Buck Rogers K4ABT Manuel de l'opérateur télécharger pdf (Page 53)

The Packet Radio “2 N 1” Handbook by Buck Rogers K4ABT

Section 1; Packet Radio “The Basics” Section 2; The X1J4 System Node Operator’s (SNO) Handbook

ILLUSTRATION SECTION Charts & Node Drawings TheNET X1J4 System Node Operators Handbook __ Page 53

This modification is for the older, pre 1990, (no suffix), MJF-1270. Most MFJ-1270”B” versions and all “C” versions are

already configured with this feature. To perform this modification, connect one end of a wire to pin 23 of the RS232

connector. Connect the other end of the wire to pins 1-2-3 of JMP9 (these three pins are already connected together on the

circuit board). This modification allows the TheNET X1 firmware to be configured for multi-frequency operation by

jumpering RS232 pins 10 and 23 together in the TNC-to-TNC cable.

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Buck Rogers K4ABT Manuel de l'opérateur Page 53