The OPT-18A portable avionics tester can be used for testing aircraft instruments, facilitating daily testing and maintenance of aircraft instruments for flight schools, aviation academies, and aircraft maintenance personnel. It can also be used for teaching and testing in laboratories at research institutes.
The OPT-18A is a portable avionics tester that can be powered via a USB cable connected to a power bank or with four AA batteries. It features a built-in screen for easy operation. The transmission power is 0.25 milliwatts, designed to minimize interference with other electronic signals and to better test receiver sensitivity. The input at the receiving port is 20 dBm. During testing, the distance from the transponder antenna should be between 5 to 15 meters depending on the specific test item. If the transponder is directly connected to the OPT-18A via cable for testing, it is recommended to purchase a 40 dB attenuator.

Equipment list: OPT-18A main unit, antenna

OPT-18A Avionics Tester Optional Accessories:

1. 40 dB attenuator. The maximum input for OPT-18A is 20 dBm; exceeding this may damage the OPT-18A. It is recommended for use when directly connecting the OPT-18A to the transponder via cable for testing.

2. OPT-18A stand, for easy fixation of the OPT-18A

Main functions of the OPT-18A Avionics Tester are as follows:

ADS-B signal simulation: Can simulate the transmission of 1090 MHz ADS-B signals, allowing setting of position and altitude to simulate a trajectory of approximately 15 miles from west to east and back to west, used for testing receivers or ATC display systems.

VOR test

ILS test

DME test

ADF-NDB test

Transponder A/C/S mode test

1090 MHz ADS-B test

A/C/S mode transponder output power test

Power droop

Measure Minimum Trigger Level (MTL) for A/C/S modes

-9 dBm sidelobe suppression

Transponder receiving frequency

COMM radio test