Appareo STRATUS ESG Manual - Halaman 5

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Appareo STRATUS ESG Manual
Stratus 2S: Version 1.1
Stratus 1S: Version 1.1
Stratus 2: Version 2.1
Q: Why am I hearing a ticking noise in my audio/intercom
system after installing Stratus ES or Stratus ESG?
A ticking noise may be noticed after installing a new digital transponder on an
aircraft with older audio/intercom systems. The ticking occurs when
transmissions from the transponder are absorbed by existing audio cables and
connectors with inadequate filtering and/or shielding.
The noise has also been reported on aircraft with other brands of transponders
installed. Moving the transponder antenna as far away from other equipment
as possible may reduce the noise level, but the only true solution is to upgrade
the audio panel to newer equipment with higher connector and cable shielding
standards.
Q: Why am I seeing a "transmitter fail" error message on my
transponder?
The transmitter fail message is typically caused by an impedance problem
between the transponder and the external antenna/coax. Try the following
troubleshooting steps:
1. Verify that the transponder is completely seated in the rack, that the RF
connector on the transponder's back plate C-clip is locked in place, and that
the RF connector is not pushed back.
2. Check all BNC connectors for opens or shorts.
3. If you used existing wiring, ensure that it's not hard, brittle, melted, or
otherwise damaged. Consider upgrading to RG142 or RG400 coax.
4. Ensure that the transponder antenna is not broken, cracked, or otherwise
damaged.
5. Verify that the transponder antenna is securely bonded to the airframe.
6. Verify that the transponder antenna is connected to the port labeled
XPNDR ANT and that the GPS antenna is connected to the port labeled GPS.
7. If you are using RG400 coax for the GPS antenna, the minimum length is 10
feet for the correct DB loss.