Now that we have at least one primary flight instrument, the HSI, under our belt (see the previous 15 postings) I will now move on to something very interesting, which is radio integration into X-Plane. Here is the stack that I will be working with for the next few weeks:
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| Gables Multi Function Radio Head and Gables Audio Selector Panel |
The two instruments in the picture above are a GABLES G6984 radio head and a GABLES G2930 audio selector panel. The G6984 uses the ARINC 429 protocol for radio data and is a perfect next step for the ARINC 429 work I have been doing lately. Unlike the the HSI, which only required sending ARINC 429 data to the device, the G6984 will require bi-directional traffic; radio frequencies from the radio and FMS data to the radio head.
In the L-1011 cockpit there are three identical audio selector and radio head combinations; one for the Pilot, one for the First Officer and One for the Second Officer. For the test setup I will also use a Hand Mike and a David Clark Headset (rather have a Telex, but I don't have access to one). Below is a picture of the input and output:
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| Gables VHF COM, Hand Mike and David Clark Headset |
The L-1011 cockpit has two overhead speakers that can be used for monitoring audio without the need for a headset. For the test setup I will only use one of the two speakers. The speaker is powered and has an amplifier built in.
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| Original L-1011 Cockpit Overhead Speaker |
Tomorrow, we will look at t detail analysis of the audio signals needed for a realistic integration of X-Plane and a simulated ATC system.
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