Comtech EF Data KPA080 Installation And Operation Manual page 50

KPA080 Ku-Band Solid-State Power Amplifier
Case 1. Backup < Online unit(s).
1. Ensure the online unit attenuation is set to a value in dB greater than or equal (≥ )
2. With the backup unit forced to be the active unit, adjust the Offset Value in the
3. Toggle between the online and backup units as being the active path by forcing
Online Unit Output Level
Backup Unit Output Level
Backup Unit Offset Value
Online Attenuation Setting
AFTER TOGGLING AND ADJUSTING:
Backup Offset Value
New Equalized Output Level
Backup Attenuation Setting
Case 2. Backup > Online unit(s).
1. With the backup unit forced to be the active unit, adjust the Offset Value in the
2. Toggle between the online and backup units as being the active path by forcing
Online Unit Output Level
Backup Unit Output Level
Backup Unit Offset Value
Online attenuation setting
AFTER TOGGLING AND
ADJUSTING:
Backup Offset Value
New Equalized Output Level
Backup Attenuation Setting
Rev. 0
to the difference in levels measured above.
CONFIGURATION Menu to approximately the difference measured above. This
will be a (-) negative number.
and un-forcing a back-up through the back-up unit CONFIGURATION Menu
settings. Ensure the output levels measured are equal. If necessary, re-adjust the
Offset Value until equal levels are measured. (Note that the back-up unit total
attenuation level as now indicated in the CONFIGURATION Menu will be equal
to the setting of the online unit less the Offset Value.)
For Example:
CONFIGURATION Menu to roughly the difference measured above. This will
be a (+) positive number.
and un-forcing a back-up through the back-up unit CONFIGURATION Menu
settings. Make sure the output levels measured are equal. If necessary, re-adjust
the Offset Value until equal levels are measured. (Note that the back-up unit total
attenuation level as now indicated in the CONFIGURATION Menu will be equal
to the setting of the online unit plus the Offset Value.)
For Example:
= 47.00 dBm
= 48.75 dBm
= 0.00 dBm
= 3.0 dBm
= +1.75 dB
= 47.00 dBm
= 4.75 dB (3+(+1.75)=4.75)
Redundant Configuration
47.0 dBm
45.25 dBm
0.00 dBm
3.00 dB (must be > 1.75 dB)
-1.75 dB
47.0 dBm
1.25 dB (3+(-1.75)=1.25)
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