Comtech EF Data KPA-020IN, Installation And Operation Manual

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Ku-Band Solid-State Power Amplifier Revision 0
Redundant Configuration MN/KPA.IOM
5-5
For Example:
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
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)
Case 2. Backup > Online unit(s).
1. With the backup unit forced to be the active unit, adjust the Offset Value in the
CONFIGURATION Menu to roughly the difference measured above. This will
be a (+) positive number.
2. Toggle between the online and backup units as being the active path by forcing
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:
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 = 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)