400W Series Installation Manual Page 4-21190-00356-02 Rev. E4.10 DME Tuning (GNS 430W Only)4.10.1 DME Tuning FunctionThe GNS 430W can channel a DME based on the tuned VLOC frequency. The GNS 430W outputs 2 of5, BCD or Slip parallel DME and King Serial DME channeling format. When DME COMMON is heldlow, the GNS 430W actively tunes the DME.4.10.2 DME Tuning Electrical Characteristics4.10.2.1 Parallel DME TuningPin Name Connector Pin I/ONAV PAR DME - 8MHZ P4006 14 OutSER DME – CHAN REQ/PAR DME – 4 MHz P4006 20 Out*SER DME – RNAV MODE/PAR DME – 2 MHz P4006 21 Out*NAV PAR DME – 1 MHz P4006 33 OutNAV PAR DME – 800 kHz P4006 37 OutNAV PAR DME – 400 kHz P4006 39 OutNAV PAR DME – 200 kHz P4006 40 OutNAV PAR DME – 100 kHz P4006 42 OutNAV PAR DME – 50 kHz P4006 43 OutNAV DME COMMON P4006 22 In* These pins are outputs when the GNS 430W is configured for 2 of 5 parallel DME tuning.For each of the parallel DME tuning discrete outputs, the driver output voltage is not more than 1.0 Vwhile sinking 20 mA. The maximum off state leakage current with respect to ground is less than 10 μA.NAV DME COMMON must be pulled low to indicate to the NAV module that it is the devicechanneling the DME.NAV DME COMMON is considered active if either the voltage to ground is < 1.9 V or the resistance toground is< 375 Ω. These inputs are considered inactive if the voltage to ground is 11-33 VDC.4.10.2.2 King Serial DME TuningPin Name Connector Pin I/ONAV SER DME - DATA P4006 19 OutNAV SER DME - CLOCK P4006 18 OutSER DME – CHAN REQ/PAR DME - 4MHZ P4006 20 In*SER DME – RNAV MODE/PAR DME – 2MHZ P4006 21 In*NAV DME COMMON P4006 22 In* These pins are inputs when the GNS 430W is configured for King Serial DME tuningWhen NAV SER DME – DATA or NAV SER DME – CLOCK is asserted high and driving a 360 Ωload, the driver output voltage is not less than 8 V, and when asserted low shall not be greater than 10mV.SER DME – CHAN REQ/PAR DME – 4MHZ, SER DME – RNAV MODE/PAR DME – 2MHz, andNAV DME COMMON are considered active if either the voltage to ground is < 1.9 V or the resistanceto ground is< 375 Ω. These inputs are considered inactive if the voltage to ground is 11-33 VDC.NAV DME COMMON must be pulled low to indicate to the NAV module that it is the devicechanneling the DME.
