Comtech EF Data LPOD - Manual (Page 139)

LPOD C-, X-, or Ku-Band Outdoor Amplifier / Block Up Converter (BUC) MN-LPOD
Appendix A Revision 10
A–3
A.3.2 Serial-based Monitor and Control
The EIA-232 Interface is not available for 1:1 Redundancy.
See Chapter 5. SERIAL-BASED REMOTE PRODUCT MANAGEMENT for detailed
information about the remote commands and queries specified in this section.
Serial-based Remote Product Management/Monitor and Control (M&C) of any LPOD Standalone
or 1:1 Redundancy application is available through use of the optional CLC-10 Handheld
Terminal M&C Accessory Kit (CEFD Kit KT-0020518). This kit provides the user with on-site
access to the LPOD’s serial remote control interface. For detailed information about this
optional accessory, see the CLC-10 Comtech LPOD Controller User’s Guide (CEFD P/N
MN-CLC10).
Figure A-2. Serial-based M&C using CEFD Kit KT-0020518
Serial command ESW determines system operation. If ESW=1 (TX Only) or ESW=2 (TX + RX) is
executed in both units, the system will be in Automatic Redundancy mode. In this mode, if a
fault is detected with the active (online) unit – either by loss of communications between the
backup (offline) and active units, or via the summary fault – the backup unit will trigger the
waveguide switch and, assuming the backup unit is not faulted, will become the active unit. The
backup unit will also poll the active unit at regular intervals in an attempt to maintain
configuration compatibility with the active unit; this ensures that, should a fault occur, the
backup unit is configured exactly the same as the active unit.