WIF2 on and off Each time the MIF3 is powered up it runs through the disp
5. be daisy chained One output can properly drive one input The cable length for a word clock signal should be limited to 4 5 m 15 feet for the Superclock it has to be kept under 1 m 3 feet 12 LTC input Connector This RCA connector accepts an unbalanced LTC time code signal The input circuit exhibits a wide range of sensitivity 40 to 20 dBu This allows reliable operation of the unit with nearly all LTC sources When an LTC signal is applied the WIF2 will translate it to high quality MTC and a low jitter clock output If the LTC format changes the Time Code Display will briefly switch to the Status Mode to indicate the new format For a more detailed description please refer to the Unit Operation section p 8 13 MTC Connector This 5 pin DIN connector outputs Midi Time Code MTC The MTC signal can be applied to any MIDI interface For reliable operation use only shielded MIDI cables For more information please see the MIDI cue mode section p 10 14 VAC input Use the provided AC power cord to connect the WIF2 to the AC power supply through this connector 3 Time Code Display The display has two modes the I Time Code Mode and the Il Status Mode l Time Code Mode In the Time Code Mode the display shows decoded SMPTE time code applied to LTC or VITC input The time code appears as hours minutes seconds and frames This is the normal display mode of the WIF2 whenever time code is appl
6. ck speed up to some percentage typically 10 The WIF2 supports varispeed operation when deriving the master clock from LTC If the LTC is gradually changed the clock will follow the change to keep digital audio equipment in sync The deviation from the nominal play speed that will be tracked is limited to 10 This is to prevent the errors that occur in many digital audio workstations when this limit is breached If the LTC speed changes dramatically which happens when the LTC source machine stops or shuttles the WIF2 will not follow the change In this case the unit will continue generating the clock at the sample rate just before the LTC went out of range In other words the WIF2 exhibits sample rate memory This sample rate memory serves to dramatically reduce LTC lock up time Once the LTC returns back to useful range the WIF2 will relock and gradually adjust the clock to match the new LTC speed Similary whenever LTC disappears the unit will continue generating clock without any glich The unit remembers the last sample rate and continues to freewheel at that rate Note you may not want the clocks to continue at the off speed rate due to a previous off pich operation To reset WIF2 clock to nominal frequency turn the unit off or toggle the Up x1 Down switch 9 5 Internal DIP Switches The WIF2 unit has eight internal DIP switches to preset the synchronizer To get the information how these eight internal swiches are
7. e mode together with MTC slave mode Therefore set the midi cue mode to Locate for example with Digidesign ProTools 4 2 Roland VS 880 Fostex FD8 Then the WIF2 outputs an MMC locate command instead of the Full message Other recording software can be located by a burst of several quarter frames The Creamware Triple DAT Software for example works fine with the midi cue mode gFb 2 ll DIP 7 Jam Duration The time code drop out correction bridges up to 8 frames DIP switch 7 sets the error correction to 32 frames This causes also a post roll time of 32 frames after the master time code has stopped lll DIP 8 Default Standard The default standard setting defines the time code standard when the unit is powered up ll 6 Specifications LTC input RCA female 40 to 20 dBu 10k ohms 0 5 to 200 of playspeed reverse and positional format auto detection 24 25 30 drop 30 fps Video input BNC female 75 ohms terminated PAL NTSC Composite Sync reads VITC in lines 6 to 22 MIDI output 5 pin DIN The Complete MIDI 1 0 MTC quarter frame and full messages MTC quarter bursts MMC locate Word output BNC female 75 ohms TTL x1 or x256 sample rate 42 336 44 056 44 100 44 144 45 937 kHz 46 080 47 952 48 000 48 048 50 000 kHz Lock range 10 of nominal speed Clock jitter lt 1 ns per audio frame Resolution 23 ppm Power Euro EN 60 320 230 VAC 50 Hz 30 mA 115 VAC 60 Hz 60 mA version also
8. ember the Pull Up Pull Down Factor works in 30 fps 0 999 conjunction with the 44 1 48 switch to determine the Note the WIF2 detects 29 97 non drop frame exact sample rate of the clock outputs format as 30 fps when 29 97 fps LTC is applied without any video signal This will cause a pull down by 0 1 This Pull down can be corrected by setting the Up x1 Down Switch to the Up position This problem only occurs with 29 97 non drop format 6 Sis 4 VITC Input Only When an VITC signal is applied to the Video input connector the Frame Rate Format indicates the frame rate of the applied VITC signal The following tablel relates the Frame Rate Format with the VITC format The table also shows the Pull Up Down Factors applied by the up x1 down Switch If there is a VITC video signal present the WIF2 uses this video signal as clock reference and the VITC as positional reference If VITC video and LTC are present at the same time the video signal is used as clock reference and the LTC is used as positional reference If the LTC signal falls out of range because the source machine is stopped jogged or shuttled the unit switches automatically to VITC for positional reference Once the LTC is restored to play Frame Rate Format VITC Format Up Down 1 041 0 960 speed the unit switches back to LTC as the source time code reference At all points LTC and VITC LEDs of the front panel indicate the time code s
9. ied This mode provides the user with the ability to monitor the incoming time code ll Status Mode This display mode indicates Frame Rate Format and the Pull Up Pull Down Factor The Frame Rate Format relates to the frame rate of the incoming time code or the frame rate of the incoming video signal The Pull Up Pull Down Factor shows the pull up pull down selected by the up x1 down switch The display will remain in the Status Mode in the following two instances 1 When the unit is powered up and no LTC or VITC signal is present 2 When only a video signal without VITC is applied to the unit Otherwise there are two other instances in which the BBB Frame Rate Format display briefly switches to the Status Mode before 1 No input reverting to the Time Code Mode When the unit is powered up and no signal is applied to either LTC or VITC connector i e WIF2 is not 1 Whenever the format of the LTC or VITC input locking to any reference the Frame Rate Format changes follows to the default standard which can be defined 2 Whenever the up x1 down switch is toggled by the internal DIP switch 8 The table shows the Pull Up Down Factors applied by the up x1 down In fact toggling the up x1 down switch is the easiest Switch way to redisplay the Status Mode information Frame Rate Format Default Standard Up Down In the Status Mode the 4 rightmost digits of the display always indicate the Pull Up Pull Down
10. lay test shows the software version and the internal dip switch settings 3 on indicator Indicates proper function of the built in power supply 4 Itc Indicator Indicates when a valid LTC signal is detected 5 vite Indicator Indicates when a valid VITC signal is detected Note when a video signal without VITC is applied the VITC indicator will not light 6 lock Indicator Indicates when the clock output is locked to an incoming reference The incoming reference can be an LTC VITC or video signal 7 up x1 down Switch up setting applies the Pull Up Factor to the 44 1 or 48 kHz sample rate x1 setting leaves the clock at the exact rate of 44 1 or 48 kHz down setting applies the Pull Down Factor to the 44 1 or 48 kHz sample rate If you are not using any Pull Up or Pull Down sample rates set this switch to x1 which will let the WIF2 generate the standard 44 1 or 48 kHz sample rates Whenever this switch setting is changed the Time Code Display will switch to the Status Mode to display the new Pull Up Pull Down Factor Please see the Time Code Display sections p 5 for further explanation of the pull ups and pull downs 8 44 1 48 kHz Switch Switches the x1 x256 output clock rate between 44 1 kHz and 48 kHz The exact sample rate also depends on the position of the up x1 down switch located just to the left of this switch If you
11. need to operate at exactly 44 1 kHz or 48 kHz please set the up x1 down switch to x1 9 x1 x256 Switch Changes the signal at the Word output Connector between Word Clock and Digidesign s x256 Superclock Set the switch to x256 when connecting the WIF2 to Digidesign s 888 or 882 interface Set the switch to x1 when connecting the WIF2 to any word clock digital audio device 2 Back Panel VIDEO WORD LTC MTC 230 VAC input output input 50Hz 6W m C Made in Germany by Rosendahl Studiotechnik DO NOT REMOVE COVERS OM 10 VIDEO input Connector This BNC connector accepts any VITC or video signal A possible source could be a VITC a black burst or any composite video signal Even unstable video sources such as consumer VCRs can be used The input is terminated with a 75 Ohm resistor In order to avoid double termination do not T off the signal to other terminated video inputs When a VITC or video signal is applied the WIF2 will lock to it and produce a low jitter clock Additionally when a VITC signal is applied the WIF2 will translate VITC time code into MTC If the VITC format changes the Time Code Display will briefly switch to the Status Mode to indicate the new VITC format 11 WORD output Connector This BNC connector outputs a Word Clock or a Superclock depending on the setting of the x1 256 switch Neither the Word Clock or x256 Superclock should ever
12. ource Automatic switch over is a special feature of 25 NTSC drop frame 1 001 0 999 NTSC non drop frame 1 001 0 999 5 Video and LTC When an video signal without VITC is applied to the Video input connector and an LTC signal is applied to the LTC input connector at the same time the Frame Rate Format indicates the time code format of the applied LTC signal The following table relates the Frame Rate Format with video standard and the LTC format The table also shows the Pull Up Down Factors applied by the up x1 down Switch Frame Rate Video LTC Format Format Standard 25 fps 1 041 0 960 NTSC 29 97 fps non drop 0 999 Note the LTC format must mach the corrosponding video standard 4 Unit Operation I Selection of Clock amp Time Code Source If there is only an LTC signal present the WIF2 uses the LTC as positional and clock reference This means that the word clock output is locked to the LTC input The time code data from the LTC is translated to the MTC output If there is a LTC signal and a video signal present at the same time the WIF2 uses the LTC signal as positional reference for the MTC output and the video signal as clock reference for the word clock output 8 the WIF2 because it always guarantees the selection of the best possible time code ll Varispeed Many digital audio systems are capable of varispeed operation The equipment will follow the change in the master clo
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