Binghamton, NY Nov ten, 2009 #7 I am not acquainted with meter Procedure, but I might suspect that it has to send out the switching voltages (13v for odd and 18v for even). And, if you have to see another sats it should send out the 22khz tone. I recommend https://dienphucthinh22.wixsite.com/home/post/cap-tin-hieu-rs-485