[Boatanchors] Morse code - ECN and ACN?

[Nick England]

I am attempting to resurrect an early Frederick Electronics Baudot to Morse
converter (hundreds of 2N404 transistors and a thousand germanium diodes)
with no manual or schematic. Yes I should have my head examined.
There is a mode switch labeled NML-ECN-ACN that is wired to the diode
matrix that decodes the 5-bit Baudot pattern to the dit-dah pattern. Does
anyone know what ECN and ACN means?
Can you suggest a better forum for asking this question?
73 and Have Fun,
Nick K4NYW



-- 
Nick England K4NYW
www.navy-radio.com