3023 (A-034-4-22)

Signal comparison function of the 3023 module

The 3023 module performs amplification and comparison of voltage signals. It receives electrical signals from the indicator circuit and compares them with reference levels set by the design of the unit. This helps the A-034-4-22 form the correct internal control and measurement signals. The board does not display altitude by itself and does not operate as a separate measuring device. Its function becomes meaningful only when installed in the indicator and working with the other electronic sections of the A-034-4-22.

3023 in the A-037 radio altimeter equipment set

The A-034-4-22 indicator is part of the A-037 radio altimeter equipment set. In this system, the radio altimeter generates altitude information, while the indicator receives and presents that information through its internal circuits. The 3023 comparator is one of the boards involved in this internal processing. If the board is faulty, the effect may appear as unstable indication, incorrect signal formation, or malfunction of one of the indicator functions. Proper diagnosis should therefore be done through the A-034-4-22 and A-037 documentation, not by treating the board as an independent unit.

Compatibility of 3023 with A-034-4-22

For this product card, the main installation is the A-034-4-22 indicator unit. The same 3023 board is also associated with related A-034-4 indicator versions, including A-034-4-16 and A-034-4-11, but replacement should always be confirmed by the exact indicator modification. In avionics repair, a board that looks similar is not automatically interchangeable. The indicator version, circuit position, adjustment requirements, connector layout and repair procedure must all match the documentation before the board is installed or supplied as a replacement part.

Technical data status of the 3023 board

According to the available passport information, separate “Basic Technical Data” for the 3023 voltage amplifier comparator are not specified. This is normal for an internal functional module whose electrical modes are defined by the complete indicator unit. Service life and storage life are tied to the A-037 radio altimeter and its associated equipment. The warranty data are also recorded through the product documentation. For supply, the key points are correct designation, applicability to A-034-4-22, condition of the board and availability of passport or repair documentation.

Supply and repair notes for 3023 A-034-4-22

When ordering the part, it is better to describe it clearly as “3023 voltage amplifier comparator board for A-034-4-22 indicator unit.” This reduces the risk of confusing it with another board marked 3023 or a separate comparator module. If the board was removed from an indicator, the source unit and test status should be stated. Before installation, the board should be checked for physical condition, soldering quality, connector or contact condition, traces of overheating, moisture exposure, corrosion and compatibility with the specific A-034-4-22 repair documentation.