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2 1
Push ENCI button (9)
Lamp lights inside button; lamp
in PROC or PREAMBLE button
is extinguished.
AROFLEX generates "Start of
Crypto" flag:
- Letters-Figures-Letters-Figures
-Letters
- CR-CR-LF
- enciphered serial number of key
(5-letter group, or ZZZZZ if
indicator key is not present)
- random message key (5-letter
group, repeated five times)
- five other crypto groups.
8. Load message tape into
tape reader, and push
reader on/off button (20)
— see Note (1) below.
AROFLEX prints/punches crypto
text
NOTES
(1) Under no circumstances should the clear text contain NNNN,
as this is detected as the "End of Crypto" flag and no sub
sequent groups will be deciphered. If the message includes*
four consecutive N's, insert a space (or alternatively, several
Figs/Letters shifts) to break the sequence.
(2) Before the 21st line of the cryptogram, counting from the place
where the PREAMBLE or ENCI button was pressed, AROFLEX
automatically inserts the paging information (4 x LF-CR-CR
-PAGE 2, followed by the Station Identification and Station
Serial Number, if put in during the crypto procedure).
(3) The crypto text is about 25 per cent longer than the original
clear text because of the formatting into 5-letter groups
and the 32-to-26 conversion.
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