|Make_your_own_Tektronix_TM-500_extender.pdf|| Make your own Tektronix TM-500 extender using the Jamma Board JB-3.
Written by Jan de Rie
This document details how to make your own Tektronix TM-500 extender. Such an
extender allows you to operate a TM-500 plug-in outside of the cabinet, which is
necessary 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 edge
connector with solder eyelets, and wires between them, about 3 feet (Figure 1). The
goal is to provide the same signals present on the edge connector inside the TM-500
frame to the extender connector.
Figure 1: Sample TM-500 extender
The TM-500 interface consists of 56 pins divided into two sections: the Power Supply
section and the I/O assignment section. The Power Supply section consists of the
lower 26 pins of the connector. Because pin B6 is not connected and some of the
pins carry the same signal, only 20 wires are needed to con|