Agilent Oscilloscopes in Aerospace Defense Debugging MIL-STD 1553 serial buses 5990-9167EN c20121108 [2] free download

File name Oscilloscopes in Aerospace Defense Debugging MIL-STD 1553 serial buses 5990-9167EN c20121108 [2].pdf

Oscilloscopes in Aerospace/Defense Debugging MIL-STD 1553 serial buses Agilent's InfiniiVision 3000 and 4000 X-Series oscilloscopes provide MIL-STD 1553 triggering and decoding, as well as eye-diagram mask test capability to accelerate debug of your MIL-STD 1553 buses. The differential 1-Mbps MIL-STD 1553 serial bus is widely used today in a broad range of aerospace/defense systems including aircraft avionics equipment, space-based systems, as well as many ground-based military vehicles. Due to the harsh electrical environment of military equipment, testing the quality of received and transmitted signals is very important. The primary measurement tool that engineers and technicians use today to test the signal The differential probing point for this particular integrity of serial buses is an oscilloscope. But capturing measurement was at the input of Remote Terminal #2. As and measuring the electrical characteristics of MIL-STD expected, words received from the Bus Controller (BC) have 1553 signals have been a difficult and tedious process using reduced amplitudes due to transformer coupling. In addition, conventional analog or digital oscilloscopes. Setting up a the shapes of each receive bit from the BC have been scope to trigger and synchronize on specific transmitted or distorted -- probably due a long and lossy transmission received words often requires an external synchronization line within the aircraft. In this case, the scope revealed a signal or guessing at a specific trigger hold-off setting. And Manchester encoding error (indicated by MANCH text color- then to determine the message information of captured coded in red) that occurred during the 2nd Command Word and displayed communication packets/words requires a transmitted by the BC. With this information provided by commonly used visual "bit-counting" technique, which is the scope, it should now be much easier for the avionics slow and prone to errors. engineer or technician to troubleshoot the root cause of this error. Although MIL-STD 1553 bus monitors/protocol analyzers can provide the high-level protocol layer information regarding transfer of data, they tell you nothing about signal integrity. The answer to this dilemma (scope versus bus monitor) is to use a scope that is also able to intelligently trigger on and decode MIL-STD 1553 signals. Figure 1 shows the display of an Agilent InfiniiVision X-Series scope capturing and decoding a MIL-STD 1553 RT-to-RT message transfer. All Command, Status, and Data Words are decoded and displayed in a time-correlated trace below the captured waveform. In addition, the scope displays a tabular list of decoded data in the upper half of the scope's display.