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Miranda ASD-231i, Инструкция по установке и эксплуатации

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1 

1   ASD-231i NTSC/PAL to 4:2:2 Adaptive Decoder with TBC

 

 
 

1.1   Introduction

 

 

The ASD-231i is a multi-standard, fully digital, 12-bit decoder with 3D and 2D adaptive decoding 
capabilities allowing optimal picture quality with virtually no cross-color or cross-luma artifacts. A 
built-in Time-Base Corrector (TBC) supports unstable (VHS) inputs. The TBC mode offers an 
auto decoding filter selection which automatically switches between comb and bandsplit filtering 
on the luminance path only. 
 
The ASD-231i offers the possibility of connecting a reference input for complete studio 
integration;  it synchronizes serial 4:2:2 video to a local reference input. If no external reference is 
detected, the ASD-231i locks on to the composite input.    
 
If the input signal degrades or disappears, the ASD-231i can be set to freeze on the last error-
free field, switch to black, or disable the output 4:2:2 signals. 
 
For those audio users requiring video delay tracking, a video processing delay signal provides 
the ASD-231i input-output delay at all times.  
 
The ASD-231i, with its built-in frame synchronizer and Automatic Gain Control supports stable, 
unstable, and satellite inputs. All four 4:2:2 serial digital video signals respect the SMPTE 259M-
C standard.  Also, the serial digital video outputs carry EDH data according to the SMPTE RP165 
standard.  Additionnally, the ASD-231i has a built-in color bars test signal. 
 
The ASD-231i is a member of the 

imaging

 family of digital video modules and therefore requires 

the 

imaging

 Quartet, 

imaging

 Symphonie, or 

imaging

 Solo frame for mounting and power. 

 
 

 

 

 

 

 

 

 

 

Figure 1.1

   ASD-231i Block Diagram 

 
 

 

 

 

 

 

 

 

 

 

 
 
 
1.2   Features

 

 

•

  NTSC, PAL, PAL-M, PAL-N, and SECAM composite inputs supported with passive loop-through 

•

  Automatic or forced detection of composite input 

•

  Analog reference input supported for complete studio timing 

•

  Unstable (VCR) sources supported 

2

3

COMPOSITE

IN

4

4:2:2 OUT

REMOTE CONTROL

Microcontroller

Genlock

Frame

Sync/
Delay

Adaptive

Decoder

EDH

REF IN

Genlock

Adaptive

TBC

1

DELAY

12-Bit

ADC

Содержание ASD-231i

Страница 1: ...to Installation and Operation M212 0900 101 Copyright 2002 MirandaTechnologies Inc Specifications may be subject to change Printed in Canada August 2002 ASD 231i imaging Series Miranda Technologies inc 3499 Douglas Floreani St Laurent Québec Canada H4S 2C6 ...

Страница 2: ...st clearly describing the items and stating the date of shipment Repaired parts or products will be shipped to the Buyer with a similar packing list In the case of exchange the defective products or parts must be returned to Miranda within fifteen 15 days from receipt by the customer of the exchange product In the case of a loaner the loaned products or parts must be returned to Miranda within fif...

Страница 3: ...92 incorporating A1 A2 A3 A4 and A11 European Standard Safety of Information Technology equipment Electromagnetic Compatibility This equipment has been tested for verification of compliance with FCC Part 15 Subpart B class A requirements for Digital Devices This equipment complies with the requirements of EN55022 Class A Electromagnetic Emissions En 61000 3 2 Disturbance in Supply Systems and EN55...

Страница 4: ...231i Electrical Installation 6 3 Operation 9 3 1 ASD 231i User Interface 9 3 2 Menu Introduction 9 3 3 Input Status Monitoring 12 3 4 Source Type Selection 12 3 5 Input Format Selection 12 3 6 Decoding Filter 13 3 7 Timing 13 3 7 1 Vertical Timing 14 3 7 2 Horizontal Timing 14 3 8 Gain 14 3 8 1 Brightness 14 3 8 2 Saturation 15 3 8 3 Overall Gain 15 3 9 Setup 16 3 10 Hue 16 3 11 Freeze Selection 1...

Страница 5: ...se audio users requiring video delay tracking a video processing delay signal provides the ASD 231i input output delay at all times The ASD 231i with its built in frame synchronizer and Automatic Gain Control supports stable unstable and satellite inputs All four 4 2 2 serial digital video signals respect the SMPTE 259M C standard Also the serial digital video outputs carry EDH data according to t...

Страница 6: ...in frame synchronizer Built in Automatic Gain Control AGC Adaptive Time Base Corrector automatic selection of 2D comb or bandsplit filtering on Y channel 2X oversampling 3D adaptive decoding True PAL decoding Video processing delay signal EDH insertion Built in test signal ...

Страница 7: ...lockwise Pull on the handles 2 Select an empty slot 3 Carefully place the ASD 231i between a set of module guides and gently push the module towards the rear of the frame until the module s edge connector is secured to the backplane Pull lightly on the module verifying that it does not move 4 Replace the frame s front panel Make sure to rotate the thumb screws clockwise in order to secure it to th...

Страница 8: ...i These labels are to be installed on the frames rear panel in order to identify the module s external connectors 2 3 1 imaging Quartet Series Solo Frames To install the Quartet Quartet C Quartet M Quartet M A75 Quartet M A110 Solo label follow these steps while referring to Figure 2 1 1 Remove the screws associated with the ASD 231i connectors 2 Carefully apply the label to the connectors 3 Repla...

Страница 9: ...honie s rear panel locate the appropriate connectors 2 Remove the rear label mounting screws from the rear module 3 Carefully apply the label to the connectors making sure the label s text is read from top to bottom 4 Replace the screws making sure not to damage the label Figure 2 2 Symphonie rear panel label installation ...

Страница 10: ...IN The ASD 231i accepts SMPTE 170M PAL ITU 624 4 or 2 Vpp 4 Vpp composite sync reference signals Refer to Figure 2 2 When using the Quartet Quartet C Solo or Symphonie R C the ASD 231i provides a loop through output of the studio reference signal Make sure to terminate this output with a 75 ohms terminator when it is not being used A valid analog composite reference signal will turn on the REF ind...

Страница 11: ...ference or black input Reference loop through output Analog composite input NTSC PAL PAL M PAL N SECAM loop through output COMPOSITE IN 4 2 2 OUT ASD 231i NTSC PAL TO 4 2 2 DECODER WITH TBC REF IN 1 2 3 4 DELAY Quartet M Quartet M A75 Quartet M A110 Symphonie R M COMPOSITE IN 4 2 2 OUT ASD 231i NTSC PAL TO 4 2 2 DECODER WITH TBC REF IN 1 2 3 4 Quartet Quartet C Solo Symphonie R C Composite loop th...

Страница 12: ...8 ...

Страница 13: ...tup hue freeze mode vertical ancillary mode CC true PAL filtering and factory reset Each menu is described throughout this section The following items should be remembered when accessing the menu Normal Mode When the menu is not being accessed we refer to this as normal mode When in normal mode the current format loaded by the ASD 231i is displayed and the display is dimmed Navigating Through the ...

Страница 14: ...er the desired setup has been set press SELECT The menu returns to STUP and the new setup value is stored for the current format ESC If ESC is pressed after making changes to a parameter the parameter is reset to the value it had prior to the change For example after changing the brightness press ESC The menu is returned to BRI and the previous brightness gain is reloaded Automatic Exit From Menu ...

Страница 15: ...0 0 500 step 1 E SAT S E 500 0 500 step 1 E ALL S E VAR NOM VAR VAR E STUP S E 15 7 5 15 0 step 0 20 unit IRE NTSC 105 0 105 step 1 25 unit mV PAL M 107 0 107 step 1 28 unit mV PAL PAL N SECAM E HUE S E 180 0 180 step 0 25 unit DEG NTSC Studio NTSC Satellite 180 0 180 step 1 50 unit DEG NTSC VCR only E FRZE S E FLD BLAK KILL OFF Not accessible during Studio with no ref E VANC S E PROC S E BLNK DEC...

Страница 16: ...the input modes can only be made when in normal mode Therefore make sure you have left the menu Press the DOWN push button to scan through the available selections The selected source type turns on the appropriate LED N B There is no STUDIO option available during SECAM operation 3 5 Input Format Detection The ASD 231i supports two modes of format detection automatic input format detection and for...

Страница 17: ... 5 types of decoding filters which are listed in Table 3 1 The selection of a decoding filter will depend highly on the nature of the input composite signal For example choosing between A 3D and A 2D will depend highly on the content of your source Most artifacts will disappear with A 3D but a ghosting effect may appear with moving images On the other hand A 2D may be more adept with fast moving i...

Страница 18: ... Note Vertical timing is not available when using SATELLITE or VCR source types and when no reference signal is detected When operating in Frame Buffer Frame Delay mode Studio source type w o reference signal the minimum vertical timing adjustment value changes with the number of processing steps selected Table 3 2 shows the minimum values for different processing selections Table 3 2 Minimum Vert...

Страница 19: ... to set the required brightness gain level For a quicker response keep the push button depressed Press UP and DOWN simultaneously for unity gain 6 Press SELECT to store the new gain level for the current format BRI is displayed 7 Press ESCAPE to return to GAIN 8 To return to normal mode press ESCAPE 3 8 2 Saturation Follow these steps in order to set the saturation gain level 1 Press SELECT to ent...

Страница 20: ...to the setup present on the input signal Follow these steps in order to set the setup 1 Press SELECT to enter the menu FRMT is displayed 2 Press the DOWN push button until STUP is displayed 3 Press SELECT to enable the setup menu The current setup in IRE units for NTSC signals or mV for all PAL and SECAM signals is displayed 4 Press UP or DOWN to set the required setup For a faster response keep t...

Страница 21: ...Press SELECT to enter the freeze menu The current freeze mode selection is displayed 4 Press the UP or DOWN push button to display the desired freeze mode If you wish to disable the freeze function set the freeze menu to OFF 5 Press SELECT to store the new freeze mode FRZE is displayed 6 To return to normal mode press ESCAPE Note During Studio source type operation without a reference Freeze is fo...

Страница 22: ...ay affect the closed captioning content on the output signal to prevent any degradation the module allows line 21 to pass through without being affected by the decoding filter To select closed captioning pass through follow these steps 1 Press SELECT to enter the menu FRMT is displayed 2 Press the DOWN push button until CC is displayed 3 Press SELECT to enter the CC menu The current setting is dis...

Страница 23: ...the default parameter values are currently being restored Once they are restored the ASD 231i returns to normal mode Note Parameters are restored for all formats Table 3 6 Default parameter values appears as underlined in Figure 3 2 Function Default Selection Source Type STUDIO Format AUTO Decoding filter A 2D STUDIO SATELLITE source type AUTO VCR source type Vertical timing 0 LINE Horizontal timi...

Страница 24: ...20 3 To disable the color bar generator press TEST when in normal mode ...

Страница 25: ... to all formats Table 4 1 Stored parameters NTSC PAL PAL M PAL N SECAM Studio Satellite VCR Studio Satellite VCR Studio Satellite VCR Studio Satellite VCR Studio Satellite VCR Source type Format Decoding filter Vertical timing Horizontal timing Gain brightness Gain saturation Setup Hue Freeze VANC process VANC setup CC TruePAL Different values stored for no reference and with reference ...

Страница 26: ...22 ...

Страница 27: ...te sync Return loss 35 dB up to 5 75 MHz Output 4 2 2 Out Signal 4 4 2 2 SMPTE 259M C 270 Mbps Return loss 15 dB up to 270 MHz Jitter wideband 0 2 UI 0 74ns pp Video Delay Signal Differential signal Miranda proprietary video delay tracking pulse Processing Performance Quantization 12 bits Sampling 27 MHz 2X oversampling Frequency response 0 1 dB up to 5 75 MHz Noise unweighted 59 dB up to 5 75 MHz...

Страница 28: ...24 ...

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