Ross ACO-4400A, User Manual, Page: 84 / 112

6–8 • DashBoard Menu System ACO-4400A User Manual (Iss. 03)
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Manual
— The ACO-4400A will need to be manually switched from Backup to Primary
after the fault is corrected. The fault detection is “disabled”, and the user is able to
manually switch the output to be either the Primary or Backup input, irrespective of any
existing faults.
On Air
If the Changeover Mode is set to Manual, use the On Air menu to specify which SPG-4400 is on
air. There are two options: Backup is On Air and Primary is On Air.
Auto Recovery Settings
The menus in this area enable you to specify the behavior of the ACO-4400A when the primary
SRG-4400 goes off-line.
• Use the Recover Mode menu to specify the action the ACO-4400A takes when the
primary SRG-4400.
• If you selected a Recover Mode that includes a delay, use the Recover Delay in Seconds
field to specify the number of seconds (to a maximum of 86,399) to wait before applying
the Recover Mode setting.
Channels Tabs
The Channels tabs allows the user to configure each BNC channel to monitor the incoming signal
according to the selected signal type.
The number of channels displayed in this menu will be the same as that previously set in the
Number of Channels menu of the Configuration tab.
The menu displays the signal type to which each BNC channel is set to monitor. Each setting is
selected from the list of supported signal types.
All input signals are detected for amplitude. Some signal types have pre-defined fault levels
associated with them, and are used to determine whether an error has occurred. Other signal types
have a simpler “Loss Of Signal” detection system. For the special case where signals are present
but not required to be monitored for the purpose of errors, the “No Measurement” setting should
be used.
Installation Scenarios
The most common scenario is one where a specific number of signals are required to be both
monitored and switched. In this case, the
Number of Channels setting will correspond with the
same number of channels on the Channels 1-6/7-12 tabs, all set to their relevant signal types.
Another scenario is one where more signals are required to be switched than monitored. On the
ACO-4400A, when a fault occurs, ALL channels switch, regardless of how many inputs are
populated or configured. So, for this case, the user can either:
Table 6.3 Fault Actions
Fault on Switch
No fault Primary
Primary Backup
Backup Primary
Primary & Backup Backup