In case someone wants to measure multiple RC channels with one CCP1 pin, I did a small expermiment. If you connect every other RC receiver channel to CCP pin using 1N914 diodes (or similar), you will be able to measure pulses from three (or four) RC channels using one pin. Without the diodes, the RC channels that are low, ground out the one that is trying to pulse.
Here is a picture of RC channels 2,4, and 6. Without a channel space between them, they stay high. So, with a PIC that has two CCP pins, you should be able to read all 8 channels!
This picture shows scope yellow probe (rc 2, 4, and 6) with their diodes attached to the scope probe. and scope red probe directly attached to RC channel 2.
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