Make_your_own_Tektronix_TM-500_extender

Make your own Tektronix TM-500 extender using the Jamma Board JB-3.Written by Jan de RieThis document details how to make your own Tektronix TM-500 extender.Such anextender allows you to operate a TM-500 plug-in outside of the cabinet,which isnecessary when you are doing measurements on a plug-in,e.g.,for repairs.The extender consists of the JB-3 Jamma Board,a 56-pin 0.156"pitch edgeconnector with solder eyelets,and wires between them,about 3 feet (Figure 1).Thegoal is to provide the same signals present on the edge connector inside the TM-500frame to the extender connector.Figure 1:Sample TM-500 extenderThe TM-500 interface consists of 56 pins divided into two sections:the Power Supplysection and the I/O assignment section.The Power Supply section consists of thelower 26 pins of the connector.Because pin B6 is not connected and some of thepins carry the same signal,only 20 wires are needed to connect the Power Supplysection (the minimum number of wires needed is actually 19,but I used two 10-wireflat ribbon cables).-1-