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INTRODUCTION 

 
 
Welcome to a new world of possibilities.  Generation VIII is by far the most advanced digital to analog 
converter available today.  It offers the advantages of Theta’s legendary mastery in digital signal processing 
and sound quality unapproachable by any other equipment. 
 

Getting to know your Generation VIII 

 
Despite the Generation VIII’s great technical sophistication, we believe in making it as easy as possible for 
you to use.  We think you’ll enjoy the intuitive way the Generation VIII works.  Rather than offer a frustrating 
bewilderment of little used functions in constant view, vying for your attention, Generation VIII is structured 
systematically by function. 
 
This Generation VIII has been put through a rigorous and unique testing procedure that insures that it will 
last for many years with minimal service requirements.  This procedure includes the following: 
 

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All assembled circuit boards are given a thorough visual inspection and are then tested in a bench-
reference Generation VIII. 

 

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The tested, assembled circuit boards are then installed in a new Generation VIII and the whole unit is 
tested for every function and parameter. 

 

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The unit is put on a burn-in torture rack for 100 hours to test for any possible component failures. 

 

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The Generation VIII is tested on an audio analyzer for all pertinent parameters. 

 

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The Generation VIII is put through a final bench test wherein every possible feature, mode and 
parameter is checked. 

 

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The unit has all remaining chassis components installed and then undergoes a complete visual 
inspection, which assures that all Generation VIII’s meet visual specifications. 

 

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The unit is then put through a critical listening test. 

 
 

Burn In Time 

 
This unit has a break in period of about 1 week during which continuous improvement in sound quality will be 
observed.  It is recommended that music or the internal burn-in signal be played continuously through the 
unit during this time to expedite the break in period. 
 

Summary of Contents for Generation VIII Series 3

Page 1: ...THETA DIGITAL Generation VIII Series 3 Owner s Manual V 2 00 Digital Done Right...

Page 2: ...of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency ene...

Page 3: ...xclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the product W...

Page 4: ...now and as upgrades and or options are installed Whenever upgrades inquiries service repair and or changes are requested the serial number will be required SERIAL NUMBER DATE PURCHASED DEALER S NAME...

Page 5: ...TILATION SPACE ABOVE THE UNIT IMPROPER VENTILATION OF THE UNIT MAY CAUSE OVERHEATING WHICH MAY DAMAGE THE UNIT AND CAUSE A FIRE PLACE THE UNIT ON A SOLID SURFACE ONLY I E NOT ON CARPET ETC DO NOT PLAC...

Page 6: ...TIONS 10 Input Select Buttons 10 Changing Inputs 10 SETUP 11 Jack and Input Names 11 Clocking 12 Unity Gain 12 Input Offset Level 12 Burn In 13 Remote Triggering 13 RS232 14 IR Source 15 Using Generat...

Page 7: ...nel Display of the Burn In Signal SETUP menu 13 Figure 13 Front Panel Display of the Remote Trigger SETUP menu 13 Figure 14 Front Panel Display of the RS 232 SETUP menu 14 Figure 15 Front Panel Displa...

Page 8: ...ng All assembled circuit boards are given a thorough visual inspection and are then tested in a bench reference Generation VIII The tested assembled circuit boards are then installed in a new Generati...

Page 9: ...Ventilation is an important issue when placing the Generation VIII in a system Make certain that the Generation VIII is placed in a well ventilated area or rack unit There must be a clear path for co...

Page 10: ...al to Analog converter dB Decibel a relative unit of loudness Digital to Analog Converter DAC A device that converts digital signals into an analog format DSP Digital Signal Processor Processing Hz He...

Page 11: ...4 Generation VIII Block Diagram Figure 1 Generation VIII Block Diagram...

Page 12: ...5 Used to select a desired INPUT or parameter to change in the SETUP menus The LED in the button lights when the button is pressed These buttons are referred to as the INPUT SELECT buttons 5 SETUP but...

Page 13: ...mentarily show the unit s serial number 12 IR Remote Extender jack An externally mounted remote Infrared Receiver IR plugs into this miniature stereo phono jack The signal must be demodulated Please r...

Page 14: ...7 Menu Maps Setup Menu Pages Within the Setup feature following are all possible Setup menu pages Not accessible when fixed volume option is installed Figure 4 Setup Menu Pages...

Page 15: ...on will cycle the VFD brightness through full brightness and off 4 Mute button Mutes unmutes all audio outputs Not active when optional fixed volume cards are installed 5 Setup button Used to enter ex...

Page 16: ...GHT buttons will adjust the master volume To exit the SETUP menu simply press the SETUP button again In the past Theta has offered various options with their products With the Generation VIII most of...

Page 17: ...of 5 inputs Buttons 1 through 5 are used to select a desired input or audio source The LED in the selected button will illuminate when pressed When the Generation VIII exits the standby mode the last...

Page 18: ...NPUT is to be edited Use the LEVEL UP DOWN buttons to change the parameter Use button 2 to reassign a rear panel input jack to the currently selected front panel INPUT SELECT button Jack Definition RC...

Page 19: ...ks the incoming signal Note When using multiple Generation VIII s with a single source it is best to select Reclocking so that each Generation VIII s data clock will be synchronized with the incoming...

Page 20: ...control in a unity gain structure Press the SETUP button once to exit the menu Burn In All new in circuit devices and cables require a burn in period The Generation VIII provides a white noise that ca...

Page 21: ...current a device to be triggered draws the more the output voltage gets reduced The formula is Output voltage 12 I x 33 where I the current draw from the triggered device in Amperes Refer to the devi...

Page 22: ...d as external DACs with Theta Casablanca s and or Casa Nova s which are equipped with a Digital Output card The Digital Out cards of both processors and the Generation VIII have External Volume Data j...

Page 23: ...his setting Press the SETUP button once to exit the menu Note Pressing any button will change the display brightness to full for X minutes Initial Volume Level When the Generation VIII first comes out...

Page 24: ...is the DSP software version number Press SETUP to exit this menu or button 5 to go to the first SETUP page BALANCE Function This function allows the user to temporarily set the Left Right balance for...

Page 25: ...18 APPENDIXES...

Page 26: ...eneration VIII Fuse blown Check the fuse and if necessary replace ONLY with same type and rating No LOCK light Defective or intermittent cable Verify that the digital cable is not defective by checkin...

Page 27: ...e a main power switch To avoid audible distortion and or overall signal degradation do not use standard audio cables for digital audio or video signals It is recommended that all cables including spea...

Page 28: ...21 Figure 22 Example of Connections to from a Casablanca II III Digital Out Card...

Page 29: ...it will take over control of the Generation VIII When updating it will read and store the internal hardware configuration and user settings and then update and or overwrite the flash files on every b...

Page 30: ...0000101 STANDBY C 12 00000111 MUTE D 13 00001000 SETUP E 14 00001110 DISPLAY F 15 00001111 LEVEL UP 10 16 00010000 LEVEL DOWN 11 17 00010001 LEVEL RIGHT 20 32 00100000 LEVEL LEFT 21 33 00100001 PHASE...

Page 31: ...24 Appendix E RS232 Protocol RS232 Hardware Connections These are the connector drawings only The RS232 cable must be a regular RS232 or mouse extender cable that are wired pin for pin...

Page 32: ...t 3 where Header 254 241 Command identifier byte Argument 1 byte Argument 2 byte Argument 3 byte Each command will be able to access the system configuration directly eliminating the need to press any...

Page 33: ...Specified Decrement 0 33 Variable See List Variable List Variable Name Range Range Description 0 Master Volume 0 86 1 Volume Muted 0 1 0 Not muted 1 Muted 2 Display Brightness 0 4 0 Full 1 3 4 2 1 2...

Page 34: ...3 Ch 7 8 4 Ch 9 10 5 Ch 11 12 6 None 32 Screensaver Time 1 60 Time in minutes 33 Initial Volume 0 86 0 Level 0 1 Level 1 etc 50 Inp_Offset_LVL_1 0 86 0 Offset 0 86 Offset 86 51 Inp_Offset_LVL_2 0 86 0...

Page 35: ...me 9 Setup Screensaver 10 Setup Initial Volume 11 Setup Version 12 Edit Balance 15 Setup Unity Gain 16 Setup Offset Level Status Returned Byte Description Value 1 Input 1 5 2 Jack 1 14 3 Volume 0 86 4...

Page 36: ...Keypress List Key Value 1 5 1 5 Mute 8 Setup 11 Display 13 Standby 14 Level up 15 Level down 16 Level Left 19 Level Right 20 Phase 21 Discrete Off 25 Discrete On 26 NOTE RS 232 Feedback in only avail...

Page 37: ...hted Crosstalk 140dB Single Ended Output Specifications Output Impedance 12 Ohms Maximum Output Level 9 Vrms 3 2 VRMS if Fixed Volume option installed Frequency Response 20 Hz 20 kHz 0 01 dB Ref 1KHz...

Page 38: ...Boxed with accessories Environment Operating Temperature 32 to 95 F 0 to 35 C Storage Temperature 22 to 167 F 30 to 75 C Relative Humidity 95 maximum without condensation Remote Control 1 hand held b...

Page 39: ...gation to any person The warranty is valid only in the country in which the unit was purchased 3 REMEDY In the event the above product fails to meet the warranty and the above conditions have been met...

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