[eagle] Re: CAN-Do-Too! ??????????
eagle at howardlong.com
Tue Jul 10 13:52:52 PDT 2007
> The naming of one "EB" is a legacy from P3D where the engineering beacon
> was so pervasive throughout the satellite that it was decided to actually
> name one of the user pins as such. Part of this is also driven by P3E/P5A
> perceived requirements. P3E has used some of the user pins to input
> structure thermistor signals to modules that do not otherwise use all
> of their analog input pins on the 40 pin connector.
On P3E, the EB signal goes to the P3E U/V transponder from the IHU3. In the
U/V transponder, it hits a DSP GPIO pin via a voltage level adjustment and
isolation circuit. The DSP uses this to generate the BPSK beacon.
73, Howard G6LVB
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