CDP-300 Installation Manual
Document Rev. 01.006 DOC0449 Page 25 of 31
Restricted Proprietary and Confidential Information
6.1.3 EMI TEST
The purpose of this test report is to verify that the operation of the CDP-300 does not interfere with basic aircraft
systems and avionics. The CDP-300 has to be installed and function tested with the ISAT-200 and/or the DVI-300.
Refer to the ISAT-200 System Installation Manual (DOC0334) and DVI-300 Installation Manual (DOC0456) for
more information.
Most of the EMI tests can be accomplished on the ground. In some cases flight-testing is required or is easier. If
the aircraft is approved for IFR operations, then it is mandatory that interference between the CDP-300 and the
approach aids be checked in-flight.
The existing on-board GPS should be operational and navigating with at least the minimum compliment of
satellites. The VHF Communication should be set to commonly used frequencies with the squelch open.
VOR/DME receivers should be selected for display. If possible, set up a DME ramp test set on the frequencies
indicated and adjust the output until the flags are out of view. The transponder and encoder should be monitored
with ramp test equipment. Set the output of the transponder test set to 3db above the output necessary to achieve
90% reply. If possible set the ADF to a nearby navigation station.
Operate the CDP-300 unit for at least 10 minutes. During this time use the keypad on the CDP-300 to navigate
the menus and send text messages or make satphone phone calls. These operations will exercise the CDP-300
communications link to the DVI-300 or ISAT-200.
The EMI test for the ISAT-200 (See ISAT-200 Installation Manual DOC0334) exercises the ISAT-200 functionality
(including satellite communication) and should be completed separately for new ISAT-200 installations, or when
audio is added to an ISAT-200 installation.
Observe the GPS for any degradation in satellite status, availability or flags. Listen for any noise or detected audio
signals on the VHF Communication. Listen for any noise or detected audio signals on the VOR/LOC receiver
audio; look for any movement of flags or needles on the VOR/LOC/GS navigation display(s). Observe the
transponder for any loss of reply or spurious reply.
List the power plant, fuel and other electric instruments on the EMI/RFI Test Report and note any anomalies that
occur while transmitting. Assess the results.
If the aircraft is equipped with an autopilot or stability augmentation system, then test fly the aircraft and verify that
operation of the CDP-300 unit does not have adverse effects on these systems. After checking for gross effects at
a safe altitude, fly an approach with each of the different navigation systems coupled to the autopilot (ILS, GPS
ETC.) and look for any anomalies.
Note: The CDP-300 is installed as part of the ISAT-200 system. Please use ISAT-200 System EMI-RFI Test Template DOC0478 R01-
000 for EMI test procedures.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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