Page 5-16 GNS 400W Series Installation ManualRev. G 190-00356-085.3.11 MAIN CDI/OBS CONFIG PageSelect the MAIN CDI/OBS CONFIG Page(see Figure 5-16). This page allows you to verify theMAIN CDI outputs, both lateral (LAT) and vertical(VERT), and verify and calibrate the MAIN OBS input.Using the controls on the 400W Series unit front panel,make the selections below and verify the interfaces asappropriate:CDI (LAT/VERT)Selection Verify That:Max left The CDI is “pegged” to the left.Full left The CDI is deflected full scale to the left.Center The CDI is centered.Full right The CDI is deflected full scale to the right.Max right The CDI is “pegged” to the right.NAV FLAG (LAT/VERT)Selection Verify That:Hidden The LAT/VERT flag is hidden.In view The LAT/VERT flag is in view.TO-FROMSelection Verify That:FROM The FROM flag is in view.Hidden The TO/FROM flag is hidden.TO The TO flag is in view.SELECTED COURSESelect 150° on the CDI/HSI that is connected to the 400W Series unit‘s MAIN OBS inputs. TheSELECTED COURSE field indicates near to 150° and a Calibrate to 150°? field appears. Selectingthis field calibrates the 400W Series unit to match the input source. Verify OBS operation by checkingthat the course displayed on the 400W Series unit is within 2° of the selected course. Do this at 30°intervals around the OBS card.NOTEIf it is desired to ignore a selected course input (either analog resolver or ARINC 429)for GPS operation in OBS mode, press MENU on the MAIN CDI/OBS CONFIG pageand select ―Ignore SEL CRS for GPS?‖. When OBS mode is selected, the selectedcourse is entered on the controls of the 400W Series unit. If ignoring the selected courseinput such that the VOR valid flag is dependent only on a valid VOR signal, with lateraldeviation calculated by another display device, press MENU on the MAIN CDI/OBSCONFIG page and select ―Ignore SEL CRS for VLOC?‖.Figure 5-16. MAIN CDI/OBS CONFIG Page
