Radio Tuning Radios are used both for communication, and also for navigation. This tutorial will teach you how to tune the radio of the aircraft to pick up the ATIS - Automatic Terminal Information Service. This is broadcast by all but the smallest airports and provides information on the current ground-level weather, the altimeter setting and the runway in use. Tutorials/startup morning PHTO 1 -9999 19.71731272 -155.0597483 125 0 0 0 0 true true true /sim/model/c172p/brake-parking 1 /controls/switches/master-bat false /sim/model/hide-yoke false /controls/switches/master-avionics false /controls/flight/flaps 0.0 /controls/switches/magnetos 0 /controls/engines/current-engine/throttle 0.0 /engines/active-engine/running false /instrumentation/adf/frequencies/selected-khz 367 /instrumentation/comm[0]/volume 0.8 /instrumentation/comm[0]/frequencies/standby-mhz 118.1 /instrumentation/comm[1]/frequencies/selected-mhz 123.5 /environment/weather-scenario Fair weather /controls/flight/elevator-trim 0.17 /sim/model/c172p/cockpit/control-lock-placed false /sim/model/c172p/cockpit/control-lock-visible false In this lesson, you'll learn how to tune the radio to the ATIS of Hilo Intl, which is the nearest one with ATIS. 0.0 -12 0.0 -0.21 0.19 73.6 10 First you need to power the aircraft by switching the battery on. 9.2 -24.3 0.0 -0.4 -0.1 0.2 48.4 /sim/model/hide-yoke true -0.3124 -0.4083 -0.1917 2.0909 We now power the radio-stack, so you have to switch the battery on. /controls/switches/master-bat /controls/switches/master-bat Then switch the master avionics on to start the radio stack 12.2 -35.2 0.0 -0.2 0.3 0.4 35.0 -0.3500 -0.3233 -0.2261 1.3688 Flip the master avionics switch... /controls/switches/master-avionics 0 /controls/switches/master-avionics 1 The radio is in the middle of the center console. 0.0 -12 0.0 -0.21 0.19 73.6 /sim/model/hide-yoke false 5 There are 4 radios on this aircraft - two for communication (COMM1, COMM2) and two for navigation (NAV1, NAV2). Each radio has an active frequency and a standby frequency. We tune the radio by changing the standby frequency, and then swapping the active and standby. 10 To change the standby frequency, click on the highlighted knob. 339.4 -14.5 0.0 -0.2 0.2 0.4 14.0 0.0000 -0.0537 0.1545 0.4215 The outer knob changes the number on the left of the decimal place. The inner knob changes the number on the right of the decimal place. The left mouse button increases the value, while the middle button decreases it. Alternatively, you can use your mouse wheel. 336.3 -13.9 0.0 -0.2 0.2 0.4 14.0 -0.3347 0.0909 0.0712 1.0661 Set the standby frequency to 126.4 MHz. This is the ATIS frequency for Hilo Intl Airport, and is printed on sectional charts. 336.3 -13.9 0.0 -0.2 0.2 0.4 14.0 -0.3347 0.0909 0.0712 1.0661 /instrumentation/comm/frequencies/standby-mhz 126.40 Now, switch the active and standby frequencies by pressing the swap button so the active frequency is 126.4 MHz. 339.4 -14.5 0.0 -0.2 0.2 0.4 14.0 0.0000 -0.0537 0.1545 0.4215 /instrumentation/comm[0]/frequencies/selected-mhz 126.4 We need to set the COMM1 output to our headset using the audio panel. Use your left mouse button to drag the COMM1 switch upwards if it is not already in that position. 336.5 -10.1 0.0 -0.2 0.2 0.4 14.0 -0.3494 0.0909 0.1406 0.5702 /instrumentation/kma20/com1 0 Listen to the ATIS message. If you cannot hear it, look at the Sound Configuration dialog on the File menu. It will tell you the current weather conditions, the runway in use, and the altimeter setting. Once you've heard it, you can switch it off by swapping the frequency back to standby, or toggling off the audio panel. Switch off the audio panel by setting the switch to the middle position. 336.3 -10.7 0.0 -0.2 0.2 0.4 14.6 -0.3494 0.0909 0.1398 0.5207 /instrumentation/kma20/com1 0 Great job. COMM2 is located immediately below COMM1 in the radio stack, and is tuned in the same way. The NAV radios work in exactly the same way, except they use a different frequency range, and their output goes to the navigational instruments.