Maintenance | 6-5
3. Connect the LNB to the demodulator by attaching the coaxial cables from the Rx
L-band Out on the LNB to the demodulator Rx L-band input port. If the Rx level is
low, check the cable, the feedhorn, and the antenna for proper operation.
Common Problems
The following problems or occurrences have been noted during normal
troubleshooting.
Tx Output is Disabled
When the Tx Output is set to Disabled, the Tx Output level shown on the Sensor Tab
on page B-11 reads -99.00 dBm. This is not an actual reading.
However, when conditions cause the automatic shut-off of the Tx Output signal, the
Tx Output is muted and the Tx Output level on the Sensor Tab on page B-11 reads
-96.00 dBm.
Incorrect Frequency Settings
If the Satellite Network Operations Center (NOC) does not recognize your signal, see
page 4-8 for additional information.
Damaged Cables
RF coaxial cable damaged due to improper handling (such as contact damage due to
improper mating; cable insulation that is damaged, crushed, cut, or charred; cables
were not discharged prior to connecting them; or conductors that are nicked, gouged,
damaged, or severed) may impair system performance and reliability. Do not attempt
to repair broken or damaged coaxial cables unless absolutely necessary. Replace the
entire cable whenever possible.
Damaged cabling and incorrectly tightened connectors can leak RF energy, which may
lead to excessive levels in their immediate vicinity.
Never disconnect RF cables or connectors associated with a transmitter
in operation since this may result in an RF burn through direct contact
with RF conductors.
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