GUIDE TO INSTALLATION AND OPERATION
HCO-3901 |
13
Auto mode operation:
•
If Input 1 fails with an alarm level of higher priority than input 2, the HCO-3901 will automatically switch over
to Input 2
•
If the Switch Mode has been set to
Switch and Return
(see below), the HCO-3901 can automatically switch
back to Input 1 if it has a lower alarm priority than input 2.
•
If the Switch Mode has been set to
Switch To
(see below), the HCO-3901 will not switch back to Input 1 even
if it has a lower alarm priority.
•
NOTE:
for certain errors, the switch-over is delayed by 0.5 second beyond the selected duration because it
often happens that the same signal is feeding both inputs, possibly offset by a frame or two. The delay
ensures that the alternate feed is indeed error-free before switching to it. The errors affected are:
o
Video error (when detection duration is 1 second or more)
o
Black detect
o
Freeze detect (when detection duration is 1 second or more)
o
Audio silence detect
Select the
Config Auto
tab to select the Auto Mode functionality:
In the
Switch Mode
box, select:
o
Switch To:
switches to the input #2 (if it is valid)
when the alarm conditions trigger a switch
o
Switch and Return:
switches to input #2 (if it is
valid) when the alarm conditions trigger a
switch, and then switches back after a
predetermined interval, counted from the time
the original input returns to a valid state. Use
the slider at the bottom of the tab to set the
interval (0 to 59 seconds, 1 to 10 minutes).
o
Toggle:
switches to the other input (if it is valid)
when the alarm conditions trigger a switch. It will stay on that input until an alarm condition appears for
that input in which case it will switch to the other input again (if it is valid).
In the
GPI Control Event
box, select whether the HCO-3901 will change to manual mode, or remain in auto
mode, when a switch is triggered from a GPI while the HCO-3901 is in auto mode.
3. Bypass
Bypass
triggers relays located on the rear panel to connect the inputs directly to the outputs. When the HCO-3901 is
in Bypass:
•
The currently selected input (IN 1 or IN2) is connected to PGM OUT
•
IN 3 is not protected by the bypass relays, and cannot appear on PGM OUT
•
The PVW (preview) outputs are disabled
•
There is no video / audio / metadata analysis
The bypassed HCO-3901 card is electrically disconnected from the Densité signal system, and can be removed from
the frame with no discontinuity in the signal path.
NOTE: Grass Valley recommends that you set the HCO-3901 in BYPASS before removing it from the Densité frame
to ensure no disruption in the signal when the card is removed and reinserted
.
The Operating Mode can also be selected using the Menu from the local control panel (see Section 3.3), and
via the GPI interface on the rear connector panel (see Section 2.2)
Figure 3.7 Configure the Auto Switch Mode
