Jeremy tests the synthesizer on Company A's RF board. One day later, the board passed a full loop-back test using an external mixer and power combiner to translate the transmitted RF signal back down to the received frequency and back into the antenna port.
Company B's digital board, fully populated, and operational! The switch on the left is the "hook". The ICs are (clockwise from upper left), the voltage regulator, the ADPCM codec, the RX PLD, the Microcontroller, and the TX PLD.
RF, PLD, and Software teams work on final integration of the Company B digital and RF circuit boards.
Company A's RF and digital boards. The RF board has successfully passed a loop-back test. The digital board has been powered up and should be functional soon.
Company B's RF and digital boards fully connected. After tracking down some noise problems generated by the digital board (100 mA p-p square wave currents from shorted PLD pin), the boards passed a full loopback test.
Company B's boards undergo initial installation in the "007" briefcase following successful bench testing!
Congratulations to both companies on an excellent engineering job - designing and testing a full product in a single semester !