GUIDE TO INSTALLATION AND OPERATION
HCO-1822 |
1
1 HCO-1822 HD/SD/ASI Change Over with Clean Switch and ALC
1.1 Introduction
The HCO-1822 is a 2x1 HD/SD/ASI change-over which supports 16 channels of embedded audio and Metadata.
Change-overs are performed electronically by the HCO-1822’s internal router. The module can perform a video and
audio “Clean & Silent Switch” between sources using the CS option. In the event of a power failure, the signal is
protected by relays fitted on the rear module, maintaining the integrity of the selected signal at the output. Relays are
fully controllable via the GPI interface.
Input selection can be performed automatically or manually. In automatic mode, the card will perform input selection
based on internal signal analysis with alarm parameters, and the status of the inputs. In manual mode, channel
selection can be undertaken from the Densité Controller, the iControl software, or simply by using a GPI. A GPI can
be connected to an automation system or any simple GPI control panel. The GPI outputs give status of the selected
source allowing tallys to be triggered.
The preview output is user-selectable to follow the main program output or any of the video inputs.
The HCO-1822 generates audio/video fingerprints for each of the different inputs. In combination with other cards
streaming fingerprints for the same signals, an optional module in iControl can measure and report lip-sync errors
through the entire chain of a broadcast facility.
Grass Valley’s new Automatic Loudness Control (ALC) option can eliminate annoying loudness variations between
programs and commercials. Up to 4 programs of 8 channels can be configured to provide independent loudness
control.
The module provides streaming video and audio level metering so an operator can remotely and effectively monitor
the signal path using Grass Valley’s iControl facility monitoring and control system.
The HCO-1822 is a 2RU card that fits a 2-slot rear module. Up to 10 modules can fit in a 2RU densité frame.
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1.2 Features
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Two source inputs and two outputs: program and preview
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Supports HD (1080i50/59.94, 720p50/59.94), SD (525,625) or ASI input
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Electronic switching with relay back up (on rear module) maintains selected input with power loss
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Automatic mode using internal signal analysis with alarm parameters
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Manual change-over by local frame controller, iControl, iControl Solo or GPI
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Alarm reporting to iControl facility monitoring and control system
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Compatible with iControl end-to-end A/V fingerprint analyzer for lip-sync error detection and measurement
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GPI in & out (IN 1, IN 2, AUTO, BYPASS)
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Optional clean switch function (video and 16 channels of audio)
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Optional on-board Automatic Loudness Control by Grass Valley
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Reference input with passive loop-through
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Two line timing window with CS option
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Thumbnail and audio level meter streaming
