Maintenance and fault finding
Block Up Converter Systems 6700/6900 series User Guide 101
Faults in the RF waveguide switches
Faults in the RF waveguide switches are caused inside the
switches or in the switch cables. Such faults are likely if:
• the BUC Switch or LNB Switch LEDs on the control
panel of the redundancy controller are illuminated red,
which indicates inconsistencies from the RF waveguide
switch tell-back contacts
• there is a loss of the transmit or receive signal
If these faults are indicated, continue from page 103, Finding
faults in an RF waveguide switch.
Faults in the redundancy controller
Faults in the redundancy controller are caused by faults in the
controller unit itself or the cables connected to the controller.
These types of faults are indicated by the failure of the
redundancy switching equipment when an RF waveguide
switch fault is unlikely. To determine where the fault may be,
continue from page 107, Finding faults in the redundancy
controller.
NOTE
In transmit-only systems, the LNB Switch
LEDs are not operational.
NOTE
In C-Band transmit/receive systems that use
combined RF waveguide/coaxial switches, the
BUC Switch LEDs are not operational.
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