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Ensemble Designs BrightEye 55, User Manual, Page: 15 / 26

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Ensemble Designs BrightEye 55 User Manual Download Page 15

TM

BrightEye 55

BrightEye 55 - Page 15

ADJUSTMENTS

Frequency Adjustment

The BrightEye 55 contains a precision timing source that is calibrated at the
factory to meet full specifications for timing precision. However, because clock
crystals shift frequency as they age, it may be necessary to adjust the frequency
of the internal source. This adjustment should not be necessary until after several
years of use.

Frequency Adjustment Procedure

Connect the BrightEye 55’s composite output to a vector scope that is externally
referenced to a known accurate source generator. With the external reference
enabled on the vectorscope, the vector display of the BrightEye 55 composite
signal will slowly rotate. 
At this point, use the BrightEye Control Application to enable 

Freq Adjust

and

adjust the frequency to bring the BrightEye 55 into spec by making the rotation
of its vector slow or stop.
The specification of ±1Hz of subcarrier (in either PAL or NTSC) is met if the
vector takes more than 1 second to make 1 full revolution.
The original factory adjustment is equal to a 

Freq Adjust

value of 0.

Summary of Contents for BrightEye 55

Page 1: ...zed into the following sections Product Overview Functional Description Applications Rear Connectors Operation Front Panel Controls and Indicators Using the BrightEye Control Application Adjustments Warranty and Factory Service Specifications Glossary TM BrightEye 55 Genlockable Sync Generator and Test Signal Generator User Guide Revision 3 1 SW v1 0 2 ENSEMBLE D E S I G N S ...

Page 2: ...ck diagram on the next page while reading this section The Ref In BNC on the rear of the unit will accept an external PAL or NTSC composite video signal as a reference If a valid reference is detected on the Ref In BNC the unit switches to this reference automatically The SDI Tri Level Sync and AES outputs will all be synchronous relative to this reference The overall vertical and horizontal timin...

Page 3: ...s such as film The module will apply the selected Tri Level Sync frame rates to specific formats and line rates as shown in the table below SD SDI Output Sync Generator Test Signal Generator Slate Text Cyclops Motion Marker Generator Audio Embedder AES Output Composite Encoder AES Formatter Tone Generator 2 Channel D to A Composite Output HD Tri Level Sync Output HD Tri Level Sync Gen 6 Hz Pulse P...

Page 4: ...der AES Formatter Tone Generator 2 Channel D to A Composite Output HD Tri Level Sync Output HD Tri Level Sync Gen 6 Hz Pulse Precision Frequency Reference External Reference Input Uses internal Precision Reference when no valid reference is detected on Ref BNC Switches to External Reference when valid reference is detected on Ref BNC BrightEye 55 Functional Block Diagram Landscape View ...

Page 5: ... moving element The Tone Generator feeds the Analog Audio outputs through a precision digital to analog converter It feeds an AES formatter to produce a standard AES output And finally it is fed to an audio embedder so that it s present in the SDI output The user selected test signal is produced in the Test Signal Gen block The test signal then passes to the Slate ID Text Generator which can overl...

Page 6: ...ty devices timed to the same house reference A number of test signals can be fed to a router switcher and other devices in a facility where genlocked timing is important As shown in the example below a BrightEye 55 is fed with the house reference to the Ref In BNC The audio tone can be embedded into the SDI timed test signal output and fed to an SDI router and switcher This allows each of the test...

Page 7: ...unit Analog reference levels can be configured from the BrightEye Control application The pinouts for the audio connector provided are shown in the diagram below To connect audio to this connector type strip the audio wire to about 3 8 8 mm Solder tinning is not required Push the wire into the opening at the bottom of the connector to seat the connection This will snap the wire into place To remov...

Page 8: ... or Mac can be used to select the desired format One of two different TLS output frame rates can be selected in the BrightEye PC or Mac Config menu 23 98 50 59 94 or 24 30 60 SDI Out The SDI Out is a BNC connector that provides test patterns or black in serial digital component format Test patterns and video standard can be selected from the front panel as well as the BrightEye Control application...

Page 9: ...C or PAL will illuminate green Ref Reference The status indicator will be green when a valid reference is present and locked Video The currently selected video pattern Black choices include Black Flat 20 Flat 80 Bars choices include 75 Bars 100 Bars SMPTE Bars Safe Safe Title Sweep choices include Sweep Mono Sweep MultiBurst Mono Burst or User chosen in BrightEye PC or Mac will illuminate green Se...

Page 10: ...ction within a given section of parameters or increases Right Arrow or decreases Left Arrow the value of a selected parameter The LED of an edited parameter will blink for 15 seconds after which time its value is stored in memory If power is interrupted before this 15 second timeout period has elapsed the edited state will not be not saved The LED indicators will report the following Std Standard ...

Page 11: ... video applications Slate This control allows the identification slate on the test signal output to be turned on and off The content of the slate can be configured in the Config menu in the BrightEye Control application Tone This control toggles the analog audio tone on and off This applies to the analog audio out the AES out and the embedded tone on the SDI out Advanced configuration of digital a...

Page 12: ...r Pattern User Pattern selects the pattern displayed when Test Pattern is set to User This pulldown lets you chose between Pathological Pulse and Bar Ramp Digital Blanking Analog Blanking Interlace Crosshatch and Unit Circle Y Cr and Cb Channels these check boxes allow you to selectively disable the output in particular luminance and color channels ID and ID Mode these pulldowns control signal ide...

Page 13: ...you choose between 18dBFS or 20dBFS Analog Ref Level select the analog audio reference level This pulldown lets you choose between 10 dB 6 dB 4 dB 0 dB or 4 dB TLS Framerate this control allows selection of the Tri Level Sync frame rate output between 23 98 50 59 94 Hz and 24 30 60 Hz Refer to the discussion of this functionality in the FUNCTIONAL DESCRIPTION at the front of this document Freq Adj...

Page 14: ...he Ref In BNC will be reported as No Ref 525 Reference or 625 Reference Ver Time set the output timing of all output signals to match the vertical timing in relation to the external reference connected to the Ref In BNC in lines Hor Time set the output timing of all output signals to match the hori zontal timing in relation to the external reference connected to the Ref In BNC in clocks ...

Page 15: ...ect the BrightEye 55 s composite output to a vector scope that is externally referenced to a known accurate source generator With the external reference enabled on the vectorscope the vector display of the BrightEye 55 composite signal will slowly rotate At this point use the BrightEye Control Application to enable Freq Adjust and adjust the frequency to bring the BrightEye 55 into spec by making ...

Page 16: ...mble or adjust factory set presets without factory autho rization Factory Service If you require service under warranty or not please contact Ensemble Designs and ask for Customer Service before you return the unit This will allow the service technician to provide any other suggestions for identifying the problem and recommend possible solutions You may also refer to the technical support section ...

Page 17: ...y and Timing Stability Internal TCX0 PAL Fsc 4 43361875 MHz 1 Hz NTSC Fsc 3 579545 MHz 1 Hz 601 Fs 27 000000 MHz 5 Hz Long Term Drift 1 ppm year Analog Jitter 1 ns Digital Jitter 0 2 UI 0 13 UI typical Serial Digital Output Number One Signal Type SMPTE 259M Return Loss 15 dB to 270 MHz Tri Level Sync Output Number One 75 1 Type 1080i SMPTE 274M 5 6 59 94 50 60 Hz 720p SMPTE 296M 2 3 59 94 50 60 Hz...

Page 18: ...Level 10 to 4 dBu adjustable General Specifications Size 5 625 W x 0 8 H x 5 5 D 143 mm x 20 mm x 140 mm including connectors Weight 15 oz Power 12 volts 4 watts 100 230 VAC modular power supply not included Temperature Range 0 to 40 C ambient Relative Humidity 0 to 95 non condensing Due to ongoing product development all specifications are subject to change ...

Page 19: ...htEye Individual Power Supply BEPS6 Spider Power Supply This powers 6 single high BrightEyes or 3 double high BrightEyes BEPS6 RP Redundant Power Supply for Spider BERKMT BrightEye Rack Mount This holds 6 single high BrightEyes or 3 double high BrightEyes or a combination BEBP BrightEye Blank Panel Single high for empty slots in Rack Mount BEAC Analog Audio Breakout Cable ...

Page 20: ...cture information is trans mitted during these times which are required in CRT displays to allow the electron beam to be repositioned for the start of the next line or field They are also used to carry synchronizing pulses which are used in transmission and recovery of the image Although some of these needs are disappearing the intervals themselves are retained for compatibility purposes They have...

Page 21: ...eferred to as chroma crawl are only the most obvious result Composite television is the most commonly used format throughout the world either as PAL or NTSC It is also referred to as Encoded video Color Difference Color Difference systems take advantage of the details of human vision We have more acuity in our black and white vision than we do in color This means that we need only the luminance in...

Page 22: ... cost effective in transmission and routing but can also add complexity to signal handling issues because the audio content can no longer be treated inde pendently of the video Frame Sync A Frame Synchronizer is used to synchronize the timing of a video signal to coincide with a timing reference usually a color black signal that is distributed throughout a facility The synchronizer accomplishes th...

Page 23: ...erence coding system that is also referred to as 4 2 2 The standard applies to both PAL and NTSC derived signals They both will result in an image that contains 720 pixels horizontally with 486 vertical pixels in NTSC and 576 vertically in PAL Both systems use a sample clock rate of 27 Mhz and are serialized at 270 Mb s Jitter Serial digital signals either video or audio are subject to the effects...

Page 24: ...equired sample rate This has the advantage of raising the Nyquist Rate the maximum frequency that can be reproduced by a given sample rate much higher than the desired passband This allows more easily realized anti alias filters PAL During the early days of color television in North America European broadcast ers developed a competing system called Phase Alternation by Line This slightly more comp...

Page 25: ... which has done tremendous work in setting standards for both the film and television industries The term SMPTE is also shorthand for one particular component video format luminance and color difference Single Mode A single mode or mono mode optical fiber carries an optical signal on a very small diameter 9 micron core surrounded with cladding The small diameter means that no internally reflected ...

Page 26: ...oltage the blanking level Unlike conventional analog sync which is bi level the proper 50 pickoff point is already identified in Tri Level Sync This contributes to lower jitter in digital systems YUV Strictly speaking YUV does not apply to component video The letters refer to the Luminance Y and the U and V encoding axes using in the PAL composite system Since the U axis is very close to the B Y a...

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