Hello, I am implementing VHF navigation systems for an A220 project and have
come across two significant issues with the navigation API provided by the
simulator: NAV Systems 3/4 Inoperational The DME system on the A220
allows for two different DME receivers, each with three channels. Due to this
architecture, I must create a three-channel multiplexer to poll the three
channels consecutively on separate NAV systems from our VOR/ILS so as to not
interfere with their functionality. Luckily, the simulator provides up to four
NAV systems; however, the latter two (3 & 4) don’t actually seem to actually
do anything. Even though I have NAV.1 and NAV.4 tuned to
the exact same frequency, NAV.4 doesn’t return any data.
You should note that DME1 (NAV.3) doesn’t even turn on for whatever
reason, but I’m not even sure if that’s part of the same issue or if it’s
something else. Regardless, all of the tests have been done with the
verifiably powered DME2 ( NAV.4) system for that reason. At one point,
NAV.3 was actually working and was exhibiting the same behavior shown
above.
I have included the systems.cfg entries pertinent to the NAV systems for
reference.
[ELECTRICAL]
...
circuit.5 = Type:CIRCUIT_NAV:1#Connections:bus.4#Power:4, 5, 20.0#Name:NAV1
circuit.6 = Type:CIRCUIT_NAV:2#Connections:bus.4#Power:4, 5, 20.0#Name:NAV2
circuit.7 = Type:CIRCUIT_NAV:3#Connections:bus.4#Power:4, 5, 20.0#Name:DME1
circuit.8 = Type:CIRCUIT_NAV:4#Connections:bus.4#Power:4, 5, 20.0#Name:DME2
...
[RADIOS]
...
Nav.1 = 1, 1, 1
Nav.2 = 1, 1, 1
Nav.3 = 1
Nav.4 = 1
...
Intermittent ADF Data ADF tuning works; however, the data seems to be
intermittent. As you can see in the attached gif, ADF data is momentarily
available but then toggles on/off. And no, the bus powering ADF.1 is
not cutting out. 