Grass Valley 8972PX User Manual
Page 25
8972PX — Instruction Manual
25
Configuration Summary
Table 6. Protect Switch Summary Table
Autonomous Mode Primary First (w/o Alternate)
PRI fails
PRI restored
too short
PRI restored
PRI Fails
then SEC fails
PRI & SEC Fail
SEC recovers first
PRI
OK
Fail
OK
Fail
OK
OK
OK
Fail
Fail
OK
OK
Fail
Fail
SEC
OK
OK
OK
OK
OK
OK
OK
OK
Fail
OK
OK
Fail
OK
Timer
Timer
Timer OK
Timer OK
Output
PRI
SEC
SEC
SEC
PRI
PRI
SEC
SEC
SEC
PRI
SEC
On
On
On
On
On
On
On
On
On
On
On
On
Autonomous Mode Primary First (with Alternate)
PRI fails
PRI restored
too short
PRI restored
PRI Fails
then SEC fails
PRI & SEC Fail
SEC recovers first
PRI
OK
Fail
OK
Fail
OK
OK
OK
Fail
Fail
OK
OK
Fail
Fail
SEC
OK
OK
OK
OK
OK
OK
OK
OK
Fail
OK
OK
Fail
OK
Timer
Timer
Timer OK
Output
PRI
SEC
SEC
SEC
SEC
PRI
SEC
PRI
SEC
ALT
ALT
Autonomous
Autonomous
Autonomous
Autonomous
On
On
On
On
On
On
On
On
On
On
On
On
Forced Switch to Secondary
Force to SEC
PRI
OK
OK
SEC
OK
OK
Output
PRI
SEC
PRI
SEC
Output
On
Off
Switch to Maintain Primary
PRI is OK
PRI is OK
start with PRI
start with SEC
PRI is Bad
start with PRI
OK
OK
OK
OK
Fail
Fail
OK
OK
OK
OK
OK
OK
PRI
PRI
SEC
PRI
PRI
SEC
Off
On
Off
On
Off
On
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