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OPTIMOD

TROUBLESHOOTING

5-3

If you are using analog inputs, the headroom of the unit's analog-to-digital (A/D) con-
verter must be correctly matched to the peak audio levels expected in your system (using
System Setup). If your peak program level exceeds the peak level you have specified on
setup, the 6200's A/D converter will clip and distort. (See page 2-24).

Audible Noise On-Air

(See also “RFI, Hums, Clicks, or Buzzes” on page 5-2.)

Excessive compression will always exaggerate noise in the source material.

The 6200 reduces this problem with its compressor gate, which freezes the gain of the
AGC and compressor systems whenever the input noise drops below a level set by the

GATE THR

(Gate Threshold) control, preventing noise below this level from being fur-

ther increased.

If you are using the 6200's analog input, the overall noise performance of the system is
usually limited by the overload-to-noise ratio of the analog-to-digital converter used by
the 6200 to digitize the input. (This ratio is better than 100dB.)

It is important to correctly specify the

AI CLIP

level in the System Setup: Analog I/O

screen to optimize the noise performance available from the analog-to-digital converter.
You should specify the level as the highest peak level that will be presented to the 6200
under normal operation. If, in an attempt to build in a “safety factor” or increase head-
room, you specify a higher level than this, every 1dB of extra headroom that you gain
will be accompanied by a 1dB increase in the 6200's noise floor.

The 6200's AES/EBU input is capable of receiving words of up to 20 bits. A 20-bit word
has a dynamic range of approximately 120dB. The 6200's digital input will thus never
limit the unit's noise performance even with very high amounts of compression.

If an analog studio-to-transmitter link (STL) is used to pass unprocessed audio to the
6200, the STL's noise level can severely limit the overall noise performance of the sys-
tem because compression in the 6200 can exaggerate the STL noise. For example, the
overload-to-noise ratio of a typical analog microwave STL may only be 70-75dB. In this
case, it is wise to use the Orban 8200ST Studio Chassis to perform the AGC function
prior to the STL transmitter and to control the STL's peak modulation. This will optimize
the signal-to-noise ratio of the entire transmission system. An uncompressed digital STL
will perform much better than any analog STL. Section 1 of this manual has a more de-
tailed discussion.

Shrill, Harsh Sound

This problem can be caused by excessively high settings of the

HF GAIN

control. It can

also be caused by excessively high settings of the

B5 THR

(Band 5 Compression Thresh-

old) control. In this case, you are first likely to notice the problem as harsh sibilance on
voice.

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Содержание OPTIMOD 6200

Страница 1: ...Operating Manual OPTIMOD 6200 6200S Digital Audio Processor...

Страница 2: ...wherever it appears alerts you to important operating and maintenance instructions in the accompanying literature Read the manual IMPORTANT NOTE Refer to the unit s rear panel for your Model Model Nu...

Страница 3: ...spilled into the enclosure through openings Damage Requiring Service The appliance should be serviced by qualified service personnel when The power supply cord or the plug has been damaged or Objects...

Страница 4: ...apr svente autoris Safety Instructions Spanish Hacer funcionar el aparato s lo con la tensi n y clase de corriente se aladas en la placa indicadora de caracter sticas Reemplazar los fusibles s lo por...

Страница 5: ...pack the unit for shipping 1 Tighten all screws on any barrier strip s so the screws do not fall out from vibration 2 Wrap the unit in its original plastic bag to avoid abrading the paint 3 Seal the i...

Страница 6: ......

Страница 7: ...Operating Manual OPTIMOD 6200 6200S Digital Audio Processor...

Страница 8: ...on under static control conditions Simply walking across a rug can generate a static charge of 20 000 volts This is the spark or shock you may have felt when touching a doorknob or some other conducti...

Страница 9: ...Left Right Input Output 1 6 Studio Transmitter Link 1 7 Transmission from Studio to Transmitter 1 7 Location of OPTIMOD DAB 1 10 At the Transmitter is Best 1 10 Where Access to the Transmitter Plant i...

Страница 10: ...treaming Applications 1 21 Using the 6200 in Non Streaming Applications to Prepare Audio Files for Download 1 22 Decoder Headroom 1 22 Loudness 1 22 Choosing your Encoder 1 23 MP3 1 23 Warranty Feedba...

Страница 11: ...ure 2 8 4000 HF Limiter Jumpers 2 20 Figure 2 9 4000 Pre Emphasis Jumper 2 20 Figure 2 10 4000 Pre Emphasis Jumper 2 21 Figure 2 11 4000 Stereo Coupling Jumper 2 21 System Setup 2 23 Analog I O Setup...

Страница 12: ...and Structure 3 20 Setting Up the Two Band Structure 3 20 Gain Reduction Metering 3 21 Using the Two Band Structure for Classical Music 3 21 The Two Band Structure s Full Setup Controls 3 22 Table 3 4...

Страница 13: ...e Sound Quality 5 4 Excessively Loud Commercials DTV applications 5 4 Inconsistent Levels DTV applications 5 5 Incorrect Lip Sync DTV Applications 5 5 Troubleshooting IC Opamps 5 5 Technical Support 5...

Страница 14: ...rter SRC 6 12 4 Digital Sync Input Receiver 6 13 Output Circuits 6 14 1 Stereo Digital to Analog D A Converter 6 14 2 Analog Output Stages 6 15 3 Digital Sample Rate Converter SRC and Output Transmitt...

Страница 15: ...23 3 2 soft keys 2 11 buzzes 5 2 bypass locally 1 15 PC remote 1 16 remote interface 1 15 C cable 2 8 shielding 2 8 chassis getting inside 4 2 circuit description 6 6 circuit ground 2 11 clicks 5 2 c...

Страница 16: ...4 G gain reduction meters 2 12 3 2 metering 3 21 gate LED 2 12 3 2 GATE THR control 3 23 30 getting inside the unit 4 2 grounding 2 5 7 10 11 ground loops 2 10 H harshness 5 3 headphones 1 14 HF Freq...

Страница 17: ...lems 5 2 processing structures protection 3 9 13 two band 3 9 11 20 multi band 3 26 program associated data 1 13 protection structure 3 9 13 setup 3 13 R radio presets 3 9 rackmounting unit 2 5 rear p...

Страница 18: ...22 drive control 3 23 release control 3 23 setup 3 20 U unbalanced inputs 2 9 unpacking 2 2 user feedback 1 23 user presets 1 5 V vendor codes 6 28 voltage selector 2 4 vu meter 2 27 W warranty 1 22 6...

Страница 19: ...onfiguration 1 6 Studio Transmitter Link 1 7 Location of OPTIMOD DAB 1 10 Using Lossy Data Reduction in the Studio 1 11 Interfacing to the Transmitter 1 12 Setting Modulation Levels 1 13 Monitoring on...

Страница 20: ...n in the most competitive commercial environment Because OPTIMOD DAB incorporates several audio processing innovations exclu sive to Orban products you should not assume that it can be operated in the...

Страница 21: ...analog monitor outputs are transformerless balanced and floating with 30 impedance to ensure highest transparency and accurate pulse response All input output and power connections are rigorously RFI...

Страница 22: ...ion s sound and increasing loudness and definition remarkably without pro ducing unpleasant side effects OPTIMOD DAB rides gain over an adjustable range of up to 25dB compressing dynamic range and com...

Страница 23: ...actory Processing Preset but you must then store those settings as a User Preset which you are free to name as you wish The Factory Preset remains unchanged User Presets User Presets permit you to cha...

Страница 24: ...6200 s output sample frequency to house sync if required OPTIMOD DAB is designed to simultaneously accommodate digital and analog inputs and outputs You select whether OPTIMOD DAB uses the digital or...

Страница 25: ...therefore be carefully qualified before you use them to carry the peak controlled output of the 6200 to the transmitter For example the MPEG Layer 2 algorithm can increase peak levels up to 4dB at 16...

Страница 26: ...lways use 48kHz output sample rate to achieve best peak control If you must use an analog input you may bypass any anti aliasing filters in digital links driven by the 6200 because the 6200 s output s...

Страница 27: ...Many such links have been designed to be easily configured at the fac tory for composite operation where an entire FM stereo baseband is passed The re quirements for maintaining stereo separation in c...

Страница 28: ...compression this situation will yield lower performance than if OPTIMOD DAB is connected directly to the transmitter be cause artifacts that cannot be controlled by OPTIMOD DAB will be introduced by t...

Страница 29: ...t the studio site can minimize the audi bility of this noise AGC applied before the audio link improves the signal to noise ratio because the average level on the link will be greater Further many STL...

Страница 30: ...he threshold where it will be heard Also you should minimize the number of encode and decode cycles because each cycle moves the added noise closer to the threshold where the added noise is heard Inte...

Страница 31: ...ce overshoot Fortunately as the au dio bandwidth becomes lower this becomes less of the problem because the 48kHz sam ple rate within the 6200 oversamples the audio and therefore becomes less likely t...

Страница 32: ...odulation of the transmissions if it turns out that most receivers are clipping due to perceptual encoding overshoots Monitoring on Loudspeakers and Headphones In live operations highly processed audi...

Страница 33: ...cast After the EAS broadcast resume normal processing E Press Setup button F Press TEST soft key G Hold down the MODE soft key turn the control knob to display operate then re lease the soft key This...

Страница 34: ...OPTIMOD DAB via modem or direct null mo dem cable connection with IBM PC compatible computers running Windows PC ac cess is permitted only with a valid user defined pascode A front panel soft key lab...

Страница 35: ...ge to turn it on by accident Then they can t un derstand why the sound becomes low fidelity mono and why everyone is suddenly speaking Spanish Consequently many consumer manufacturers buried the SAP c...

Страница 36: ...This material is typi cally either mono or two channel stereo It includes commercials live news game shows talk shows soap operas and many documentaries sports and pop music videos and concerts Proces...

Страница 37: ...such measurements were so large that they were not useful in controlling the levels of commercials well enough to eliminate viewer complaints The CBS loudness meter divides the signal into seven octav...

Страница 38: ...1 channels are applied directly to the AC 3 encoder The 6200 is configured for one frame delay The AC 3 encoder is configured with a pre set that 1 reduces its delay by one frame 2 defeats the AC 3 e...

Страница 39: ...nput can accept any sample rate from 32 to 48kHz The output of the 6200 can be set to either the professional AES EBU or the consumer SPDIF standard Many sound cards with digital inputs accept SPDIF s...

Страница 40: ...of operation but most cards designed for audio produc tion will do so The processor is then used in loop through mode accepting unprocessed playback from the computer and emitting processed audio whi...

Страница 41: ...igh fidelity audio on the Internet The 6200 is well matched to MP3 and can effectively pre process audio intended for MP3 playback Warranty Feedback The warranty which can be enjoyed only by the first...

Страница 42: ......

Страница 43: ...ut and Output Connections 2 8 AES EBU Digital Input and Output 2 10 Grounding 2 10 6200 Front Panel 2 11 Installation of Studio Level Controller optional 2 13 System Setup 2 23 Analog I O Setup 2 24 D...

Страница 44: ...should ever have to ship the 6200 e g for ser vicing it is best to ship it in the original carton with its packing materials because both the carton and packing material have been carefully designed t...

Страница 45: ...xpose the internal circuit board C Move jumpers J301 and J303 according to Figure 2 1 Jumper J301 sets the left channel termination and jumper J303 sets the right channel termination D Replace the top...

Страница 46: ...safety fuse F1 must be Slow Blow amp for 115V or amp 250mA T type for 230V CONDUCTOR WIRE COLOR L N E LINE NEUTRAL EARTH GND BROWN BLUE GREEN YELLOW BLACK WHITE GREEN NORMAL ALT PLUG FOR 115 VAC USA C...

Страница 47: ...6200 OPTIMOD DAB requires two standard rack units 3 5 inches 8 8 cm Model 6200S requires one standard rack unit 1 inches 4 4 cm There should be a good ground connection between the rack and the 6200 c...

Страница 48: ...ls The terminals can be connected together and then connected to ground at pin 1 to create a Remote Common If you use 48V connect a 1k 10 2 watt carbon composition resistor in series with the Remote C...

Страница 49: ...Interface Connector 8 Connect inputs and outputs See the hookup and grounding information on the following pages Audio Input and Audio Output Connections Page 2 8 AES EBU Digital Input and Output Page...

Страница 50: ...tereo mono left mono right analog input digital input digital output parameters low pass filter See Remote Interface Programming on page 2 36 The 6200 remote control accepts a DB 25 connector Digital...

Страница 51: ...the 6200 in put If the output of the driving unit is unbalanced and does not have separate CHASSIS GROUND and or LOW output terminals connect both the shield and the black wire to the common or ground...

Страница 52: ...manner But with care it is possi ble to wire an audio studio so that it provides maximum protection from power faults and is free from ground loops which induce hum and can cause oscillation In an id...

Страница 53: ...ive at VHF because of the wire s self inductance 6200 Front Panel Screen Display labels the four soft keys and provides control setting information Screen Contrast button adjusts the optimum viewing a...

Страница 54: ...ED indicates gate activity lighting when the input audio falls below the threshold set by the gate threshold control with the Modify screen s FULL CONTROL GATE THR control When this happens the compre...

Страница 55: ...s cannot be defeated then configure the 8200ST for flat output In this case average modulation levels of the STL may have to be reduced to accommodate the overshoots 1 Configure the 8200ST s internal...

Страница 56: ...LIPPER OFF JE JF LEFT OUTPUT RIGHT OUTPUT JE JF LEFT OUTPUT RIGHT OUTPUT FLAT PRE EMPHASIZED JB JC LEFT OUTPUT RIGHT OUTPUT JB JC LEFT OUTPUT RIGHT OUTPUT PEAK AVG Clipper Jumpers Output Pre Emphasis...

Страница 57: ...dula tion of the STL C Turn off the tone by pressing the TONE button If the STL transmitter suffers from bounce or overshoot you may have to reduce the L OUT and R OUT control settings to avoid peak o...

Страница 58: ...2 16 INSTALLATION ORBAN Model 6200 JUMPER A CLIPPER DEFEAT OPERATE JUMPER B LEFT OUTPUT JUMPER C RIGHT OUTPUT FLAT FLAT PRE EMPHASIZED PRE EMPHASIZED Figure 2 6 464A Jumper Settings...

Страница 59: ...is place jumpers B and C in the FLAT position C Replace the top cover then replace all screws snugly Be careful not to strip the threads by fastening the screws too tightly 2 Install the 464A in the r...

Страница 60: ...T LEVEL meter just illuminates on program peaks D Adjust the OUTPUT ATTEN controls to drive the STL to 100 modulation on pro gram peaks as shown on its modulation indicator 4 Set 464A s controls for n...

Страница 61: ...that the 4000 be used to provide the necessary pre emphasis If the STL transmitter s pre emphasis cannot be defeated then configure the 4000 for flat output In this case average modulation levels of...

Страница 62: ...y limiter Place jumpers JF JE JA and JB in the position for the pre emphasis of your STL 25 s 50 s 75 s 150 s or J 17 JUMPER JF JUMPER JE JUMPER JB JUMPER JA Figure 2 9 4000 Pre Emphasis Jumper E Set...

Страница 63: ...front panel B Adjust the 4000 s Channel A and B OUT Output levels for 100 peak modula tion of the STL 4 Calibrate the 4000 s Input level for normal operation using tone Skip this step if you wish to...

Страница 64: ...gain or loss E Press the OPERATE button Observe the LIMITING meter If no gain reduction is indicated the standard line up level is below thresh old If gain reduction is indicated the standard line up...

Страница 65: ...th a 32kHz sample rate set the MAX LPF to 15 0 kHz That way a setting of 20kHz elsewhere will not cause excessive bandwidth and aliasing because the 6200 will automatically override it with the MAX LP...

Страница 66: ...put output parameters While holding down the appropriate soft key use the front panel control knob to adjust the parameter settings as desired If a parameter is not visible and the Next and Prev butt...

Страница 67: ...s step you are calibrating to the maximum absolute peak level this is quite different from the maximum peak indication of the studio meters A Calibrate while on air with normal programming Skip this s...

Страница 68: ...erial to give a clear indication of peak clipping level a Set both channels of the 464A controls as follows METER CAL 0 HF LIMIT PRE EMPHASIS set to pre emphasis of your STL if no pre emphasis set to...

Страница 69: ...l you see next GENERAL OPEN D Press the RECALL NEXT soft key E Calibrate using Tone feed a tone at your reference level to the 6200 Skip this step if you are using Program material to calibrate the 62...

Страница 70: ...level This control has no effect on the AES EBU digital input c When finished reset ST CHASSIS to yes if required e g if that was its setting prior to setting AI REF level 4 Adjust R CH BAL Right Cha...

Страница 71: ...ogramming Skip this step if you will be using the AES EBU digital input and output Continue to step 1 on page 2 30 When you are finished adjusting input output parameters repeatedly press the Escape b...

Страница 72: ...l to digital The 6200 will automatically revert to analog input if no valid input is avail able at the AES EBU input 2 Set DI MODE normal J 17 If your STL is pre emphasized with J 17 pre emphasis set...

Страница 73: ...imiter press its two TEST buttons Feed a tone through your console at the level to which you normally peak program material typically 0VU if your console uses VU meters If you are using a studio level...

Страница 74: ...alance control like those found in consumer audio products This control changes gain of the right channel only Use this control if the right analog input to the 6200 is not at exactly the same level a...

Страница 75: ...ynchronization If lock is unavailable at the SYNC INPUT or if the SYNC INPUT exceeds 4 of the selected output rate the AES EBU INPUT is used If both the SYNC INPUT and the AES EBU INPUT exceed 4 of th...

Страница 76: ...has already been correctly dithered However particularly if you use the Noise Reduction feature the processing can sometimes attenuate input dither so that it is insufficient to dither the output corr...

Страница 77: ...B Press SECURITY soft key C Press SET PASCODE soft key to access Set Pascode screen D Turn the knob until the desired number appears E Press Next button to program the next number in the pascode F Rep...

Страница 78: ...tion of each of the eight control inter faces 4 Program one or more remote control interfaces To program a given remote input hold down its associated soft key while turning the knob As you turn the c...

Страница 79: ...the Next and Prev buttons to move through the characters and use the knob to set a char acter as desired To verify the string complete the 6200 PC hardware and installation steps refer to 6200 PC Ope...

Страница 80: ......

Страница 81: ...sing 3 3 Customizing the 6200 s Sound 3 5 About the Processing Structures 3 6 Factory Programming Presets 3 7 The Protection Limiter Structure 3 13 Equalization Controls 3 16 The Two Band Structure 3...

Страница 82: ...des an escape from current screen and returns user to the next previous screen Repeatedly pressing Escape will always return you to the Idle screen Input meters show the peak input level applied to th...

Страница 83: ...Limiting increases audio density Increasing density can make loud sounds seem louder but can also result in an unattractive busier flatter or denser sound It is important to be aware of the many negat...

Страница 84: ...os Although such a signal might fall slightly short of ultimate loudness it will tend to compensate with an openness depth and punch even on small radios that cannot be obtained when the signal is exc...

Страница 85: ...etup control settings that pro vide in our opinion the most favorable trade off between loudness density and audible distortion for a given amount of processing We believe that most 6200 users will ne...

Страница 86: ...ial interesting but it is not necessary to understand it to get excel lent sound from the 6200 Fundamental Requirements High Quality Source Material and Accurate Monitoring A major potential cause of...

Страница 87: ...iter Two Band and Multi Band sec tions that follow Factory Programming Presets The presets have been named similarly to their radio counterparts in Orban s OPTIMOD FM 8200 with firmware version 3 00 a...

Страница 88: ...ts Once you have used LESS MORE save your edited preset as a User Preset Do not be afraid to experiment with presets other than the ones named for your format if you think these other presets have a m...

Страница 89: ...K NEWS TALK 5 0 SPORTS SPORTS 5 0 Table 3 1 Factory Programming Presets Radio PROTECTION The PROTECTION presets are designed for stations wanting the high est possible fidelity to the source such as a...

Страница 90: ...a compromise between ROCK and POP They have a gentle bass and treble lift along with enough presence energy to help vocals to stand out POP POP is a more conservative preset designed for a mellow open...

Страница 91: ...Preset Normal Less More TV 2B GEN PURPOSE TV 2B GEN PURPOSE 5 0 TV 2B GP NO LC TV 2B GEN PURPOSE 5 0 TV 2B FINE ARTS 2B CLASSICAL 5 0 TV LIVE NEWS TV LIVE NEWS 5 0 TV LIVE SPORTS TV LIVE SPORTS 5 0 T...

Страница 92: ...ic material It applies single ended noise reduction to the material which will reduce un wanted noise like hiss hum or stage rumble However it will also reduce ambience If the program material is care...

Страница 93: ...almost never occurs while PROTECTION 5dB sets the limiting threshold so that program material at the maximum normal input level as determined by a PPM or VU meter monitoring the input program line pr...

Страница 94: ...dulate the loudness of midrange program material a problem called spectral gain intermodulation The dual band limiter controls the level driving the following look ahead limiter Prior to the HF limite...

Страница 95: ...s to reach 100 peak modulation It will restrain sine wave modulation to a lower level typically 7dB below 100 45 modulation Therefore in its normal OPERATE mode the Protection Limiter structure will n...

Страница 96: ...tion that you set will be automatically saved in any User Preset that you create and save For example you can use a User Preset to combine an unmodified Fac tory Programming Preset with your custom eq...

Страница 97: ...gain reduction of the lowest frequency band to move quickly to the same gain reduction as its nearest neighbor when gated This fights any tendency of the lowest frequency band to develop significantly...

Страница 98: ...s With small amounts of gain reduction the effect is an actual boost in the amount of power in the pres ence region which can increase the loudness of such material substantially As you increase the g...

Страница 99: ...e sample rate without exceeding 45 Multi Band OUT Mix controls determine the relative balance of the bands in the multi band compressor Because these controls mix after the band compressors they do no...

Страница 100: ...r more processed sound Of course you can modify any preset using the LESS MORE control or using the Full Control screen and you can then store the resulting modified preset as a User Preset for future...

Страница 101: ...usic gets loud the radio blasts and distorts making the listening rather unpleasant The Two Band structure is well suited for classical formats during daytime hours when most people in the audience ar...

Страница 102: ...tween unwanted side effects as processing levels are decreased or increased If you wish you may adjust the FULL CONTROL parameters to your own taste Always start with LESS MORE to get as close to your...

Страница 103: ...musical programming which contain ambiance low level crowd noise and the like Slightly higher settings may in crease the musicality of the compression by slowing down recovery on moderate level to lo...

Страница 104: ...vent excessive reduction of dynamic range and will produce the most natural sound achievable from the Two Band structures With faster 2B REL control settings above 8dB second the sound will change sub...

Страница 105: ...ters The threshold of this clipper is ordinarily set between 4dB and 6dB below the threshold of the final limiter in the processing chain depending on the setting of the LESS MORE control in the paren...

Страница 106: ...will disagree amongst themselves by as much as 4dB when asked to assess the loudness of a piece of program material by comparison to a standardized tone or filtered noise 2dB is about as much accuracy...

Страница 107: ...s very flexible enabling you to fine tune your on air sound to complement your programming There are 21 Factory Programming Presets whose names are the same as common radio programming formats They of...

Страница 108: ...he amount of processing LESS MORE simultaneously adjusts all of the processing controls to optimize the trade offs between unwanted side effects If you wish you may adjust the FULL CONTROL parameters...

Страница 109: ...ssion gives a more dense sound particularly as the release time of the multi band compressor is sped up Moderate AGC heavy compression particularly with a fast multi band release time results in a wal...

Страница 110: ...ighest frequency bands forcing the gain of the highest frequency band to be identical to its lower neighbor and inde pendently sets the gain of the lowest frequency band according to the setting of th...

Страница 111: ...the fast multi band release time MB REL Multi Band Release control can be switched to fast mfast medium fast mslow medium slow and slow Slow produces a very punchy clean open sound that is ideal for A...

Страница 112: ...periment with this sound for music oriented programming as well However even with these set tings your sound is getting farther away from the balance and texture of the input We think that this is as...

Страница 113: ...increasing the setting of the band 5 threshold B5 THR control A number of manufacturers make all in one mi crophone processors that include de essers If you use one of these with the de esser set aggr...

Страница 114: ...never masks the noise It is probably wiser to defeat the dynamic noise reduction with this sort of material traffic reports from helicopters and the like to avoid objectionable side ef fects You must...

Страница 115: ...00 2500 3150 4000 5000 6300 8000 10000 12500 15000 LOG TONE LVL 100 0 100 1 TONE CHAN l r l r l r l r Table 3 6 Test Modes Using the 6200 for Mastering 6200 can be a useful tool for mastering applicat...

Страница 116: ...ASSICAL preset for two band processing the AGC will already be off F Unless you will be using a large amount of compression for special applications set the GATE THR to OFF G Adjust the 2B DRIVE contr...

Страница 117: ...eavy bass transients you can reduce this effect by setting the BASS CLIP to a lower level The BASS CLIP control is calibrated in dB below the final limiter threshold L Save your preset in one of 32 us...

Страница 118: ...using your favorite external equalizer before the 6200 A final limitation is lack of a convenient bypass facility for comparing processed and unprocessed sounds There are two reasonable workarounds Th...

Страница 119: ...OPTIMOD MAINTENANCE 4 1 Section 4 Maintenance Routine Maintenance 4 2 Getting Inside the Chassis 4 2 Field Audit of Performance 4 8...

Страница 120: ...s at fault The troubleshooting information in Section 5 will help you determine if the problem is with OPTIMOD DAB or is somewhere else in the station s equipment 3 Periodically check for corrosion Pa...

Страница 121: ...lay assembly to the power sup ply at jumper J202 A two wire cable connecting the display assembly to the power supply at jumper J201 b Gently lift each cable up from where it connects to its jumper so...

Страница 122: ...sembly from the unit a Remove the six rack ear screws on the sides of the unit C Remove the display boards from the front panel assembly a Remove the four nuts that secure the rear cover of the displa...

Страница 123: ...round wire with a inch nut driver E Remove the two Phillips screws and matching washers that hold the IEC connec tor to the chassis F Remove the two plugs J4 and J6 that connect the power supply board...

Страница 124: ...eplacing the Display Board Model 6200 OPTIMOD DAB Refer to step 9 to replace 6200S Display board A Set the display assembly in place so that it aligns with its mounting holes B Replace the ten gold co...

Страница 125: ...l by attaching the four nuts that secure the rear cover of the display assembly to the front panel f Reattach the six rack ear screws that mount the front panel to the main chassis B Reattach the four...

Страница 126: ...ital option or System 2 for digital tests This procedure is useful for detecting and diagnosing problems with the 6200 s perform ance It includes checks of frequency response noise and distortion perf...

Страница 127: ...Note All analog output measurements must be taken with a 600 resistor tied between pin 2 and 3 1 Prepare the unit A Use the front panel controls to set the 6200 s software controls to their default s...

Страница 128: ...tting 2 Test Digital 5 volt supply Power Supply Board A Measure the 5 volt supply with the DVM Verify the presence of 5 volts 0 25V The 5 volt digital supply appears between TP6 and ground test point...

Страница 129: ...pple and noise should not exceed 50mV 5 Check Analog Input Clip Level A Verify 6200 software controls are set to their default settings Refer to page 4 9 B Press Setup button to re access Setup menu C...

Страница 130: ...equalization but re tains MAX LPF frequency setting E Connect the oscillator to the Left Input XLR connector F Inject the Left Input XLR connector with a level of 7 3dBu with the oscillator set to 1k...

Страница 131: ...e the INPUT soft key F Press Escape then press the DIG OUT CALIB soft key G Set DO SYNC to external Press DO SYNC soft key use the control knob to select external then release the DO SYNC soft key H C...

Страница 132: ...verify sample rate lock J Disconnect the digital source generator from the 6200 10 Test Digital Transmitter Sample Rate A Verify 6200 software controls are set to their default settings Refer to page...

Страница 133: ...ency response between 30Hz and 20kHz is within 0 03dB of the reference level L Disconnect the digital source generator from the 6200 12 Check noise and distortion performance of Digital I O A Verify 6...

Страница 134: ...se floor values will be limited by smaller word lengths L Measure and verify THD N is below 0 01 from 20Hz to 20kHz 0 001 is typi cal for both audio channels M Disconnect the digital source generator...

Страница 135: ...OPTIMOD TROUBLESHOOTING 5 1 Section 5 Troubleshooting Problems and Possible 5 2 Troubleshooting IC Opamps 5 5 Technical Support 5 6 Factory Service 5 6 Shipping Instructions 5 7...

Страница 136: ...romise this control because the peak control occurs with reference to individual sample values at 48kHz The converted samples no longer have the same peak values as the 48kHz samples and some values c...

Страница 137: ...der normal operation If in an attempt to build in a safety factor or increase head room you specify a higher level than this every 1dB of extra headroom that you gain will be accompanied by a 1dB incr...

Страница 138: ...em EAS USA Standard Tones at the Legally Required Modulation Level See System Will Not Pass Line Up Tones at 100 Modulation directly above for an explanation These tones should be injected into the tr...

Страница 139: ...ect Lip Sync DTV Applications The 6200 has the ability to add delay so that the total delay through the unit is exactly one frame of various standards including 24 25 and 30 frames per second It is us...

Страница 140: ...have correctly followed installation steps operation proce dures and any appropriate troubleshooting suggestions If you are still unable to solve a problem contact our Customer Service for consultatio...

Страница 141: ...ushion ing on all sides of the unit Bubble packing sheets thick fiber blankets and the like are acceptable cushioning materials foam popcorn and crumpled newspaper are not Wrap cushioning materials ti...

Страница 142: ...5 8 TROUBLESHOOTING Orban Model 6200 This Page Intentionally Left Blank...

Страница 143: ...OPTIMOD TECHNICAL DATA 6 1 Section 6 Technical Data Specifications 6 2 Circuit Description 6 6 Parts List 6 20 Vendor Codes 6 29 Schematics Assembly Drawings 6 30 Abbreviations 6 50...

Страница 144: ...esolution 24 bit fixed point Motorola DSP56009 Input Output Resolution 20 bit limited by Analog Devices sample rate converters Peak Control Accuracy If output samples are synchronous with internal sam...

Страница 145: ...d and floating Load Impedance 600 or greater balanced or unbalanced Termination not required or recommended Output Level Control Fixed at 14 dBu peak with MON OUT source set to POST LIM iter Pre limit...

Страница 146: ...bits received from the AES EBU Input are optionally passed through to the output The 192 bit block structure is used where preamble Z indicates the start of block Jitter Less than 10ns rms RF Filterin...

Страница 147: ...rameters and user presets are stored in an E2PROM No battery is required Safety Standards ETL listed to UL standards CE marked Environmental Operating Temperature Range Model 6200 OPTIMOD DAB 32 to 12...

Страница 148: ...panel 10 segment LED meters The Input Circuits include the connectors and RF filtering for the analog and digital au dio inputs the digital sync input and the circuitry to interface these inputs to t...

Страница 149: ...detectors included in the 74HC4046 the phase frequency detector PFD is used by the 6200 The output of the phase detector pin 13 feeds the loop filter made up of resistors R607 R608 and capacitor C605...

Страница 150: ...ernally divided down to 9 216MHz to provide the Z 180 system clock frequency ROM contains control software for the Z 180 User system setup and other dynamic system state information that must survive...

Страница 151: ...e provided to other hardware For the Z 180 to read information from other hardware the Z 180 s data bus is connected at appropriate times to other hardware s source signals through tri state data buff...

Страница 152: ...tors J100 and J104 and ICs 121 and 123 IC121 and IC123 interface the RS 232 signals with the Z 180 microprocessor 2 Switch Matrix and LED Indicators Eleven front panel pushbutton switches are arranged...

Страница 153: ...input signals are each applied to a resistor load and a resistor pad The load is enabled or disabled by a jumper that is positioned by hand The loaded and padded signal is applied to a floating balan...

Страница 154: ...D samples the left and right inputs simultaneously at 128 times the 6200 sample rate of 48kHz MCLK the master clock input of the A D pin 17 is fed a 12 288MHz clock providing the 6 144MHz input sample...

Страница 155: ...input sample rates in the range of 8 5kHz MCLK 2000 to 59kHz MCLK 286 SRC_RST is an active low reset signal tied to pin 13 of the SRC This signal is controlled by the Z 180 via pin 2 of latch IC604 T...

Страница 156: ...s are used to drive the output AES EBU transmitter when an output sample rate that is synchronous to the sync input sample rate external sync is required Output Circuits This circuitry interfaces the...

Страница 157: ...onent Level Description The left channel signal emerging from the digital to analog D A converter is fil tered by IC404 A IC404 B IC406 A and associated components The purposes of these stages are to...

Страница 158: ...ter clock of 17 000MHz on pin 2 This MCLK frequency allows the output SRC to operate with an output sample rate in the range between 30kHz and 59kHz OSRC_RST is an active low reset signal tied to pin...

Страница 159: ...at 37 million instructions per second MIPS for a total of 295MIPS provide the necessary signal processing A 48kHz sampling rate is used Two of the on board serial audio interface SAI peripherals on ea...

Страница 160: ...and analog inputs These are the two input ports of the synchronous serial audio interface SAI re ceiver internal to the DSP The two serial audio streams are received simultane ously Both inputs share...

Страница 161: ...feeds the base of high current Darlington transistor Q1 The feedback circuit consisting of Q2 CR20 and R3 R7 controls the magni tude of the signal LEDPULSE so as to limit Q1 s current pulses to about...

Страница 162: ...verify resistors by their physical appearance Metal film resistors have conformally coated bodies and are identified by five color bands or a printed value They are rated at 1 8 watt 70 C 1 with a tem...

Страница 163: ...inal cost Standardized spare parts kits are also available When ordering parts from the factory please have available the following information about the parts you want Orban part number Reference des...

Страница 164: ...MANY C321 22 Ceramic 50V 20 1uF 21131 410 MUR GRM42 6Z5U104M50BD C323 24 CAP 0 0082uF 1KV 10 CER DISC 21112 282 01 C325 26 CAP 0 0030uF 1KV 10 CER DISC 21112 230 01 C400 Tantalum 35V 10 1uF 21307 510...

Страница 165: ...1000PF 29508 210 TAI STB102KB Integrated Circuits IC100 Digital Microprocessor 24822 000 ZI Z8018010VSC IC101 4 Address Decoder 24899 000 MOT MC74AC138D IC105 ASSY EPROM 6200 MAIN BD 44063 000 IC106 D...

Страница 166: ...311 RES 1 82K 1 8W 1 TF SMD1206 20123 182 01 R312 RES 3 92K 1 8W 1 TF SMD1206 20123 392 01 R313 RES 6 34K 1 8W 1 TF SMD1206 20123 634 01 R314 15 RES 10K 1 8W 1 TF SMD1206 20124 100 01 R330 RES 13 3K 1...

Страница 167: ...1 Connector XLR PC Mount Male 27053 003 NEU NC 3 MD H Y602 Oscillator 16 384MHz 28074 001 ORB ASSY EPROM 6200 MAIN BD V1 01 44063 101 DISPLAY BOARD Capacitors C1 Cap 6 8uF 25V 10 21313 568 01 Tantalum...

Страница 168: ...N4004 MANY CR12 Diode Zener 1W 5 5 6V 22004 056 MOT 1N4734A CR13 15 Diode Rectifier 22015 000 TAT SBL 1630CT CR16 Diode Zener 1W 5 5 6V 22004 056 MOT 1N4734A CR17 19 Diode Rectifier 400V 1A 22201 400...

Страница 169: ...200 43026 006 LCD GRB BCKLGHT GRY FLUID 25404 001 01 DEN HC4402FGSNG0161 PCA NRSC MON ROLL FILTR 9100B 31020 000 RECEPTACLE 2 8MMX0 5MM TAB 27746 001 01 SW ROTARY ENCODER VERT MNT 2 BIT NON DE1 26085...

Страница 170: ...6 28 TECHNICAL DATA Orban Model 6200...

Страница 171: ...ucus NJ 07094 MIL J W Miller Division Bell Industries 306 E Alondra Gardena CA 90247 MOT Motorola Semiconductor 5005 E McDowell Rd Phoenix AZ 85008 MUR Murate Erie North America 2200 Lake Park Drive S...

Страница 172: ...6200 Assembly Drawing 6 42 Display Controls Schematic 1 of 1 6 43 Display Controls Display Front 6200S Assembly Drawing 6 44 Display Controls Schematic 1 of 1 6 45 Display Controls Display Back 6200S...

Страница 173: ...OPTIMOD This Page Intentionally Left Blank...

Страница 174: ...TAL IN ANALOG IN CONVERTER A D 48kHz CONVERTER RATE SAMPLE CROSSOVER MULTIBAND LF SHELVING EQ HF PEAKING EQ MF PEAKING EQ 1800 6000Hz 520 1800Hz 100Hz 100 520Hz 6kHz COMPRESSOR COMPRESSOR COMPRESSOR C...

Страница 175: ...OPTIMOD TECHNICAL DATA 6 33 PCB ASSEMBLY MAIN 1 98 1 98 1 98 32020 000 03 1 of 1 6200 FC CB CB...

Страница 176: ...6 34 TECHNICAL DATA Orban Model 6200 SCHEMATIC CPU REMOTE RS232 1 98 1 98 1 98 62020 000 04 1 of 7 6200 FC CB CB...

Страница 177: ...OPTIMOD TECHNICAL DATA 6 35 SCHEMATIC ANALOG INPUT 1 98 1 98 1 98 62020 000 04 2 of 7 6200 FC CB CB...

Страница 178: ...6 36 TECHNICAL DATA Orban Model 6200 SCHEMATIC ANALOG OUTPUT 1 98 1 98 1 98 62020 000 04 3 of 7 6200 FC CB CB...

Страница 179: ...OPTIMOD TECHNICAL DATA 6 37 SCHEMATIC CLOCK DIGITAL I O 1 98 1 98 1 98 62020 000 04 4 of 7 6200 FC CB CB...

Страница 180: ...6 38 TECHNICAL DATA Orban Model 6200 SCHEMATIC DSP 1 1 98 1 98 1 98 62020 000 04 5 of 7 6200 FC CB CB...

Страница 181: ...OPTIMOD TECHNICAL DATA 6 39 SCHEMATIC DSP 2 1 98 1 98 1 98 62020 000 04 6 of 7 6200 FC CB CB...

Страница 182: ...6 40 TECHNICAL DATA Orban Model 6200 SCHEMATIC POWER DISTRIBUTION 1 98 1 98 1 98 62020 000 04 7 of 7 6200 FC CB CB...

Страница 183: ...OPTIMOD TECHNICAL DATA 6 41 PCA DISPLAY 6200 1 98 1 98 1 98 32016 000 01 1 of 1 6200 FC CB CB...

Страница 184: ...6 42 TECHNICAL DATA Orban Model 6200 SCHEMATIC DISPLAY 6200 1 98 1 98 1 98 62015 000 01 1 of 1 6200 FC CB CB...

Страница 185: ...OPTIMOD TECHNICAL DATA 6 43 PCA DISPLAY FRONT 6200S 1 98 1 98 1 98 32150 000 01 1 of 1 6200S SB CB CB...

Страница 186: ...6 44 TECHNICAL DATA Orban Model 6200 SCHEMATIC DISPLAY BOARD FRONT 1 98 1 98 1 98 62150 000 01 1 of 1 6200S FC CB CB...

Страница 187: ...OPTIMOD TECHNICAL DATA 6 45 PCA DISPLAY BACK 6200S 1 98 1 98 1 98 32155 000 01 1 of 1 6200S SB CB CB...

Страница 188: ...6 46 TECHNICAL DATA Orban Model 6200 SCHEMATIC DISPLAY BOARD BACK 1 98 1 98 1 98 62155 000 01 1 of 1 6200S FC CB CB...

Страница 189: ...OPTIMOD TECHNICAL DATA 6 47 ASSEMBLY DRAWING POWER SUPPLY 6200 1 98 1 98 1 98 30245 000 03 1 of 1 6200 SB SB SB...

Страница 190: ...6 48 TECHNICAL DATA Orban Model 6200 SCHEMATIC POWER SUPPLY 6200 1 98 1 98 1 98 62045 000 03 1 of 1 6200 SB SB SB...

Страница 191: ...OPTIMOD TECHNICAL DATA 6 49...

Страница 192: ...1mW applied to a specified load In audio the load is usually 600 dBu decibel voltage measurement 0dBu 0 775V RMS For this appli cation the dBm into 600 scale on voltmeters can be read as if it were ca...

Страница 193: ...de modulation PPM peak program meter RAM random access memory RC resistor capacitor REF reference RF radio frequency RFI radio frequency interference RMS root mean square ROM read only memory SC subca...

Страница 194: ......

Страница 195: ...OPTIMOD DAB TECHNICAL DATA 6 53...

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