Telemetry signal delay on U_Opto_4

[robybyte]

See iamges below.

Signal transistion time is way to high. Quick fix: Increase current on anode 1 of u_opto_4. New value: 68 Ohms

Validation of quickfix?

Options:

1. Change opto to a newer version
2. Implement line coding to increase the number of highs and lows send together.