Advanced Amplifiers AA-618G-300 Solid State Amplifier

RTCA/DO-160 Section 20 provides test procedures to determine if equipment will operate when the EUT and its interconnecting cables are exposed to Radio Frequency interference. Continuous Wave (CW), Square Wave AM (SW), and Pulse Modulated (PM) RF signals are required. A Line Impedance Stabilization Network (LISN) must be inserted in series with each power lead and ungrounded power return lead, with a 10 uF capacitor connected between the power input of the LISN and the ground plane. RTCA/DO-160 Section 20 has been updated to reflect the requirements of the new FAA rule for High Intensity Radiated Fields testing, also known as HIRF Testing, which is a form of EMC testing applicable to equipment that is subject to extreme electromagnetic environments and/or mission-critical equipment whose failure would be hazardous to human safety. HIRF requirements are applied to ensure that the aircraft electrical and electronic systems can continue safe operation without interruption, failure or malfunction.   Conducted Susceptibility Similar to MIL-STD-461F test method CS114, the RF conducted susceptibility test has the RF interference coupled into the EUT interconnecting cables and power leads using an injection probe calibrated (in a 50 ohm fixture) to the required test level before performing the test. During testing, the RF current induced into the cable or lead under test is monitored with a calibrated RF current probe, and the RF power applied to the injection probe is increased until the appropriate current level (as defined by the applicable Equipment Category used) is reached.   Radiated Susceptibility Similar to MIL-STD-461F test method RS103, the EUT and its interconnecting cables and power leads are exposed to RF radiated fields in the frequency range of 100 MHz to 18 GHz. There two RF radiated susceptibility test methods specified in RTCA/DO-160 Section 20. The first method uses a standard semi-anechoic chamber as in MIL-STD-461F test

MIL-STD-461G RS103 is used to verify the ability of the EUT and associated cabling to withstand electric fields. MIL-STD-461G RS103 is applicable for equipment and subsystem enclosures and all interconnecting cables. MIL-STD-461G RS103 is applicable as follows:   Frequency Range Applicability 2 MHz to 30 MHz Army, Navy and optional for all others 30 MHz to 18 GHz All 18 GHz to 40 GHz Optional for all   Test Equipment Signal Generator – Creates signals and modulations for the amplifier. Power Amplifier – Takes signal, amplifies it sometimes greater than 1,000,000 times original power (0dbm going into 1000 W). Low Loss Cables – Interconnect all coax equipment after the amplifier. Dual Directional Coupler – Couples off-nominal values of forward and reverse power (typically by 40 dB or 50 dB). Power Sensors – Measures coupled power from dual directional coupler for monitoring (may need attenuator between the forward coupled port and power sensor to avoid damage). Power Meter – Dual channel, displays power sensor reading in dBm or Watts. Tripod – Holds up the radiating antenna, non-metallic. Radiating Antenna – Transducer which emits RF power into space from the signal source. Electric Field Probe – Measures e-field strength (V/m) on X, Y, Z axes, and composite and returns data via fiber cable. Fiber Optic Communication Link – Non-conductive communication link between field probe and probe interface. Probe Interface – Provides both power and communication to the e-field probe.   Procedures The test procedures shall be as follows: a. Turn on the measurement equipment and EUT and allow sufficient time for stabilization. b. Assess the test area for potential RF hazards and take necessary precautionary steps to assure the safety of test personnel.  c.