Teledyne 6 RU Chassis, Руководство по эксплуатации

Страница: 96 / 172

96 202058 REV AA 6 RU SSPA Chassis Operations Manual
6.9 Auto Versus Manual Switching Mode
Normal operating mode for a RM SSPA in 1:2 redundant configuration is “Auto”. This
mode provides automatic detection of a SSPA fault and switchover to the operational
SSPA. The system is also protected from operator error; selecting a faulted SSPA is
not allowed. In situations when system maintenance must be performed, “Manual”
mode should be used. In “Manual” mode, the operator can select the online and
standby SSPA by pressing the
Unit 1
key. The system will not provide automatic
switchover from a faulted SSPA, but rather will keep the selected SSPA online, regard-
less of its state.
Note
: In order to function normally, all SSPAs must utilize same switch-
ing mode.
6.10 Physically Rotating Transfer Switch
It is possible to physically rotate the shaft on the transfer switch to change the online
and standby amplifiers. This can be done in either manual or automatic mode.
In “Auto” mode, the system will prevent the user from putting faulted SSPA online. On-
line SSPAs will keep trying to rotate the switch until the proper configuration is
restored.
If manual rotation is completed, the
Unit 1
LED of all system SSPA will change state to
reflect the new system configuration.
6.11 Parallel port special functions
As with any redundant mode, each SSPA chassis will change some of its parallel I/O
functions to an alternative. See
Table 5-3
for details.