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LavryBlue Series

Model LE•4496

Modular Audio System

Operations Manual

Содержание LavryBlue LE-4496

Страница 1: ...LavryBlue Series Model LE 4496 Modular Audio System Operations Manual ...

Страница 2: ...Lavry Engineering Inc PO Box 4602 Rolling Bay WA 98061 360 598 9757 http lavryengineering com e mail techsupport lavryengineering com Revision 2 1C June 2012 ...

Страница 3: ...3 c Specifications 4 3 M AD 824 Analog to Digital Converter a Operation 5 b Settings 8 c Specifications 10 3 M DA 824 Digital to Analog Converter a Operation 11 b Settings 13 c Specifications 14 4 MicPre Microphone Preamplifier a Operation 15 b Settings 16 c Specifications 16 5 Opening the 4496 17 6 4496 Chassis Specifications 17 7 Warranty 19 ...

Страница 4: ...This Page Left Intentionally Blank ...

Страница 5: ...t to right Because the M SYNC provides the clock source for all A to D conversion the M AD 824 A to D modules must be grouped together on the left side of the 4496 chassis M DA 824 D to A converters are placed in the next available slots to the right of the A to D s The MicPre would be furthest to the right in 4496 units with converter modules The MicPre is a doublewide module and thus would occup...

Страница 6: ...rt of the recording Therefore Lavry Engineering recommends that you operate A to D converters on Internal Clock if possible For External Clock operation set the far right switch on the M SYNC to one of two external sync modes WRD CLK to lock the M SYNC to an incoming external word clock signal The lock condition is indicated when the lock lamp illuminates AES to lock the M SYNC to an incoming exte...

Страница 7: ...l When lock is achieved it is indicated by the LOCK lamp illuminating The use of AES BLACK for AES Sync is recommended whenever possible This is an AES signal with all of the audio data set to 0 or in other words Mute Setting the WIDE NARROW switch to NARROW provides a 150 PPM lock range Use this setting for standard sample rates 44 1 48 88 2 96 kHz In Narrow mode the incoming Sync signal s sample...

Страница 8: ... 1 48 88 2 96 kHz WIDE MODE LOCK RANGE 42 50 kHz range in LOW 84 100 kHz range in HIGH SYNC INPUT The unit accepts an input sync signal at the rear panel BNC labeled SYNC IN This can be either a standard Sample rate WORD CLOCK 5V TTL level 2 5V 5V amplitude or an AES SYNC SIGNAL 2 5V 5V amplitude The input IS NOT internally terminated please see Regarding Termination below SYNC OUTPUT The unit pro...

Страница 9: ...by internal DIP switch for Pin 2 non inverting operation The output of the M AD 824 is AES digital format which is a 110 ohm balanced 5V standard The output is compatible with SPDIF format 75 ohm unbalanced and can be made compatible by using a simple adapter cable or barrel adapter from RCA to XLR In some cases with older SPDIF I O it may be necessary to use a transformer or simple electronic lev...

Страница 10: ...is blinking the function is not selected or OFF If it stays lit it is selected or ON The indicated Word Length can now be enabled by toggling down SELECT By Selecting the status of the next function is also displayed 3 Analog Soft Saturation This is an analog peak limiter before the input of the A to D converter to protect against overloads An internal 3 position jumper J6 enables the threshold to...

Страница 11: ...the M AD 824 s meters are expanded around the reference level so that each lamp indicates approximately 0 2dB of input level change above or below the reference level To use this mode you need an analog audio reference tone source 1 kHz for example The tone needs to be at a level that corresponds to the AVERAGE level of the music source This average level will typically be in the range of 10 to 20...

Страница 12: ...panel Wordlength selection between 24 20 and 16 bits Analog soft saturation rounding off signal peaks to enable driving the ADC harder for extra hot recording Digital soft saturation emulates tape saturation enabling 6dB hotter operation for signals under 12dBFS Reference Meter Bridge with 10 12 14 16 18 and 20dBFS reference points Peak Hold to hold and indicate the highest peak indicated by the m...

Страница 13: ...at you use balanced inputs for unbalanced sources as well Four jumpers J1 J2 J3 and J4 are located behind the analog input XLR connectors Please be sure to leave the jumpers set for balanced operation The settings are J1 to IN P3 J2 to IN P2 J3 to IN P3 and J4 to IN P2 Soft Saturation Jumper J6 enables the lowering of the threshold for the analog soft saturation feature and is labeled to denote th...

Страница 14: ...2 factory default user selectable by internal DIP switch Digital Output Male XLR AES Digital interface transformer coupled SPDIF compatible with appropriate adapters Output Word length 24 20 or 16 bits selectable from the front panel Bar Graph display 21 lamps indication color coded for each channel including MAX lamp for digital overload 0 to 10dBFS in 1 dB increments 12 to 20dBFS in 2dB incremen...

Страница 15: ... at different sample rates The 4496 is configured at the factory with the audio XLR outputs of the M DA 824 set for electronically balanced line level operation nominal 4dBm DO NOT CONNECT Pin 2 or Pin 3 to Pin 1 in the XLR for unbalanced operation without first setting the internal jumpers Doing so will cause distortion although the equipment is protected against damage from short circuit Please ...

Страница 16: ... in the wiring scheme FRONT PANEL SWITCHES LOCK MODE Use the front panel switch to choose the lock mode that is best suited for your source Choose CrystalLock to activate specialized hardware to provide almost total jitter elimination from the incoming digital signal This proprietary circuit utilizes a temporary buffer memory and a DSP controlled instrumentation digital to analog converter to effe...

Страница 17: ...Unbalanced configuration of the Analog Outputs It is electronically switched before the output stage so it will not physically change the connections to the XLR pins OUTPUT LEVEL Individual front panel volume controls 20 turn potentiometers for each channel provide 24dB s of adjustment range for the analog outputs These are located in the lower left and right corners of the front panel and are mar...

Страница 18: ...nd the shield should be connected on the XLR end of the cable Clock Modes setup a 4 position DIP switch designated as U18 determines the clock settings as follows Mode description Position 1 left most Position 2 Position 3 Position 4 right most Independent operation OFF OFF OFF ON C M DA 824 Specifications Noise 110dBFS 20Hz 22KHz unweighted Distortions 1kHz tone at 1dBFS 002 FS 1kHz tone at 20dBF...

Страница 19: ...ng full professional level signals The input will clip at the same level for any given Gain setting whether the Gain Pad is on or off The Gain display shows the total Gain input to output the Gain display changes by 10 dB when the Pad is switched on but it does not change the level at which the input will clip The Gain Pad is therefore not recommended for use with most professional audio equipment...

Страница 20: ...is a jumper U101 near the middle of the PC board towards the front panel for this function It is labeled Phantom and the Off position disables Phantom Power completely Optimizing for longer cable lengths near the Phantom Power jumper is a second jumper U80 labeled CMMR The default setting of this jumper is On for cables up to 200 feet long To optimize the input for cables longer than 200 feet the ...

Страница 21: ...gs section for the available switch settings and jumper options If an M AD 824 module and M SYNC are to be added to a 4496 that did not previously have them installed Lavry Engineering is required to perform the installation There are a number of critical calibrations that are part of this procedure Field upgrades not performed by Lavry Engineering or an authorized Lavry Dealer may void the warran...

Страница 22: ...LavryBlue 4496 Specifications 18 This Page Left Intentionally Blank ...

Страница 23: ...te jurisdiction to state jurisdiction LIMITS AND EXCLUSIONS LAVRY ENGINEERING DOES NOT BY VIRTUE OF THIS AGREEMENT OR BY ANY COURSE OF PERFORMANCE COURSE OF DEALING OR USAGE OF TRADE MAKE ANY OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE TITLE OR NONINFRINGEMENT AND ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIM...

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