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Results tagged with avionics
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user 17732
Avionics is applied electronics to aviation. Radars, radios, instruments, dashboards, they all belong to this category.
5
votes
What Electronic Flight Display is this?
At first this reminded me of the Garmin G3X. However, it is mounted on the yoke and must be a GPSMAP 695 or 696
https://buy.garmin.com/en-US/US/p/14860
- 2,718
14
votes
Accepted
What does "Mods" and then the check marked list of numbers mean on avionics?
This indicates the "mod level" of the hardware in the unit. When a piece of equipment is designed and then certified, it is likely that none of the boxes will be marked.
Then say the product design ha …
- 2,718
2
votes
Does ARINC 429 have any error correction methods?
You wouldn't correct the ARINC 429 label, but simply ignore that transmission and wait for the label to be resent again.
If the label isn't received properly within the defined period it would be cons …
- 2,718
1
vote
Should I use given resolution or calculate resolution based on the max range and number of s...
It's important to recognize the the resolution provided in the ARINC 429 spec is an approximation so you can't necessarily use that exactly as it is.
From the commentary in section 2.1.6 Data Standard …
- 2,718
3
votes
What is required to 'upgrade' software from DAL C to DAL A?
The main difference in effort is in the amount of verification required.
Design Assurance Level (DAL) C only requires statement coverage whereas DAL A requires MC/DC coverage.
Some of the DO-178C ob …
- 2,718
5
votes
Accepted
Do the DO-178 standards include guidelines on cyclomatic complexity?
Short answer is No.
From the note after 5.2.2.g
The current state of software engineering does not permit a quantitative
correlation between complexity and the attainment of system safety objec …
- 2,718
8
votes
Accepted
DO-254 and microprocessors: how does it apply?
DO-254 is for Airborne Electronic Hardware. Redundancy isn't necessarily required for DO-254. I would expect that the processor manufacturer would be able to provide a data package with the necessary …
- 2,718
1
vote
What is this instrument and what is it for?
Using the reference provided by Mike Sowsun, it looks like the actual instrument would be a microEncoder from Rocky Mountain Instrument, which appears to have closed operations in 2011.
Product Manual …
- 2,718
2
votes
Accepted
Need help understanding how to decode BCDs and extract specific bits from ARINC 429 data
I'm going to work off of the assumption that the values you have (1059072, 2148546816, 1064192) are the decimal representations of the raw 32 bit words received.
1059072 => 00102900h == 00000000 00 …
- 2,718
2
votes
Accepted
How do ETSOAs/TSOAs expire?
From the Code of Federal Regulations CFR 14
§21.613 Duration.
(a) A TSO authorization or letter of TSO design approval is effective until surrendered, withdrawn, or otherwise terminated by the FAA. …
- 2,718
1
vote
Are there general accuracy requirements for aircraft power supplies?
It would depend on whether you are connecting directly to the main DC bus (28V presumably) or being powered by a DC/DC converter.
DC/DC converters are required to meet TSO C71 Airborne Static ("DC t …
- 2,718
1
vote
How are the system development and integration procedure separated for Integrated Modular Av...
Now Airbus doesn't want to develop this specific system, so they contract it out to another company ACME Avionics. …
- 2,718
2
votes
Accepted
How does this IMU work and how to convert its output into meaningful information?
Regarding the Specified IMU
The referenced document describes the output protocol.
SAEJ1939 CAN 29 bit identifier communication output — the standard for the transportation segment — allows more …
- 2,718
0
votes
Accepted
How does a G1000 equipped with a GDC 74 calculate IAS from dynamic pressure?
I'm not sure if it is the same for all G1000 installations, but according to this Integrated Flight Deck Pilot's Guide the flight data logging feature records both IAS in knots and TAS in knots.
Do y …
- 2,718
7
votes
Does the FAA take programming language selection of the aircrafts' avionics as a factor when...
In my experience, the programming language selected is less important than other factors such as:
the development team's experience with the language.
the complexity of the product being developed
th …
- 2,718