Redundancy:) Hsb - Comtech EF Data DT-4500 Series Installation And Operation Manual

DT-4500 Series C- and Ku-Band Down Converters
Front Panel Operation
On the bottom line, use the   keys to navigate to the ACTIVATE BACKUP
setting, and then use the  keys to set toggle switchover as NO (i.e., no
backup occurs at the defined operational threshold), or FORCE (i.e., switchover
occurs automatically if operation exceeds the predefined operational threshold).
Note that this submenu is operational only with a backup unit assigned, and with
the switchover set as Automatic. In the absence of a designated backup unit
and/or switchover set as Manual, this message displays:
Press ENTER or CLEAR to return to the previous menus, and then reconfigure the
system to operate as intended.

6.2.3.3.4 (REDUNDANCY:) HSB

In the "Daisy Chain" configuration, the BU communicates with the online units
through the HSB (high-speed bus data interface). The BU detects faults and
reconfigures itself to replace the faulted converter. The BU also uses the HSB to
monitor configuration changes made to an online converter. Changes in
frequency, gain, or polarity are immediately entered into the backup table as
well as information from new online units. The HSB does not interfere with the
remote serial communication link access to any of the converters in the chain.
Use the HSB submenu to configure operation of the 'J3 | HSB' connector that is
provided on the optional Receive Switch Module (RSM) and Transmit Switch
Module (TSM). When an RSM or TSM is not configured for operation, this
message displays:
Press ENTER or CLEAR to continue.
NO UNITS CURRENTLY
BACKED UP OR IN MANUAL
CONV# 01 FRQ= 3625.000
ATTN=00.00 AUTO
CONV #01 – NO DATA
HSB NO RESPONSE
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MN/DT4500.IOM
Revision 2
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