marceluda
commented
2 years ago Hello Gacosta.
The easiest way to do that is to use cos_1f signal for modulation. The, X and Y will demodulate using cos_ref and sin_ref , which hace a phase relation with cos_1f.
Are you using the "Lock-in+PID" App ( https://marceluda.github.io/rp_lock-in_pid/ ) or "Harmonic Lock-in+PID" App ?
If you really want to get to the code you have to look at the lock-in module ( https://github.com/marceluda/rp_lock-in_pid/blob/master/lock_in%2Bpid/fpga/rtl/lock.v ) and the function generator module ( https://github.com/marceluda/rp_lock-in_pid/blob/master/lock_in%2Bpid/fpga/rtl/lock/gen_mod2.v ). Or in the most recent App, https://github.com/marceluda/rp_lock-in_pid_h/blob/master/lock_in%2Bpid_harmonic/fpga/rtl/lock.v | https://github.com/marceluda/rp_lock-in_pid_h/blob/master/lock_in%2Bpid_harmonic/fpga/rtl/lock/gen_mod_h.v
I hope this helps.
This App is based in an old version of Scope App ... and the development tools you should have to implement it are described here: https://github.com/RedPitaya/RedPitaya/tree/release-v0.95
El mié, 1 dic 2021 a las 13:15, Gacosta2 @.***>) escribió:
Hello my group is trying to use this as a standalone laser controller with the Lock-in and PID. Could you point me in the direction of the code that creates the reference signals? I would like to have the X and Y values become phase-dependant.
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Gacosta2
Hello my group is trying to use this as a standalone laser controller with the Lock-in and PID. Could you point me in the direction of the code that creates the reference signals? I would like to have the X and Y values become phase-dependant.