Comtech EF Data HPOD, Инструкция по установке и эксплуатации

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HPOD C-, X-, Ku-Band High-Power Outdoor Amplifier
Revision 9
Appendix B B–1 MN/HPOD.IOM
Appendix B. 1:1 AND 1:2
REDUNDANCY OPERATION
B.1 Overview
Comtech’s C-, X-, and KU-Band High-Power Outdoor Power Amplifiers (HPODs) can be used
in redundant configuration by connecting the appropriate redundancy loop cable between the user
M&C location and each HPOD ‘
J4 | REDUNDANT LOOP ’ port. This 1:1 or 1:2 cable has
connector pinouts that allow the HPODs to both automatically detect the type of cable in use and,
when properly connected between the user and the redundancy setup, automatically configure
itself for operations in accordance with the labeling for each cable connector (SSPA 1 or SSPA 2
for a 1:1 system, or SSPA 1, SSPA 2, or SSPA BU for a 1:2 system).
B.1.1 1:1 Redundancy Mode
In 1:1 redundancy mode, the unit that is currently not the active unit (determined by the switch
position) will be the controlling Backup Unit (BU).
The redundancy system’s operating mode is determined by using the “RAM” serial remote
command:

If RAM=1 i set in both units, the system will be in “AUTO” redundancy mode. In this
mode, if a fault is detected with the active unit – either by loss of communications
between the offline and online unit or via the summary fault – the backup (offline) unit
will switch the waveguide switch and become the active(online) unit (assuming the
backup unit is not faulted).

If RAM=0 is set in both units, the system is set to “MANUAL” redundancy mode, and
no switchovers will occur upon fault detection.
Switch position is determined by using the “SSW” serial remote command:

SSW=1 sets the switch to put SSPA 1 online;

SSW=2 sets the switch to put SSPA 2 online.
In 1:1 applications, the BU also stores an offset value, to be used when the BU replaces the active
unit. This offset may be set with the GOF= command. When the online unit is being “backed up”
the BU’s attenuator will be set to this value. This value may be different than the attenuation
value of the online unit to compensate for any gain mismatch between the BU and online units.