GUIDE TO INSTALLATION AND OPERATION
HCO-3901 |
1
1 HCO-3901 3G/HD/SD/ASI Change Over with Clean Switch and ALC
1.1 Introduction
The HCO-3901 from Grass Valley, a Belden Brand, is a 3x1 3G/HD/SD/ASI change-over which support 16 channels
of embedded audio and metadata. The module can perform a video and audio “Clean and Silent Switch” between
sources using the CS option (not available with ASI signals). In the event of a power failure, the PGM signal is
protected by relays fitted on the rear module, maintaining the integrity of the selected signal at the output. Those
protection relays are fully controllable via GPI. With the addition of the HCO- 3901-3DRP-R-EX rear panel, the HCO
now supports paired outputs for 3G/HD/SD SDI (single outputs only for ASI).
Input selection can be performed automatically or manually.
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In automatic mode, the card will perform input selection between IN 1 and IN 2 based on internal signal analysis
with alarm parameters, and the status of the inputs.
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In manual mode, any three sources can be selected:
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from the Densité controller
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using the iControl software
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or simply by using a GPI input (3DRP rear only).
A GPI input can be triggered by an automation system or any simple GPI control panel.
The GPI outputs allow tallies to give status of the selected source.
The HCO-3901 provides up to eight 3G/HD/SD SDI video outputs (depending on the rear panel in use). The preview
outputs are user selectable to follow the main program output, video inputs IN 1, IN 2 or IN 3.
The HCO-3901 generates audio/video fingerprints for input 1 and input 2. 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 automatic loudness control (ALC) option can eliminate objectionable loudness variations between
programs and commercials (not available with ASI signals).
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-3901 is a 3 RU card and is available with a one or two slot rear module. Up to 20 modules can fit in a 3 RU
Densité frame with a 1-slot rear module (or 19 with REF-1801).
1.2 Features
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Two Primary inputs: IN 1 & IN 2 plus one Secondary: IN 3
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Four Outputs: One Main Program plus three previews
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Eight outputs (with EX rear): paired outputs for Main Program and each of the three previews (single outputs only
for ASI)
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Supports 3G, HD (1080i50/59.94, 720p50/59.94) and SD (525, 625) or ASI input and output
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Electronic switching with relay backup (on rear module) maintains selected input with power loss for Primary
inputs IN 1 and IN 2
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Automatic mode using internal signal analysis with alarm parameters for IN 1 and IN 2
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Manual change-over by local frame controller, iControl, iControl Solo or GPI (3DRP rear) for 3 inputs
