Teledyne HPAC-2005, Руководство по эксплуатации

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3 RU SSPA Chassis Operations Manual 205356 REV T 57
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3.Keep Alive
— The Keep Alive setting disables the automatic mute
function when a module enters a fault condition. This option may be ben-
eficial in systems where the N+1 option is used only as a convenient sin-
gle point of control, rather than as a redundancy control measure. Con-
sult the factory on the use of this option.
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4.Flex Gain
— Flex Gain is a form of automatic gain control for N+1 sys-
tems. This control option has the same basic operation principles as the
standard Auto Gain option except that the gain reserves and amount of
gain compensation differ. This setting is designed to serve the special
gain compensation needs of hybrid PowerMAX SSPA systems.
When Flex Gain mode is enabled, the Master unit of the PowerMAX sys-
tem automatically reserves a predetermined amount of attenuation to
each amplifier in the system and reduces overall system gain. In case of
one or more amplifier unit failures, the system will return a certain amount
of reserved gain in order to compensate system gain degradation from
the failed unit(s).
In the case of hybrid 4- and 2-way modes, the Master unit monitors the
amplifiers placed in standby mode and provides the proper amount of
gain compensation for these system configurations.
2.2.6.6.4 N+1 Info
When selected, the menu shown in
Figure 2-14
is displayed and used for N+1 system
troubleshooting.
Note:
The values shown do not indicate the current system state, but
instead offer a history of any fault occurrences.
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Last Fault/Ticks
— Shows different information for Master and Slave
units. On the Master unit, it displays the unit address of the last detected
fault in the N+1 system. If the display shows “000”, that indicates no fault
instances since the unit assumed its Master state. On Slave units, the
value displayed is the number of system clock ticks remaining since the
last Master unit call. The Slave unit will assume Master state when the
tick count reaches 0.
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Fault Cause
— Master unit only. Displays the cause for the last detected
N+1 unit fault. Possible values include “None,” for no faults; “Timeout,” if
a Slave unit fails to respond to a Master request for three (3) consecutive
queries; or “Summary,” if a unit exhibited a Summary fault.
Figure 2-14: N+1 Info Menu
LastFault/Ticks: XX
Fault Cause: XXXXXX