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Omnia 6 Use and Installation Guide – Version 1.00a

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approached. Stereo separation is typically greater than 65 dB. Suppression of the 38 kHz carrier is greater
than 75 dB. User parameters include

Separation

,

Pilot Phase

,

Pilot Level

and

Composite Output Level

.

Selectable Composite Clipper with Phase Linear Composite Low Pass Filter:

This feature is useful for

those who wish to “turbo-charge” their FM signal. This clipper is specially designed to not interfere with
the 19 kHz stereo pilot. There is also a digital implementation of the

Dividend

Composite Filter, which

allows composite processing to be used without generating any harmonic content in the SCA spectrum.
With 3 dB of composite processing employed, all content above 53 kHz is suppressed by 75 dB. This
precise spectral management contributes to loudness, ensuring that no wasted energy is transmitted.

New in Omnia-6fm is a pilot notch filter to protect the pilot region from clipper artifacts. The wide, deep
notch helps the stereo pilot region stay immaculately clean, reducing multipath, and keeping receiver's
stereo decoders firmly locked to your signal. (Some radios “look” at the pilot region to determine when to
activate their blend to mono and/or high frequency roll off functions.)

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Содержание 6FM

Страница 1: ...January 2002 Omnia 2101 Superior Avenue Cleveland Ohio 44114 USA TEL 1 216 241 7225 FAX 1 216 241 4103 Email info omniaaudio com www omniaaudio com Omnia Europe Johannistrabe 6 D 85354 Freising German...

Страница 2: ...Omnia website for product enhancement announcements software updates manual updates and customer care bulletins The following URL listing has been included for your update convenience Manual Updates...

Страница 3: ...roduct design engineering and marketing Not to mention we now have the vital assistance of three cats Omnia Zephyr and Mocha If I may say so our pool of engineers for DSP development and software desi...

Страница 4: ...dow Icon 13 Remote Control via Network Indicator 14 Headphone Level Control 14 User Interface Tutorial 15 The Menu Tree part one 17 The Menu Tree part two 18 Menu Items 19 Preset 19 Process 19 User In...

Страница 5: ...NG YOUR SOUND About Loudness and Listener Fatigue 49 Clarifying your Processing Objectives 49 Adjustment Procedure 50 Meter Displays 51 AGC Metering 51 Limiter Metering 51 Interpreting the Meters 52 A...

Страница 6: ...ers 91 System Parameters 92 Setting New Syspara Values 93 Using the Script Editor 93 Example Switch to Mono 94 Example Switch to Stereo 94 Interface Connector 96 One Way Scripts 96 Scripting via Daypa...

Страница 7: ...r this product during a lightning storm or when it is left unattended and unused for long periods of time unplug it from the AC wall outlet This will prevent damage to the product due to lightning and...

Страница 8: ...ING This equipment generates uses and can radiate radio frequency energy If not installed and used in accordance with the instructions in this manual it may cause interference to radio communications...

Страница 9: ...s 93 68 EEC CE Marking 73 23 EEC Safety low voltage directive 89 336 EEC electromagnetic compatibility Conformity is declared to those standards EN50081 1 EN50082 1 LITHIUM BATTERY CAUTION Danger of e...

Страница 10: ...make improvements or changes to the products described herein which may affect the product specifications and to revise this manual as required without notice Repair Procedures You must contact Omnia...

Страница 11: ...f 105dB The dynamic range of the Omnia 6 DSP chain is well in excess of 120 dB Typical SNR using the FactTest2 preset is greater than 80dB RMS in a 15 kHz bandwidth referenced to 100 modulation System...

Страница 12: ...eo mono from left mono from right or mono from sum Automatically accepts sample rates between 32 and 96 kHz Connector XLR female EMI suppressed Pin 1 chassis ground pins 2 and 3 transformer isolated b...

Страница 13: ...75 S de emphasized 15 kHz bandwidth referenced to 100 modulation Distortion 0 02 THD 20 Hz 15 kHz bandwidth 75 S de emphasized referenced to 100 modulation Stereo Separation Greater than 55 dB 30 Hz 1...

Страница 14: ...50VA Connector EMI suppressed IEC male Detachable 3 wire power cords supplied for US and European use Internal Power Supply Overvoltage and short circuit protected Meets EN55022 EN55011 Level B Conduc...

Страница 15: ...dealers be liable for incidental or consequential damages or for loss damage or expense directly or indirectly arising from the use of any of the Products or the inability to use any of the Products...

Страница 16: ...r audio source is providing an audio feed you should see meter activity on the Input Output and Processing meters 5 While in the Input menu and observing the Input meters adjust the left and right inp...

Страница 17: ...Omnia 6fm PCMCIA Type Memory card holding the DSP software PCMCIA Type Modem Card for use with Omnia 6 fm Remote Control Omnia 6fm Operating Manual this document Warranty Registration Card Please com...

Страница 18: ...provide technical support for any other modem card Typically any external Hayes compatible modem may be connected to the rear panel serial port See chapter 6 for more details on the Modem and the Remo...

Страница 19: ...t Install a 1RU 1 75 vented or solid panel to fill these spaces The processor should be installed into a thoroughly grounded 19 equipment rack Refer to Chapter 4 Omnia 6fm User Tips for additional con...

Страница 20: ...pling rate between 32 and 96 kHz No user adjustment is necessary on the AES input since a high quality sample rate converter is built into the unit Individual channel gain and level setting for both a...

Страница 21: ...ernal SCA or RDS generator this locking assures that no difference frequencies exist which may cause intermodulation components between the pilot and the SCA signal SCA Input BNC Any SCA signal above...

Страница 22: ...he Omnia 6fm s operation in response to logic signal transitions at the interface connection There is a unique response to each trigger input that is both go high and go low transitions are sensed Wit...

Страница 23: ...aults a second screen will appear when the unit does a warm boot to load the network parameters After approximately ten seconds audio will be present from the analog composite and headphone outputs Th...

Страница 24: ...Omnia 6 Use and Installation Guide Version 1 00a 8 8 This page intentionally left blank to maintain pagination...

Страница 25: ...owned Dorrough Loudness Meter as implemented in Omnia DSP code The left hand screen serves as the Meter Display It shows bargraph indications for the AGC and Limiter stages as well as VU and digital s...

Страница 26: ...ure of the Omnia 6 Processing changes and system adjustments can be quickly made with ease without having to remember multiple controls their positions and what they do in each menu The behavior of th...

Страница 27: ...rage about 15 dBFS 12 dBFS is approximately equivalent to 0VU in the analog domain Processing Display The thirteen vertical bargraphs in the lower half of the Meter Display show the processing activit...

Страница 28: ...multiple processing changes to be made quickly and with ease Home Icon When the Main Menu is displayed as shown above rotating the jog wheel sequentially highlights each menu item This is called Highl...

Страница 29: ...e selection in a multiple choice parameter highlight the desired choice with the jog wheel and click A filled box serves to indicate that a parameter choice is selected To adjust a rotary knob control...

Страница 30: ...modem based remote control session is in progress Headphone Level Control A standard stereo headphone jack located at the lower left corner of the front panel allows the processed signal to be monitor...

Страница 31: ...te the jog wheel until one of the Input Source choices Analog or AES EBU is highlighted The filled box next to the selection name identifies the current selection The factory default selection for Inp...

Страница 32: ...f 12 dB You may adjust for more headroom if you wish lower indications but setting the input level for less headroom higher meter indications is strongly discouraged 4 Once the desired gain is reached...

Страница 33: ...tree for the Omnia 6fm is shown in the following two pages The seven main menu items are bold for clarity with their branching parameter choices shown in the order in which they are encountered in th...

Страница 34: ...Omnia 6 Use and Installation Guide Version 1 00a 18 18 The next three Menu Options are shown below along with their associated branches...

Страница 35: ...red on the Omnia PC Card Highlighting a Preset and clicking Choose allows that preset to be loaded into the Omnia 6fm instantly setting the various processing parameters You may also compare and modif...

Страница 36: ...nput Submenu Output Submenu These two submenus provide level adjustments for the left and right inputs and the absolute peak operating level of the outputs Note that the analog and digital Input and O...

Страница 37: ...tion parameters are adjustable here Like the Input and Output menu choices these menu items are typically adjusted during installation and are saved as a System Configuration see above Encode Submenu...

Страница 38: ...ocessing settings If the system is not backed up and saved to the PC Card then the system restores itself to the last known saved set of parameters which will be the factory defaults if you don t use...

Страница 39: ...e the highlighting to the Preset List then rotate the jog wheel to highlight the desired preset name and click The processing algorithms will be updated to the new values almost instantly Modify Opens...

Страница 40: ...er and then rotate the jog wheel to highlight the checkmark to save your preset Highlight the X to cancel naming Note While scrolling through the character list you will see Ins Del and a blank space...

Страница 41: ...of this control with the input bargraph meters so that signal peaks the bouncing balls read at 12 dBFS but no higher Master Drive This control located after the input bargraph meters calibrates the n...

Страница 42: ...rolled off to prevent difficulties with certain exciters and STL systems The Omnia6 fm has a third order 18dB Octave high pass filter with five selectable cutoff frequencies from 60 Hz down to 20 Hz T...

Страница 43: ...re emphasis selection Note Normally the Off selection under the Pre emphasis options would not be used in FM transmission applications but is provided in instances where processing of a flat signal is...

Страница 44: ...0 s or 75 s Click the jog wheel to set the de emphasis selection If choosing a de emphasis time constant be sure it matches the pre emphasis time constant Bear in mind that if Pre Emphasis is turned o...

Страница 45: ...ntries that require it the proprietary Omnia 6 Multiplex Power Limiter maintains the average multiplex power as required by regulatory agencies The algorithm will maintain the average multiplex power...

Страница 46: ...ated modulation monitor to properly set modulation To aid quick adjustment it sometimes helps to advance the Clipping control before adjusting the composite outputs Note that reference line up tones a...

Страница 47: ...ystems when heavy processing is used When a setting of 3 dB or 6 dB is used the amount of L R perceived stereo effect is also reduced However in difficult RF signal coverage areas the amount of percei...

Страница 48: ...rompt permanently deletes that Schedule from the system memory Load from Card Retrieves Schedule daypart data stored on the Omnia PC Card This operation will restore any dayparts that were previously...

Страница 49: ...e set in the Security Config screen in the System Menu Level 1 User allows access only to the Menus selected in the Security Config window parts of the System Menu and the headphone level control The...

Страница 50: ...cy of better than 0 5 minutes per month Note An additional menu will prompt you to set the unit to Daylight Saving or Standard time Set Date Sets the current date which needs to be done before daypart...

Страница 51: ...ly displayed Date visible just below the Login Password dialog box Once presented with this information Omnia Customer Support will give you a special code to type into the password dialog box which w...

Страница 52: ...digit hexadecimal hardware address of the Omnia 6 Ethernet interface IP Address The customer assigned TCP IP address of the Omnia 6 Ethernet interface See your IT department if you aren t certain how...

Страница 53: ...bleshoot routing and other issues on the customer s network Security Config Under the Security Configuration screen you can assign what submenus may be accessed at password Levels 1 and 2 the lesser s...

Страница 54: ...Omnia 6 Use and Installation Guide Version 1 00a 38 38 This page intentionally left blank to maintain pagination...

Страница 55: ...o com Your Omnia 6fm comprises nine general processing sections as shown below Process Menu Block and Signal Flow Diagram Following is a list of these sections followed by an explanation of their func...

Страница 56: ...age phase rotator ensures symmetrical clipping of positive and negative peaks making better use of the symmetrical limitations of the FM medium This feature may be defeated for a more musically transp...

Страница 57: ...oudness increase when listening in stereo The stereo width is automatically controlled to avoid over enhancement Multiband Dynamic Peak Limiter Not just simple limiter sections using single time const...

Страница 58: ...ation of the Dividend Composite Filter which allows composite processing to be used without generating any harmonic content in the SCA spectrum With 3 dB of composite processing employed all content a...

Страница 59: ...of loudness Is the STL a Discrete or Composite system If a discrete system is used there must be a provision for a stereo generator encoder at the transmitter In that instance it is imperative that t...

Страница 60: ...ed at the studio if you follow a few guidelines and are willing to accept some limitations See Interfacing with a Digital STL and or Exciter below In this scenario there also must be a provision for a...

Страница 61: ...e propagation delay through any digital transmission device audio processors included We have measured the propagation time delay the amount of time it takes for the audio signal to travel from the in...

Страница 62: ...meters 328 feet The exciter input should be set for flat input which means that the exciter is not adding any pre emphasis to the input signal In the Omnia 6fm Input menu set the Pre emphasis ON at th...

Страница 63: ...emphasis phase delay is not exactly the same as the previous de emphasis in the processor overshoots will occur Therefore it is far more advantageous to employ pre emphasis only once in the Omnia 6fm...

Страница 64: ...Omnia 6 Use and Installation Guide Version 1 00a 48 48 This page intentionally left blank to maintain pagination...

Страница 65: ...his we firmly believe that Omnia 6fm will get you closer to your ideal than any other processor or combination of processors available today It is definitely capable of generating moment to moment lou...

Страница 66: ...blishing improved settings of operation unique to your stations 4 While making changes to the system we recommend that you do not make hasty or radical changes Also do not make too many different adju...

Страница 67: ...e metering is studied over time During normal operation the limiter indicators will have a dynamic bounce that you will be able to get a feel for Every now and then you will see the limiter react quic...

Страница 68: ...there will be more activity in the AGC sections and less activity in the Limiters This behavior is due to the AGC sections response to high RMS energy while the Limiters are reacting to lower peak en...

Страница 69: ...sted in the menu tree When you Choose a preset the control values are loaded into the DSP structure reconfiguring the Omnia 6fm s processing Omnia Telos does not warrant in any way that these presets...

Страница 70: ...ipper thresholds are raised so that no signal processing takes place The purpose of this preset is to allow the input output characteristics of the unit to be measured and the slopes of the input high...

Страница 71: ...ady to tackle Omnia 6 s more sophisticated adjustments To edit a preset it must first be loaded into the Omnia 6 Once loaded it can be modified as required to suite your tastes and processing goals Th...

Страница 72: ...s control should be adjusted to net approximately 12dB of gain reduction with typical programming Too little gain reduction can defeat the leveling function of the Wideband AGC Too much gain reduction...

Страница 73: ...t to 5 10 or 15 dB of gain reduction the gain will return to that pre defined level when gated How quickly the target gain reduction level is reached is set by the remaining RTP Speed settings Slow Me...

Страница 74: ...2kHz and 7kHz AGC Crossover Submenu The drive level to each AGC band can be set by the controls at the top of the window There is 6 dB of gain adjustment available for each band Just as in properly se...

Страница 75: ...e problem might still exist with some programming In those situations even an increase of the gate threshold control to higher numbers may not help the situation Therefore each band of the multiband A...

Страница 76: ...s may be appropriate Users have reported that release time settings of 1 5 for band 4 and 1 0 for band 5 work quite well to keep this issue under control without punching holes in the high end AGC Mix...

Страница 77: ...ue enhancement that adds filtered harmonics of the lower registers to the upper bass frequencies The algorithm extracts information contained in the initial attack to do its work and low frequency tex...

Страница 78: ...c sound Reducing the overall limiter drive too much can rob you of loudness Note also that the upper three limiter bands 4 5 6 will generally not show as much average gain reduction little or none at...

Страница 79: ...he resulting uncontrolled peak energy will go to the clipper instead Thus with this control you can artistically trade off the dynamic limiting against brick wall clipping as each has its own sound As...

Страница 80: ...f frequencies A tribute to this fact is the extremely fine 0 10dB step resolution of the controls Adjusting all 6 controls an equal amount is virtually the same as adjusting the Clipper Drive control...

Страница 81: ...versampled and is fully anti aliased This clipper control s adjustment range is 6 dB in 0 1dB steps It is advisable to make minor changes primarily as the loudness fine tuner Be careful there is a lot...

Страница 82: ...ower Limiter Controls The concept behind the Multiplex Power Limiter is deceptively simple It watches the average power of the processed pre emphasized audio in the left and right channels and adjusts...

Страница 83: ...ortions of talk programming and naturally occurring breaks in audio as would be seen in a normal broadcasting environment Setting the threshold control to values above 0 0dB will cause a like increase...

Страница 84: ...name highlight Save Current and click After prompting you to verify that you wish to save the settings over the currently selected preset the system will save the latest changes made to the current p...

Страница 85: ...sively here are some suggestions that should help you achieve that goal Conversely if you have the rare luxury to strive for increased sound quality we have suggestions for you too Omnia 6 is designed...

Страница 86: ...kely to encounter increased intermodulation and or harmonic distortion The following sections are provided to assist you in designing the personality of your station s sound As we said earlier there i...

Страница 87: ...your sound Adjusted in this manner the Limiter sections are relied upon to generate higher long term RMS levels which translates into increases in perceived loudness If the quest is to produce the lo...

Страница 88: ...C or Limiter The last option adjusting the Limiter Mixer is designed to provide a final minor trim to the spectrum If you ve noticed that we calibrated these controls in 0 10 dB steps then you know wh...

Страница 89: ...trong bass signal underneath a sustained vocal passage The vocal passage will begin to sound as if it warbles a little bit This is a sign that the over processed bass energy is pushing the vocal frequ...

Страница 90: ...Omnia 6 Use and Installation Guide Version 1 00a 74 74 This page intentionally left blank to maintain pagination...

Страница 91: ...E will be displayed where the Preset Name and System Time will be displayed once the remote connection is made All metering activity also be at idle Omnia 6 Remote Control as it appears on your comput...

Страница 92: ...hen also create a desktop shortcut to that executable if desired Note When you install Omnia Remote Control software updates you should move the old version and its associated connect dat file to a ne...

Страница 93: ...number is shown here The Omnia 6 Remote Control About Screen While you are configuring the data for the various connection types the Omnia Remote Control software can be run without having to connect...

Страница 94: ...g the RS 232 port Network if using the Ethernet port or Dialup if using a modem may be used This naming convention is not mandatory but it will help keep things tidy if you decide to use Omnia 6 Remot...

Страница 95: ...he Omnia Side Remote Control Using the Supplied PCMCIA Modem Omnia6 fm comes complete with a PCMCIA type modem card and you must have the modem installed in order to use Omnia remote control over a di...

Страница 96: ...nia to PC cable should be a straight through type A null modem cable will not work Connecting via Modem Configure a new connection also entering the telephone number to which the Omnia 6fm s Modem Car...

Страница 97: ...log box with Modem Initialization String edit box The extra dialing commands that modify modem behavior should be entered into the Modem Init box in the Edit Connections menu If you are modem init str...

Страница 98: ...one detection and Where x is the number to dial to reach an outside line if required and Where is a pause and Where yyy is the dialing prefix and Where zzzz is the dialing suffix There are many resour...

Страница 99: ...ble to communicate with the Omnia through a network firewall the first thing to check is whether traffic on port 1254 is being permitted Enter the password for the unit in the Password box If nothing...

Страница 100: ...establish a connection by going to the Options Menu selecting Auto Connect to Last Then the program will always connect to the Omnia 6fm using the last used startup connection entry Note that if you h...

Страница 101: ...s Upon occasion Omnia Customer Focus personnel may ask you to capture such data from the rear port if it seems necessary The serial communications parameters of the terminal program should be set to 8...

Страница 102: ...e and they respond to voltage levels on the rear panel Interface connector Trigger Control by Dry Contact Closures The simplest way to manipulate a Trigger Input is through simple contact closures to...

Страница 103: ...ed using the Trigger Script function Therefore we ll explain some of the different types of operations that can be performed and the different types of commands that are required to perform each one S...

Страница 104: ...window The Editor window is opened under the Options menu Edit Trigger Scripts To open the Script Editor window the computer running the Remote Software must be connected to and communicating with th...

Страница 105: ...ve to Card the Omnia will only remember your scripts until you power it off Once the scripts are downloaded into the processor they are executed when the appropriate logic transition occurs on their a...

Страница 106: ...the following format hour min sec am pm As an example typing Partadd Mon 5 00 00am enter commands the Omnia 6 to add a daypart on Monday at 5 00 00am partremove Removes a daypart from the current day...

Страница 107: ...in order to save it as a unique name saveas Saves the preset under a different name Example saveas BOOGY enter Commands the Omnia to save the current settings as preset BOOGY Non System Parameters par...

Страница 108: ...0 0dB 5 Output Left 8 0dB 6 Output Right 8 0dB 7 SCA Level 20 0dB 8 Composite 1 3 98 V 9 Pilot Level 10 0 10 Phase Adjust 0 0 deg 11 Deemphasis 50uS 12 Preemphasis 50uS 13 Analog Phase 1 14 LED Sourc...

Страница 109: ...requested operations that FM broadcasters want to easily accomplish switching between mono and stereo operation This procedure can of course be done by manually using the Omnia 6fm front panel control...

Страница 110: ...Script box should look like syspara 9 1 syspara 25 2 If you wanted to use the sum of Left and Right channels for your mono source we would have entered the command syspara 25 4 instead of syspara 25 2...

Страница 111: ...nd ground pin 5 on the Interface connector on the processor s back panel Setting the relay or switch on shorting pins 1 and 5 together then causes the Omnia 6 to follow the script for go low the unit...

Страница 112: ...pin 1 is held low the contact or switch is in a closed state the Omnia 6fm will switch to and stay in mono mode no Pilot and only the left input channel is used When the pin 1 contact is subsequently...

Страница 113: ...g and composite audio will continue to run for approximately nine seconds and then nine seconds of no audio will elapse while the DSP code is reloaded If Omnia Remote Control is connected by a modem o...

Страница 114: ...se of the script A script may be entered and saved but will not be executed until the enable box is checked The preset list also has an enable box which can be used to disable the default action of ch...

Страница 115: ...and also how to obtain help or repair service from Omnia Rear panel RS 232 port To use this feature you only need a standard terminal program for DOS Windows or other operating system Configure it fo...

Страница 116: ...ring boot up Note that the Omnia s serial port is designed to operate without handshaking This makes it compatible with a variety of external devices It also makes it stupid meaning that you don t nee...

Страница 117: ...ction of installed software version Work System Storage Work Omnia Card Work Preset Table Msg set preset RocknRoll alg old null alg new fm_6band Work Load Algorithm Work Load Algorithm Work Load Algor...

Страница 118: ...see these messages during normal programming if the audio input level falls below 37 5dBFS and remains there until the audio fail algorithm times out Audio Restoration Alarm Approximately five seconds...

Страница 119: ...erating system was unable to write to the non volatile RAM on the motherboard Failed to initialize RTC a fatal error The operating system could not initialize the Real Time Clock IC on the motherboard...

Страница 120: ...rner of the motherboard see below 1 Remove the Omnia 6 from service 2 Make certain that no power is applied to the unit 3 Remove all 30 top cover screws and set them aside 4 Remove the lid and set it...

Страница 121: ...ked NC Note Failure to re install the jumper on the NC terminals will prevent operating power from being applied to the non volatile RAM at boot up and the motherboard will be unable to initialize The...

Страница 122: ...port and the procedure outlined earlier in this chapter Possible causes for this behavior are 1 The rear panel PCMCIA memory card is not properly seated in its socket Power off the unit reseat the car...

Страница 123: ...vironments Narrowing down problems When actually troubleshooting your Omnia 6 try to ascertain some preliminary information first before embarking on an in depth problem solving mission Take time to c...

Страница 124: ...ed Digital to Analog converters Therefore it s possible for one type of output to fail without affecting the other Likewise a failure in the AES EBU driver section could result in the digital output b...

Страница 125: ...s that contains the DSP code and its enhancements Location of PCMCIA memory card containing the DSP code Software enhancements that are contained on the rear panel PCMCIA memory card can be installed...

Страница 126: ...o power is applied to the unit 11 Remove all 30 top cover screws and set them aside 12 Remove the lid and set it aside 13 Remove the front panel memory card by fully depressing the card eject button s...

Страница 127: ...ty Loaner units are usually available on a first come first served basis Your Omnia Customer Focus engineer will assist you with the necessary arrangements Via the World Wide Web The Omnia Web site ha...

Страница 128: ...ase Attack Output Submenu Make Up Gain MH AGC Release Peak Level Left Gate Thresh Attack Hold Thresh Peak Level Right RTP Speed Release Limit Thresh Bypass RTP Level Make Up Gain BS 412 Limiter In AGC...

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