Binghamton, NY Nov 10, 2009 #7 I am not familiar with meter operation, but I'd suspect that it must deliver the switching voltages (13v for odd and 18v for even). And, if you need to see the opposite sats it really should send out the 22khz tone. Robin Layton is https://dienphucthinh22.wixsite.com/home/post/thiet-bi-chong-set-lan-truyen-val-phoenix-contact