[time-nuts] Re: Texscan Programmable Attenuators

[Tom Holmes via Metronet]

Haven’t seen a Texscan box since the mid70’s!  As I recall, they were in Indy, and JFW is also, so could have been purchased and renamed. 
Anyway, it sounds Ike there are three terminals for each section, with the one showing the dB value being the common. Seems like the hard way to do it, that is, needing both pos and beg supplies. Might have been a customer driven thing. 
If JFW has a similar scheme, then there’s your answer.