MV-32/64 Multiviewer
www.snellgroup.com
Introduction
Issue 1 Rev 11
Page 13
© 2014 Snell Limited
2.2.1 Powerful alarms
Alarms may be created for video sync loss, black (loss of luminance), freeze-frame,
embedded audio loss, external audio loss, over level, out of phase (of chosen pairs), teletext
loss, and closed caption loss. Audio alarms can be configured to be displayed above the
audio bars and/or in text boxes.
The colors used for on-screen alarms located above the audio bars are as follows:
•
Audio Loss: Yellow - position (left or right) indicates channel
•
Audio Over: Red - position (left or right) indicates channel
•
Anti-Phase: Cyan - middle alarm
•
Carrier Loss: White - middle alarm
If carrier loss occurs, only that alarm will flash, unless audio loss had already been active for
the same channel.
Alarms are also available for WST, OP-47 and closed caption loss.
On screen alarm indication may be a stationary or flashing colored tile border. External alarm
indication may be via the GPI I/O or the LAN/software application.
Optional triggering of SNMP traps for each alarm function or group is also supported.
Tiles have an optional color coded border to provide status indication, such as tally or alarms.
VITC loss is indicated by the burnt in VITC display flashing. Burnt in VITC is available from
SDI sources only.
2.2.2 Captions and UMDs
Captions or Under Monitor Display (UMD) information may be generated manually from a
keyboard connected to a front panel USB-2 port or automatically from remote sources via the
LAN, using browser software operating on a remote PC, or via the RS232/422 port using TSL
or other protocols. Up to two lines of UMD text can be left, centre, or right justified and may be
placed anywhere in the tile.
2.2.3 Using bitmaps
There is storage capacity (approximately 200MB) for bitmaps. These can be used as
backgrounds, or to display station idents, etc. The bitmaps must be in bmp or png file format
and can be uploaded to the frame via the LAN. Up to four bitmaps may be displayed at any
one time.
2.2.4 Keeping time
Clock/date display data can be derived from several sources; the system clock, NTP
synchronisation, LTC, or VITC from a chosen SDI input.
If there is no LTC present, the frame searches the network for an NTP Server in the nearby
region (pool.ntp.org). If a server is found, the time is taken from that.
In the absence of any clock, the system time is used. A battery on the CPU board insures that
time data is retained if the unit be powered down.
Note:
When LTC is present this source becomes the exclusive reference for clocks.
The input is balanced; to use an unbalanced LTC input, the signal must be properly
converted with a Balun in-line transformer. Grounding either of the LTC input pins will not
work.
Содержание MV-32
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