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Related Manuals for Inovonics 719
Summary of Contents for Inovonics 719
- Page 1 DAVID IV...
- Page 3 DAVID IV...
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Page 5: Table Of Contents
TABLE OF CONTENTS Section I – INTRODUCTION DAVID IV PRODUCT DESCRIPTION ..........Features DAVID IV TECHNICAL SPECIFICATIONS ........General Performance Rear-Panel Appointments Audio Processing Features The User Interface Miscellaneous BLOCK DIAGRAM ................Section II – INSTALLATION GENERAL ..................Menu Navigation Setup Using the Software UNPACKING AND INSPECTION ............ - Page 6 Section III – SETUP AND OPERATION USER ADJUSTMENT GROUPINGS ..........Setup Adjustments Processing Adjustments Backing-up Settings “QUICK START TECHNOLOGY” ........... ‘Instant Boot’ Brownout Detection NAVIGATING THE MENUS ............Graphic Display Jog Wheel and Back Button Menu Timeout and Screensaver LANGUAGES .................. INTERNAL TONE GENERATOR ............
- Page 7 BROADBAND LIMITING ..............PIPP* Limiting Lookahead Limiting PIPP*, Normal or ITU? Limiter Drive Limiter Density MULTIPLEX POWER CONTROL (BS.412.9) ........The ITU “Recommendation” Other ITU Processing Implications ADAPTIVE PRE-EMPHASIS ............COMPOSITE CLIPPING ..............HD RADIO™ DELAY ..............Installing the Delay Subassembly Adjusting the Delay PROGRAM LINE OUTPUTS ............
- Page 8 Importing a Preset Section VI – UPDATING DAVID IV FIRMWARE THE FIRMWARE UPDATER ............Warning Firmware Update Files Running the Firmware Updater Aborting a Firmware Update ERRATA NOTES AND DOODLES ..............INOVONICS WARRANTY ......... (INSIDE BACK COVER) — 4 —...
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Page 9: Section I - Introduction
Section I INTRODUCTION DAVID IV PRODUCT DESCRIPTION The 719 is fourth in Inovonics’ series of “DAVID” FM Broadcast Processor/Stereo Generators. DAVID, referring to David vs. Go- liath, is an apt name for this series of airchain audio processors that consistently deliver giant-killing performance that belies the modest cost of ownership and simplicity of operation. -
Page 10: David Iv Technical Specifications
puts may be configured for FM, or for full-range digital broadcast requirements or Internet streaming. Optional “Diversity Delay” of the composite multiplex and FM-mode line outputs synchronize the analog FM signal with the digital program broadcast in the HD Ra- dio™... -
Page 11: Rear-Panel Appointments
AES Digital Output (Digital Input): RDS Input: >130dB at 0dBFS Unbalanced/bridging (BNC) input ac- cepts a 57kHz RDS subcarrier at any Program Signal Latency level between 0.5V p-p and 5.0V p-p for 3.6 milliseconds for composite/MPX; a typical injection level of 5% of total 4.2 milliseconds from any input to carrier modulation. -
Page 12: The User Interface
PIPP™ Peak Limiter: THE USER INTERFACE Inovonics’ exclusive Polarity-Indepen- Front-Panel: dent Peak Processor assures optimum A front-panel graphic display modulation of the FM carrier or other and jog wheel allow easy, menu-guided transmission system. (Page 30) in-situ setup and operation of the ITU Multiplex Power Control: DAVID IV. - Page 13 SWITCHING AND LEVEL CONTROL “WINDOWED” AGC DIGITAL INPUT HIGH-PASS STEREO ENHANCE ANALOG INPUT TONE GEN BAND BAND BANDPASS RECOMBINING FILTERS COMPRESSORS SLIDERS BROADBAND ADAPTIVE LIMITER PRE-EMPHASIS BASS EFFECTS BASS CHARACTER (MPX POWER CONTROL) FILTER AUGMENTATION OPTIONAL COMPOSITE COMPOSITE DIVERSITY STEREO COMBINER &...
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Page 14: Section Ii - Installation
As soon as the equipment is received, inspect carefully for any shipping damage. If damage is found or suspected, notify the carrier at once, and then contact Inovonics. We recommend retaining the original shipping carton and pack- ing materials for return or transshipment. If returned for War-... -
Page 15: Mounting
MOUNTING The DAVID IV mounts in a standard 19-inch equipment rack Rack and requires only 1¾ inches (1U) of vertical rack space. We Requirement recommend using plastic or fiber washers to protect the paint- ed finish around the mounting holes. Consuming less power when it’s running than many consumer Heat Dissipation products do when they are turned off, the DAVID IV itself gen-... -
Page 16: Program Line Inputs
shield grounds and the AC power cord ground. A ‘ground- lifting’ AC adapter may well remedy such a situation, although the chassis must somehow be returned to earth ground for safety. Generally, being screwed-down in the equipment rack will satisfy the safety requirement. PROGRAM LINE INPUTS The female XLR connector labeled AES DIGITAL INPUT is a bal- AES Digital... -
Page 17: Program Line Outputs
PROGRAM LINE OUTPUTS DAVID IV digital and analog line outputs are available simulta- neously and may independently be adjusted in level and as- signed the characteristic selected in the Setup / Audio Output menu (Page 37). Line outputs may individually be set for a 20kHz flat character- istic for digital radio, streaming, or other flat-power-bandwidth applications. -
Page 18: Composite/Mpx Outputs
COMPOSITE / MPX OUTPUTS There are two independent composite/MPX outputs on the rear panel of the DAVID IV. These are unbalanced BNC connectors, not surprisingly labeled MPX OUT 1 and MPX OUT 2. Their source impedance is a resistive 75 ohms. The level of the multiplex signal at each output is independent- ly adjusted under the Setup / Stereo Generator / Multiplex Output menu (Page 37). -
Page 19: Section Iii - Setup And Operation
Section III SETUP AND OPERATION This section of the manual takes the user through the steps of getting the DAVID IV into operation and discusses certain im- plications of the many audio processing adjustments. Please refer back to the previous section for information on the physi- cal interconnection of the unit with other station equipment. -
Page 20: Backing-Up Settings
There is, of course, some interaction between the two general groupings of DAVID IV adjustments. The processing sections depend on proper levels at the input, and output levels will be ambiguous unless the processing has been set up properly. Keep this in mind through the following guide, as it is arranged more-or-less in signal-path order. -
Page 21: Jog Wheel And Back Button
Turn the jog wheel to cycle among highlighted menu items, and Jog Wheel and then push the jog wheel to select or adjust the highlighted item. Back Button The Back button returns you to the previous menu. Push the Back button repeatedly to return to the Main Screen. In all setup instructions given here, the menus will be shown as a string of commands. -
Page 22: Internal Tone Generator
INTERNAL TONE GENERATOR A built-in test tone generator (audio oscillator) may prove help- ful in setting up the DAVID IV, or in verifying overall system performance. Navigate to: Setup / Oscillator. Off is the default selection for normal operation of the DAVID Pre and IV. -
Page 23: Setting Input Gain
Navigate to: Setup / Audio Input: Turn the jog wheel to position the brackets around either the Digital or the Analog audio input, and then press the jog wheel to confirm and save the selection. SETTING INPUT GAIN The DAVID IV has an intelligent dual-slope ‘windowed’ AGC Importance of (Automatic Gain Control) to gain-ride the program input signal. - Page 24 rection Rate of 1.75 (dB/sec), (Max) Gain of +18.0 (dB), and a Win- dow setting of 6dB (±3dB) as shown here: Although a “zero-VU” test tone may certainly be used during Using Test DAVID IV setup, input gain is most accurately set with actual Tones…...
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Page 25: The High-Pass Filter
There will, of course, be a range over which the AGC wanders; it is not realistic to expect the indicator to hover right at the 0dB mark all the time. But the indicator should spend about as much time above 0dB as it does below. The dB gain numbers shown below each input gain slider are somewhat arbitrary, but have been scaled so that 0dB equates to the program average level at nominal studio line level fig-... -
Page 26: Optimizing "Windowed" Agc Action
OPTIMIZING “WINDOWED” AGC ACTION Access the AGC screen and its adjustments with: Processing / AGC: Before setting the DAVID IV input gain under the previous sub- heading, the AGC was confirmed at the factory default setting; that is, AGC enabled over its entire ±18dB correction range with mid-values for correction rate and ‘windowing.’... -
Page 27: Stereo Enhancement
very unobtrusive 0.5dB/second. However, if the input signal suddenly blasts or takes a big dive, the correction rate then in- creases to whatever figure has been set by the Rate slider… say 2dB/second, which is four times faster. If the Window slider is set to 0, the windowing function is essentially defeated, and all AGC action will be at the speed set by the Rate slider. -
Page 28: Solo Width
is, to the left of the left speaker and to the right of the right one. As the control is advanced, the graphic display will highlight an area outside the normal soundstage as shown here. The shaded area, as well as the number shown below it, is somewhat arbitrary, serving only to illustrate what’s intended and to give a number for set- up reference. - Page 29 compression, with the threshold, waveform response and trans- fer function engineered for the most effective action within each band. Optimum Multipressor parameter settings were derived from exhaustive tests by a core of listeners comprising both tech- nical and non-technical types, including those with extensive musical training.
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Page 30: Spectral Loading
dible spectrum. Solo voices and instruments will have high en- ergy levels at their fundamental frequencies, whereas a band or orchestra will have a broader spectral profile with energy spread over a wide range of frequencies. Spectral Loading brings down the energy where it is the highest, and increases low energy at other frequencies. -
Page 31: The 5 Bands Defined
Highlight and select EQ. This gives access to five EQ sliders: The five DAVID IV bands are labeled: Bass, Low, Mid, Pres and The 5 Bands High. Although we have afforded some user adjustment over Defined crossover frequencies (described later), bands have these nom- inal boundaries: Bass The really deep bass frequencies that are generally lost without a good subwoofer. -
Page 32: Compressor Attack And Release
Note the ‘artist’s conception’ depiction of the five bands. Crossover frequencies are in data boxes above the crossover points, which may be bracketed, selected and changed. Each of the four crossovers is variable over about an octave, which is a 2:1 frequency ratio. Factory-default values are smack-dab in the middle of the range. -
Page 33: Bass Character Enhancement
our only word of advice is to return to our thoughtful and con- servative factory values if you start hearing something you don’t like. Bottom line: don’t mess with these if you have res- ervations about what you’re doing! BASS CHARACTER ENHANCEMENT The DAVID IV offers two separate and distinct options for augmenting deep-bass content in the program material. -
Page 34: Program Peak Control
PIPP* is an acronym for Polarity-Independent Peak Processing, PIPP* Limiting an Inovonics-proprietary (patented) technique used in the more recent analog and digital processing products from our firm. This is a function that can be turned on or off by the user, and when disabled the DAVID IV peak controller behaves much like any contemporary “lookahead”... - Page 35 its distinctive ‘sound’ or timbre. The PIPP* limiter will hold the peaky side to the 100%-modulation point, and will ‘expand,’ or increase the amplitude of the companion polarity until it also reaches the 100%-modulation limit. This implies that the waveform, which by definition is already “distorted”...
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Page 36: Limiter Drive
The Limiter Drive slider sets the input level to the broadband Limiter Drive peak controller section to determine how hard the limiter will be working. Much like the Drive control in the Multipressor sec- tion, this slider has been given a range far greater than re- quired, so that the effect of essentially no limiting vs. -
Page 37: Multiplex Power Control (Bs.412.9)
MULTIPLEX POWER CONTROL (BS.412-9) In 1998, the International Telecommunication Union (ITU), a The ITU key European standards organization, published their Recom- ‘Recommen- mendation ITU-R BS.412-9, the culmination of several years’ dation’ work to study and mitigate interference between broadcast sta- tions on the crowded European VHF-FM band. -
Page 38: Adaptive Pre-Emphasis
This slider, calibrated to the multiplex r.m.s. “0dBr” value cited in the ITU Recommendation, may be set at any value between –1dBr and +5dBr, accommodating any ‘fudge factor’ that might be permitted by the regulating authority in that location. In operation, the DAVID IV continues to utilize the native algo- rithm of the Limiter Density slider to anticipate a certain amount of average-level modulation control based on audio program dynamics. -
Page 39: Composite Clipping
nificantly reduce audible intermodulation artifacts, particularly those associated with vocal sibilants. Navigate to: Processing / FM HF-Limiter: The slider actually controls the attack time of the independent high frequency limiter. A near-instantaneous attack (10) will ensure that negligible high frequency clipping will occur. This will sound somewhat dull, especially with pop-music sources, but may keep artifacts to a minimum with more conservative fare. -
Page 40: Hd Radio™ Delay
with care. A conservative figure of 1.0dB, the factory default, is generally benign. Composite Clipping has no effect on either the analog or digital line outputs, even when they are set to their FM modes. HD RADIO™ DELAY The HD Radio digital broadcasting system, employed principal- ly in the U.S., is a ‘hybrid’... -
Page 41: Program Line Outputs
NOTE: The HD Radio Delay menu appears only if the accessory board is installed correctly. Use the front-panel jog wheel to navigate to: Setup / HD Radio Adjusting Delay: the Delay HD Radio delay may be set in 1ms increments, anywhere be- tween 1ms and 9.999 seconds. -
Page 42: Line Output Characteristic
on which output you intend to use, navigate either to: Setup / Digital Audio Output: Or to: Setup / Analog Audio Output: Note that the screens are very similar and the following expla- nation applies to either one. The checkboxes on the left select the characteristic of the pro- Line Output gram line outputs. - Page 43 The Digital Level is variable between 0dBFS and –20dBFS. FS re- fers to digital-full-scale, or as high as the digital signal can go. This means that audio peaks in the program signal, which have been limited to 100% modulation, can assume any level between digital-full-scale and a value 20dB below this.
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Page 44: Front-Panel Headphone Jack
FRONT-PANEL HEADPHONE JACK The headphone jack on the front panel monitors the broad- band-limited output of the peak limiter. This is a ‘flat’ monitor point that does not reflect action of the 15kHz low-pass filter and adaptive pre-emphasis for FM transmission, nor the effects of composite clipping. - Page 45 Mono (monaural Here the DAVID IV can be placed in the transmission) mode for testing or for special circumstances, though Stereo will be the usual choice for normal operation. Selecting Mono removes both the 19kHz stereo pilot tone and the S’ (L–R ‘stereo difference’) subcarrier. The 19kHz RDS sync output remains active, however, assuring that RDS messaging remains an available option in mono.
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Page 46: Rds Setup
RDS SETUP The Radio Data System, or RDS (called the Radio Broadcast Data System, or RBDS in the US), enables the FM broadcaster to transmit certain digital ‘metadata’ along with his program au- dio. The transmitted information includes certain mandatory housekeeping functions that identify the station format, keep track of rebroadcast translators, send time information, etc., and it can also display advertising or music artist and title info... -
Page 47: Processing Presets
When RDS Injection is set for a typical working figure of 5%, the slider should be neither at the very top nor at the very bottom of the adjustment range. This would indicate either an unusu- ally low or absurdly high level from the encoder, respectively. As RDS Injection is adjusted, total carrier modulation will not change. -
Page 48: Deleting Presets
When you have a name entered, highlight Save and push the knob. That will bring you back to the list where you will find your new preset just below the factory ones. The currently-selected preset is indenti- What am I fied by an arrow pointing to the name. -
Page 49: Administrative Settings
In ‘Proof,’ the input and output level controls remain function- al, but all dynamics-processing utilities are fixed at unity gain with a flat-frequency characteristic. In the science and magic of audio processing, it has become customary to make noise, distortion and similar measurements with processing stages ‘normalized’... - Page 50 unit is awakened from a dark screen. Similarly, the password must be entered on the controlling computer whenever connec- tion is made via the remote-control (software) interface. When working on a password-protected unit, check Disable to keep from having to enter the password each time the screen Enable the password when finished.
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Page 51: Section Iv - Networking The David
Section IV NETWORKING THE DAVID IV CONNECTING THE DAVID IV TO YOUR NETWORK IP (Internet Protocol) networking is a somewhat complex disci- pline that can present the broadcast engineer with formidable challenges. We’ve tried our best to make this easy, so please bear with us here. -
Page 52: Communicating From Outside The Local Network
Internet. To make it easy to remember, we picked a default port number of 719, the formal model number of the DAVID IV. This may be changed from the IP Settings menu, however. Your router must be configured for ‘port forwarding,’ using Port 719 to forward both TCP and UDP traffic to the IP address specific to the DAVID IV. - Page 53 Most DSL and TV-cable connections to the Internet are subject What is to ‘dynamic’ IP assignments. As described earlier, a router or Dynamic DNS? server working in the DHCP mode makes efficient use of a lim- ited IP address list by reassigning addresses as devices discon- nect from the network.
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Page 54: The Network Status Screen
If the entry field is not blank, turn the jog wheel until Backspace is highlighted, then push the knob repeatedly to erase any entry in this field. Then turn the knob to scroll through the field of symbols (numbers, letters, etc.), pausing and pushing the knob to enter the assigned Hostname. -
Page 55: Direct Computer Connection To The David Iv
anyone on the Web can find you. This is your external IP address and is assigned by your In- ternet Service Provider (ISP). The more common dynamic IP is subject to routine update (change), either on a schedule or as required. A static IP may be provided as an option by some ISPs and will remain constant. - Page 56 Beginning with Windows 7, however, this operation became a more simple matter. This illustration will use a Windows 7 ma- chine; other computers may require alternate methods. The main networking page is found under the Control Panel on Setting-up most versions of Windows. In the case of this Windows 7 ma- an ‘Imaginary’...
- Page 57 Highlight: Internet Protocol Version 4 (TCP/IPv4) and click the Properties button Next, select: Use the following IP address: and proceed to enter the IP information exactly as shown in the screenshot on the right. That is: IP address: 10.0.0.10 Subset mask: 255.255.255.0 Default Gateway: 10.0.0.1 Preferred DNS server: 10.0.0.1 When these entries are com-...
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Page 58: Section V - David Iv Remote-Control Software
Microsoft Windows® (XP and later). It is provided on the CD-ROM that accompanies each DAVID IV, or may be downloaded from the Inovonics Website: www.inovonicsbroadcast.com/downloads. Changes made via the software screen are immediately sent to the unit’s firmware. - Page 59 Windows XP, or the ‘meatball’ on Vista and newer operating systems. The program will be under All Pro- grams / Model 719 – DAVID IV. The installation routine will also have placed a shortcut icon on your Desktop. After confirming a network connection you may double-click this to launch the DAVID IV software.
- Page 60 In the Connect to this IP: box, enter the IP address of the DAVID IV shown on its front-panel display. In this use of our ‘tabletop LAN,’ the IP is: 192.168.0.100. Also enter the default number 719 in the Port: field, unless you must address two DAVID-IV units behind a common external IP address (Page 48).
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Page 61: Remote Control Of The David Iv
If the computer has any problem connecting with the DAVID IV, you will see a comment just below the bold wording, READY TO CONNECT. Click: Connection at the top of the software screen to display the drop- down menu shown here. Clicking: Connect here is the same as clicking the Connect button down below. - Page 62 You select any preset from the list by double-clicking it. As you change or fine-tweak any processing parameter, the NOW PLAYING PRESET: name will change immediately to None. What this means is that the preset that was on air has been modified and needs to be saved with a new name.
- Page 63 The Processing tab has two sub-tabs. The Compression tab is Processing illustrated here: Other tabs give access to adjustments that are found in front- panel menu items by the same names. The Setup tab has four sub-tabs with adjustments for in/out Setup levels, stereo-gen settings, networking setup and the built-in tone generator.
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Page 64: Profile And Preset File Management
2. Click the up/down buttons next to the value window. 3. Type a value directly into the window and then press Enter (or click anywhere the screen) to set that value. Or you may click any slider and use the mouse scroll wheel as a ‘virtual knob’... - Page 65 Recovering and reloading a profile back into your DAVID IV, or another unit, is simply the reverse of this process. Click: File / Load Profile from File, navigate to the proper folder, high- light the file you have saved and click: Open. The profile will be uploaded to the software screen and into DAVID IV firmware.
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Page 66: Importing A Preset
First, highlight (single- click) preset wish to save. (Remem- ber: if you double-click, you will put that preset on air!) It may be the preset currently on-air or could be any other user-created preset. the example illustrated to the right, we have se- lected a preset crafted especially for the after- noon drive. -
Page 67: Section Vi - Updating David Iv Firmware
This may be distributed as a download from the Update Files Inovonics Website or supplied on a CD-ROM or USB flash drive. Regardless of how the update is received, make a temporary New Folder on your PC Desktop and unzip these files to it as shown below. - Page 68 to install them. To circumvent this inconvenience, and also de- pending on how the Firmware Updater utility was delivered, we may have renamed the one file with a .ex_ extension. So the ac- tual file extension may be either .ex_ or .exe. If it was amended for delivery, the proper .exe extension must be restored for the Firmware Updater to work.
- Page 69 HOWEVER, once the updater process is underway, if it does not complete successfully there is a chance you could lose the ex- isting firmware version. In that case you will have to return your DAVID IV to Inovonics for a factory firmware reinstalla- tion. — 65 —...
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Page 70: Notes And Doodles
NOTES AND DOODLES — 66 —... -
Page 71: Inovonics Warranty
INOVONICS WARRANTY TERMS OF SALE: Inovonics products are sold with an understand- ing of “full satisfaction”; that is, full credit or refund will be issued for products sold as new if returned to the point of purchase within 30 days following their receipt, provided that they are returned complete and in an “as received”...
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