GRASS VALLEY HCO-3931 User Manual
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GRASS VALLEY HCO-3931 User Manual

12g/3g/hd change over with clean switch
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HCO-3931
12G/3G/HD Change Over with Clean Switch
User Manual
13-03066-010-AA-M00
2020-08-20

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Summary of Contents for GRASS VALLEY HCO-3931

  • Page 1 HCO-3931 12G/3G/HD Change Over with Clean Switch User Manual 13-03066-010-AA-M00 2020-08-20...
  • Page 2 Grass Valley hereby grants permission and license to owners of HCO-3931 to use their product manuals for their own internal business use. Manuals for Grass Valley products may not be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose unless specifically authorized in writing by Grass Valley.
  • Page 3 Grass Valley believes this environmental information to be correct but cannot guarantee its completeness or accuracy since it is based on data received from sources outside our company. All specifications are subject to change without notice.
  • Page 4 FCC / CFR 47:Part 15 (Class A) Federal Communications Commission Rules Part 15, Subpart B Caution to the user that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 4 | HCO-3931...
  • Page 5 EMC Performance of Cables and Connectors Grass Valley products are designed to meet or exceed the requirements of the appropriate European EMC standards. In order to achieve this performance in real installations it is essential to use cables and connectors with good EMC characteristics.

  • Page 6: Table Of Contents

    USER MANUAL Table of Contents HCO-3931 12G/3G/HD Change Over with Clean Switch and ALC ......... 7 Introduction ............................7 Features .............................. 8 Block Diagram ............................. 9 Optional ALC License ........................10 Front Card-edge Interface ......................... 10 Installation ..........................11 Installing the Rear Connector Panel ....................11 Installing the HCO-3931 Card ......................

  • Page 7: Hco-3931 12G/3G/Hd Change Over With Clean Switch And Alc

    Based on the proven Densité modular framework of over 100 cards, the flexible, space-efficient HCO-3931 is a 3 RU card and is available with a two or three slots rear panel. With flexibility to configure up to 12 HCO-3931 change-over cards per Densité...

  • Page 8: Features

    Electronic switching with two rear panels that maintain selected input upon power loss for Primary Main and Backup inputs: HCO-3931-3TRP-HR triple rear with relay backups HCO-3931-3DRP-H double rear with active bypass for a minimum of 48 hours of protection from a power loss ...

  • Page 9: Block Diagram

    1.2.1 Supported Video Formats The HCO-3931 supports the following video formats.  Figure 1 Supported Video Formats Block Diagram The following block diagrams show the functionality of the HCO-3931.  Figure 2 Functional Block Diagram - HCO-3931 HCO-3931 | 9...

  • Page 10: Optional Alc License

    USER MANUAL Optional ALC License 16-channel on-board Audio Loudness Control (ALC) processing can be enabled with the HCO-3931-OPT-ALC license. Front Card-edge Interface The front card-edge of the HCO-3931 incorporates two elements: Select  Status LED (see section 3.2) Status ...

  • Page 11: Installation

    Each Grass Valley Densité-series card is associated with a rear connector panel, which must be installed in the Densité frame before the card can be inserted. The HCO-3931 and its associated rear connector rear panel must be mounted in a Densité-3 or Densité-3+ series frame. The following rear connector panels are available: ...

  • Page 12: Rear Connector Panels

    Rear Connector Panels 2.3.1 Image of the Rear Connector Panel The rear connector panel is shown below. HCO-3931-3DRP-H – Double-width Densité-3 rear HD- HCO-3931-3TRP-HR – Triple-width Densité-3 rear HD- DIN connectors. This active rear features an electronic- DIN connectors. This passive rear features a hardware-...

  • Page 13: Summary Of Rear Panel Connections

    Electronic Bypass Latching Relay (minimum 48 hour retention) CONNECTORS HD-BNC HD-BNC   REF IN   12G/3G/HD IN MAIN, BACKUP, EMERG 1, EMERG 2   12G/3G/HD OUT PGM A, PGM B, PVW A, PVW B CONNECTORS HD15 HD15   GPIO HCO-3931 | 13...

  • Page 14: Details Of Rear Panel Connections

    Connect up to four serial digital video signals (MAIN, BACKUP and two emergency (EMERG 1 & EMERG 2) inputs), conforming to the SMPTE ST 2082-10 standard for 12Gbps signals, SMPTE 292M standard for HD input signals, or SMPTE-425M for 3Gbps signals, to the BNCs labeled 12G/3G/HD SDI IN. The HCO-3931 will automatically switch to the detected line format.
  • Page 15 For 50 fps: 625 (ITU 624-4 PAL black burst) GPIO Connector The rear panels of the HCO-3931 include a GPIO interface that allows control of the switch process. When connecting the HCO-3931 to an automation system, be aware of the following: The HCO-3931 card senses the presence of an external power supply voltage on the GPIO input.
  • Page 16 GPI-OUT-AUTO GPI-IN-PWR 13,14 Note: You may find it convenient to purchase Grass Valley’s NSH15M HD15-to-terminal-block adapter, which provides easy access to the GPIO pins. Using the GPIO interface  Trigger the GPI-IN-MAIN, GPI-IN-BACKUP, GPI-IN-EMERGENCY1, or GPI-IN-EMERGENCY2 pin to select that input.

  • Page 17: Operation

    Card-Edge Status LED The status monitor LED is located on the front card-edge of the HCO-3931, and is visible through the front access door of the DENSITÉ-3 frame. This multi-color LED indicates the status of the HCO-3931 by color, and by flashing/steady illumination.

  • Page 18: Local Control Using The Densité Frame Control Panel

    The panel consists of a display capable of displaying two lines of text, each 16 characters in length, and four pushbuttons. The functionality of the pushbuttons is as follows: [+] [–] Used for menu navigation and value modification 18 | HCO-3931...

  • Page 19: Remote Control Using Icontrol

    Touch-screen panel: In the home screen, touch the virtual button corresponding to this HCO-3931. The STATUS LED on the HCO-3931 flashes yellow, and the touch-screen status shows yellow for the HCO-3931. Use the control panel buttons to navigate through the menu, as described above.

  • Page 20: The Icontrol Graphic Interface Window

    USER MANUAL 3.4.1 The iControl graphic interface window The basic window structure for the HCO-3931 is shown in Figure 6. The window identification line gives the card type (HCO-3931) and the slot number where the card installed in its Densité frame.
  • Page 21 3. At the bottom are the controls for the User presets. 4. This section contains the main operating controls and displays for managing the HCO-3931’s feature set. The contents are selected by clicking a button on the left-hand side of the screen.

  • Page 22: The Switch Control Panel

    USER MANUAL 3.4.2 The Switch Control panel The HCO-3931 has three modes of switch operation, selected from the buttons in the Switch Control panel. Clean switching is enabled by selecting the Clean Switch Enabled checkbox. This activates the Timing panel, where the clean switch timing requirements can be set up.
  • Page 23 Auto switch uses signal analysis probes to determine whether the best input to be selected. Figure 9  Automatic Switch Mode Click the Automatic mode button to set this mode. The automatic operating mode parameters are shown above. HCO-3931 | 23...
  • Page 24 2. A countdown (from 10 seconds) underneath the Take button shows how long the Take button will remain active before it times out. 3. Click the Take button while it is active to switch the HCO-3931 output over to the other source. 24 | HCO-3931...
  • Page 25 NOTE: Grass Valley recommends that you set the HCO-3931 in BYPASS mode before removing it from the Densité frame to ensure no disruption in the signal when the card is removed and reinserted.

  • Page 26: The Probes Panel

    3.4.3 The Probes Panel The HCO-3931 continuously monitors the condition and status of the input signals it is processing. The information is used to decide whether the input must be switched in Auto mode. It is also used to flag the status of the card in the iControl system.
  • Page 27 This is the signal connected to the BACKUP input on the rear panel. BACKUP EMERGENCY This is the signal connected to the EMER 1 input on the rear panel. EMERGENCY This is the signal connected to the EMER 2 input on the rear panel. HCO-3931 | 27...
  • Page 28 Clear Duration Set the amount of time that the signal must be restored before the probe is reset. See also the description for the specific probe for more information. 28 | HCO-3931...
  • Page 29 In AUTO MODE, if switching is not desired when Input MAIN changes video format, set the Duration to at least 0.5 seconds See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. HCO-3931 | 29...
  • Page 30 Use the slider to set the number of signal errors allowed over a 1s window before the probe is triggered. See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. 30 | HCO-3931...
  • Page 31 Sets the time interval during which a non-black signal must be continuously detected before a (sec) previously-flagged Black error will be cleared. See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. HCO-3931 | 31...
  • Page 32 Sets the time interval during which an active signal must be continuously detected before a (sec) previously-flagged Freeze error will be cleared. See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. 32 | HCO-3931...
  • Page 33 Figure 17  Probes panel, Video Tab, Format Mismatch Probe Property Description Expected Set the expected format for each input. format See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. HCO-3931 | 33...
  • Page 34 This probe detects if there is a difference between the input video format’s frame rate and the reference format’s frame rate. Figure 18  Probes panel, Video Tab, Reference Mismatch Probe See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. 34 | HCO-3931...
  • Page 35 Duration (sec) Set the time interval over which loss of audio must be continuously detected before the error is flagged. See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. HCO-3931 | 35...
  • Page 36 Sets the time interval over which silence must be continuously detected before the error is flagged. Note: This probe works with PCM audio only. See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters. 36 | HCO-3931...
  • Page 37 MAIN settings Apply to EMERGENCY 2: Make all EMERGENCY 2 probe parameters match those of the configuration for MAIN. The HCO-3931 card senses the presence of an external power supply voltage on the GPIO input. Connector When Enable GPI Connector Power Monitoring is set, any voltage greater than 1 V will silence the GPI Connector Power alarm, when this alarm is enabled.

  • Page 38: The Switch Configuration Panel

    1, whereas an input with a high level of imparment has a weight of 0.2. The following weighting table shows the permutations of this weighting scheme. Input MAIN BACKUP EMERGENCY1 EMERGENCY2 Weight Impairment Weight None 0.45 33.75 22.5 High Figure 22  Auto-Switch Weighting Table 38 | HCO-3931...
  • Page 39 Switch and enter Manual mode: Following a switchover caused by a GPIO input, the card Switch Event enters manual mode. Switch and remain in Automatic mode: Following a switchover caused by a GPIO input, the card remains in automatic mode. HCO-3931 | 39...
  • Page 40 Bypass to MAIN: The input at MAIN is sent to the PGM A output. Emergency Inputs Bypass to best between MAIN and BACKUP: Either input MAIN or BACKUP, with the least impairment, is sent to the PGM A output. 40 | HCO-3931...

  • Page 41: The Preview Configuration Panel

    That is, the second best impairment rating according in real time according to the card’s automatic switchover calculation based on Figure 22 on page 38. Note that the preview outputs always use the SDI input being observed as the reference source. HCO-3931 | 41...

  • Page 42: The Timing Panel

    (within the green REF area), the timing measurement will remain green. If not, the measurement will turn red (take corrective actions such as changing the PROGRAM Timing setting). Figure 25  Timing panel Property Description PROGRAM Use the Vertical pulldown to offset the output from the reference by a number of video lines. Timing 42 | HCO-3931...

  • Page 43: The Reference Panel

    3.4.7 The Reference panel The HCO-3931 output signals should always be genlocked to some reference source. The genlock source is selected in the Reference panel. The genlock is used to assure a switch during the vertical interval of the genlock source.
  • Page 44 See the Timing panel (section 3.4.4) for a display of the measured timing between the outputs and the reference, and to set the output timing. Note that the card de-activates clean switch (even if enabled in the current configuration) whenever using an SDI input as a reference source. 44 | HCO-3931...

  • Page 45: The Alc Panel

    Minimizing loudness differences between segments in a playout channel is an important issue in a world where multiple programs originating in different formats from different sources must be integrated seamlessly. The Automatic Loudness Control (ALC) option is the solution to this need. It uses Grass Valley’s proprietary wideband ALC algorithm.
  • Page 46 “sliding-window”, which is equivalent to the Short-term mode in Dolby’s LM100 loudness meter. Dynamic and ALC regulation corrections are always given in dB. Each correction meter is integrated over a period of 250 milliseconds. 46 | HCO-3931...
  • Page 47 Attack Time: Set the input compressor’s attack time. This specifies how fast the compressor will reduce the gain. Release Time: Set the input compressor’s release time. This specifies how fast the compressor will increase the gain after a compression. HCO-3931 | 47...
  • Page 48 Transient Mode Threshold, loudness is reduced following the rate set by the Speed pull-down. When the input loudness is under the Transient Mode Threshold, loudness is increased, again following the Speed pull-down, which ranges from Slow (up to 15 seconds) to Fast (up to 4 seconds). 48 | HCO-3931...
  • Page 49 Transient Fast Transient ALC Response Time Response Freeze Response Time Time Time Time Time INPUT Limiter Threshold Fast Mode Threshold Transient Threshold Output Target OUTPUT Transient Threshold Gate Threshold Figure 29  GV ALC panel, PGM tab HCO-3931 | 49...

  • Page 50: Test Panel

    HLG BT.2110-0: Test pattern HLG narrow range as per ITU-R BT.2111-0  PQ Narrow BT.2111-0: Test pattern PQ narrow range as per ITU-R BT.2111-0  PQ Full BT 2111-0: Test pattern PQ full range as per ITU-R BT.2110-0 50 | HCO-3931...
  • Page 51 USER MANUAL Status When Test mode is activated on a channel, the status icon display for that channel will show the Color Bars&Tone icon. Test Pattern Operating Mode Icon Enabled Color Bars&Tone Disabled Process HCO-3931 | 51...

  • Page 52: The Factory Panel

     Figure 31 Factory/Presets Panel At the bottom left of the window, the Current Preset field displays the presets that are currently used on the HCO-3931 application. Possible values are:  Factory default  User defined presets (for example, USER 1) ...

  • Page 53: User Presets

    Select any one of the five presets using the Card Preset Select pulldown menu. Click Load to load the contents of the selected user preset into the HCO-3931 application. All parameter settings and values will be replaced by the contents of the selected user preset.

  • Page 54: Load Factory Button

    Profile Copy for Card Copy profile from This line shows the HCO-3931 card and its App. server, Densité frame, slot number, card type, firmware version and profile. The Profile column has a pulldown menu that allows you to select from the following options:...
  • Page 55 Note: It is a good idea to create a folder for these files, because they are not explicitly identified as HCO-3931 profiles and will be difficult to identify if not clearly named and conveniently located.
  • Page 56 The Profile column shows the same setting as selected for the current card in the Copy profile from line. See Figure The Select column includes a checkbox to identify the HCO-3931 cards to which profiles will be copied from the current card.

  • Page 57: Alarm Config Panel

    USER MANUAL Alarm Config Panel This panel is used to configure the alarm reporting of the HCO-3931 application. The panel opens in a new window when the button is clicked and can be resized.  Figure 39 Alarm Configuration Status/Name This column contains an expandable tree listing all the alarms reported by this HCO-3931 card.
  • Page 58 Card LED alarm will be forced to be Disabled. A warning dialog box will open to ask you to confirm the action, since it will change the configuration and cannot be undone.  Figure 40 Warning for Follow LED Change 58 | HCO-3931...
  • Page 59 Copy to other cards Click this button to open a panel that is used to copy the alarm configuration set for this card to another HCO-3931 card.  Select one or more destination cards from the list in the window by checking the boxes, or check All to select them all.

  • Page 60: Information Panel

    Information Panel When the HCO-3931 is included in an iControl environment, certain information about the card should be available to the iControl system. You can enter labels and comments that will make this card easy to identify in a complex setup.
  • Page 61 USER MANUAL  Advanced…: Shows the Long ID for this card. The Long ID is the address of this HCO-3931 application on the iControl network.  Figure 45 Advanced Window HCO-3931 | 61...

  • Page 62: Specifications

    >35 dB up to 5.75 MHz GPIO (10) Connector HD-15, opto-isolated, common ground GPIO IN (5) Contact closure to ground GPIO OUT (5) Contact closure to ground External pull up voltage 3.3V to 24V max. External GPIO power 5V nominal 62 | HCO-3931...
  • Page 63 20-24 bits Sampling: 48 kHz, synchronous Number of channels 16, 4 groups Audio latency 1.8 ms without Clean Switch and ALC enabled Add 42 µs if Clean Switch is enabled Add 21 µs if ALC is enabled Electrical Power 15W maximum HCO-3931 | 63...

  • Page 64: Contact Us

    USER MANUAL 5 Contact Us Grass Valley Technical Support For technical assistance, contact our international support center, at 1-800-547-8949 (US and Canada) or +1 530 478 4148. To obtain a local phone number for the support center nearest you, please consult the Contact Us section of Grass Valley’s website (www.grassvalley.com).

  • Page 65: Annex 1 - Hco-3931 User Interface

    USER MANUAL ANNEX 1 – HCO-3931 User Interface STATUS REAR TYPE / EXT REF PRESENCE / URS PRESENCE / SELECTEED INPUT / GENERAL STATUS OPERATING MODE INPUT FORMAT / NO VIDEO / VIDEO ERROR / MAIN STATUS MAIN VIDEO STATUS...

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