by MajorTom » Sat Jul 17, 2010 12:17 am
Hi, I am in the process of trying to design a failsafe system. My use of it will be on the 2.4GHz band, however someone pointed out that the PPM FM systems may be quite hard to detect the loss of a proper servo pulse train. (I started a thread on this in the DIY section). I want this to work for anyone willing to build it, and I do not have any "real" FM equipment to test it with (only a Harbor Freight Wild Hawk radio). In reality I can just get by if someone else could hook one up to a scope (I have a nice Tektronix 2430A DSO, but no Rx's to test) and let me know exactly what happens when the signal disappears. If it is just a random pulse here and there, or if the Rx continues to send a regular but faulty pulse train continually. That of course would make detecting control loss harder, and would necessitate a means to blank the Rx's servo pulse while in failsafe mode. The hardware would make it easier but the info is essential to my success. Thank you and take care!