Jason performs standalone testing of the TX PLD board. The packet structure is visible on the scope!
Jason and Joel working on a loop-back test with the RX PLD connected to the TX PLD. Two days later, a complete test was successfully run with the ADPCM sending data to the TX PLD, the RX PLD bit and frame syncing to the data packets, and the RX PLD sending data back to the ADPCM. Beautiful fidelity.
Eric and Joel show the full loop-back test. The top scope shows the audio out of the ADPCM. The bottom scope shows the packets carrying the digitized audio.
David and Jason complete a successful loopback test and enjoy testing the fidelity from microphone input through the ADPCM and PLDs, and back to the speaker output.
