190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page D-20
NOTES
Figure D-11 GNC - Parallel 2 of 5 DME Tuning Interconnect
Sheet 2 of 2
ALL WIRES 24 AWG OR LARGER UNLESS OTHERWISE SPECIFIED.
GROUND DESIGNATION: AIRFRAME GROUND
REFER TO MANUFACTURER’S DOCUMENTATION FOR COMPLETE PINOUT AND INTERCONNECT
INFORMATION. PINOUTS OF OTHER UNITS SHOWN FOR REFERENCE ONLY. SEE SECTION 6.4.2.4 FOR
GNC CONFIGURATION SETTINGS.
THE GNC SHOULD BE CONFIGURED FOR PARALLEL 2X5 DME CHANNELING MODE FOR PROPER
OPERATION WITH THIS MODEL OF DME TRANSCEIVER.
THE GNC SHOULD BE CONFIGURED FOR NARCO 890/891 DME CHANNELING MODE FOR PROPER
OPERATION WITH THIS MODEL OF DME TRANSCEIVER.
DME 42 SHOULD BE STRAPPED FOR 2X5 TUNING. REFER TO COLLINS DME 42 INSTALLATION MANUAL
FOR STRAPPING INFORMATION.
FOR DUAL GNC INTERFACES TO THE DME, IT MAY BE NECESSARY TO INSTALL A TOGGLE SWITCH FOR
THE “DME COMMON” INPUT. INSTALL SWITCH AS SHOWN FOR KING SERIAL PANEL DME INTERCONNECT.
P1-42 ON THE DME AND P3-46 ON THE COLLINS HSI PROCESSOR UNIT HPU-75 NEED TO BE
DISCONNECTED FROM GROUND IN ORDER TO ENTER DME HOLD MODE, IF DESIRED.
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