2TAKEOFF TOURKey and Knob FunctionsThe 500W-series navigators are designed to makeoperation as simple as possible. The descriptions onthe next three pages provide a general overview of theprimary function(s) for each key and knob. This Take-off Tour section is intended to provide a brief overviewof the primary functions of your 500W-series unit.Experiment with the unit and refer to the referencesections for more information.Left-hand Keys and Knobsk The COM power/volume knobcontrols unit power and communica-tions radio volume. Press momentarilyto disable automatic squelch control.In the GPS 500W, this control is usedonly for power.j The VLOC volume knob (GNS530W) controls audio volume for theselected VOR/ Localizer frequency.Press momentarily to enable/disablethe ident tone.y The large left knob (COM/VLOC)(GNS 530W) is used to tune themegahertz (MHz) value (to the left ofthe decimal point) of the standby fre-quency for the communications trans-ceiver or the VOR/Localizer receiver,whichever is currently selected by thetuning cursor.v The small left knob (PUSH C/V)(GNS 530W) is used to tune thekilohertz (kHz) value (to the rightof the decimal point) of the standbyfrequency for the communicationstransceiver or the VLOC receiver,whichever is currently selected bythe tuning cursor. Press this knobmomentarily to toggle the tuningcursor between the COM and VLOCfrequency fields.W The COM flip-flop key (GNS530W) is used to swap the active andstandby COM frequencies. Press andhold to select emergency channel(121.500 MHz).V The VLOC flip-flop key (GNS530W) is used to swap the activeand standby VLOC frequencies (i.e.,make the selected standby frequencyactive).On the GNS 530W, thelarge and small leftknobs allow you totune the desired COMor VLOC frequency.GPS 500W GNS 530WKey and Knob Functions
