GUIDE TO INSTALLATION AND OPERATION
HCO-3901 |
29
Mode
– select between Video mode and Test mode. Use Video mode for normal operation.
Format
– choose the thumbnail size:
•
small, medium, large
Quality
– choose the quality of the displayed image
•
Poor, Normal, HiQ
Refresh Rate
– select the desired refresh rate from the pull-down box. The choices are:
[Fast, 1 sec, 2 sec, …, 9 sec, 10 sec.]
Previews Select
– choose which of the three available Preview outputs will be displayed when
Player – Preview
is
selected.
3.4.12 The Options panel
Two options are available for the HCO-3901:
•
Clean Switch Option
(HCO-3901-OPT-CS)
•
ALC Option
(HCO-3901-OPT-ALC-X)
To activate each of these options, you must
•
Obtain a licence key from Grass Valley Technologies
•
Type the licence key in the
Enter Key
box
•
Click on ENABLE OPTION to enable the option’s features.
Clean Switch Option
– allows the HCO-3901 to make a glitch-free switch between its two primary inputs IN 1 and IN
2 under certain circumstances (
note – IN 3 is not part of the clean switch process
):
1. The two inputs MUST have the same format.
2. An external reference or URS is required to run the
CSO. In this mode, the reference presence is always
reported, regardless of the user’s setting.
3. The CSO allows us to do a clean video switch between
two synchronized sources. For timing requirements
between the video sources and the reference source,
refer to the Genlock section. Switching is executed on
the proper vertical blanking interval video line according
to the format of the reference source. (refer to SMPTE
RP 168-2002: Switching point for synchronous video
switching) .
4. The switch is free of any glitches, assuming the switch is not due to loss of video or CRC errors and format or
reference mismatch are detected.
5. During a switch, the CSO performs a fade out/fade in audio switch on 200 samples to prevent any pops or
clicks (only applicable to PCM audio)
6. The following parameters and functions are not supported without the CSO.
•
Timing measurements.
•
Output timing adjustment.
•
Glitch-free switching.
Supported input signals
Reference
525 (SMPTE-259M-C)
NTSC (SMPTE-170M)
625 (SMPTE-259M-C)
PAL (ITU 624-4)
1080i50 (SMPTE-274M)
1080i50, PAL
1080i59.94 (SMPTE-274M) 1080i59.94, NTSC
720p50 (SMPTE-296M)
720p50, PAL
720p59.94 (SMPTE-296M) 720p59.94, NTSC
3G Lvl A 50/60
NTSC, PAL
ASI (EN50083-9)
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