600840-000031 Stratus ES/ESG Installation Instructions
Rev. 2.2
Last Revised: February 20, 2018
Page 33 of 45
5.5. EMI check
NOTE: The EMI testing shall not be performed until after the system functional ground test is
complete and passes.
Communications
(i) Cockpit intercom
Using the cockpit intercom, verify interference-free communications between the crew while
monitoring the effects of Stratus ES/ESG.
(ii) Cabin paging
Verify that cabin paging is functioning clearly while monitoring the effects of Stratus ES/ESG.
VHF communications
Set VHF communications radios to multiple frequencies and monitor the effects of
Stratus ES/ESG while transmitting and receiving. At a minimum, the frequencies listed below
should be tested, in addition to locally available frequencies. Each transmission should occur for
35 seconds for each frequency.
Verify that the NIC value on the GPS receiver diagnostic screen is 7 or greater.
Test each frequency in 1 MHz increments between 118 -136.000 MHz.
Test the following frequencies for VHF radios with 25kHz spacing:
121.150 121.175 121.200 121.225
121.250 131.200 131.225 131.250
131.275 131.300 131.325 131.350
Test the following frequencies for VHF radios with 8.33kHz spacing:
121.185 121.190 130.285 131.290
HF communications
If the aircraft is equipped with HF communications radios, set to multiple frequencies and
monitor effects of Stratus ES/ESG while transmitting and receiving. Record the frequencies
tested:
SATCOM communications (Stratus ESG only)
If aircraft is equipped with a SATCOM system, operate the SATCOM equipment while
monitoring the GPS CN0 diagnostic screen. Verify that the CN0 values on the GPS receiver
diagnostic screen do not drop by 2 dB or more.
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