Philips AROFLEX CRYPTO EQUIPMEN UA8116 Series Operating Instructions Manual page 27

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6. Push ENCI button (9)
Enter clear text from
keyboard or tape reader
- see Notes (1), (2) and (3)
below.
Lamp lights inside button; lamp
in PROC or PREAMBLE button
is extinguished. AROFLEX prints
10 slants {IIIHI III I) to indicate
start of enciphering; this indication
is not stored in memory.
AROFLEX prints clear text and
stores enciphered text in memory.
NOTES
(1) Clear text must not contain NNNN, as this is interpreted
during deciphering as the "End of Crypto" flag and no sub
sequent groups will be deciphered. If the clear-text input
contains NNNN, insert a space (or alternatively, several Figs/
Letters shifts) to break the sequence.
(2) In the INDIRECT mode, AROFLEX automatically imposes
the six-page limit required by ACP-127. At some point
approaching the end of the sixth page (not visible to the
operator), the procedure signal sounds, the OUTPUT lamp
lights and the tape reader stops. Enciphering must now be
terminated (see Step 8). Depending on the amount of clear
text entered in the PROC and PREAMBLE modes, AROFLEX
may automatically terminate enciphering at this point.
(3) Mistakes in the clear-text input can be corrected character-
by-character, using the CORR button. See paragraph 4.7
for procedure.
RESTRICTED