TTL TTY
Output:
If
you
want to drive
your
external
RTTY
equipment
with a TTL
level instead of the current
loop, open
the unit
by removing
the four
screws on
the bottom and remove the
jumper
plug
from
P3 on
the
keyboard
PCB. This
puts
a
good
TTL level on the rear
jack
marked
"TTL TTY". This
signal
will
also
satisfactorily
drive
some EIA level
receivers. If
you
don’t remove the
jumper,
the
high
level
at the rear
jack
will be invalid
ASCII KEYBOARD:
Same
as above for Baudot
operation except
that
you
can send both
upper
and lower case
after
pressing
SHIFT/CTRL.
The unit comes
up
in the CAP
LUCK node where all
alphabetic
characters are transmitted
as
capital
letters. when not in the CAPS
LOCK
node,
use the
SHIFT
key
for
upper
case the same as on a
typewriter.
DUDE
PRACTICE:
You have
a choice of two
general
modes of random code
practice.
The first
is
true random where the
sequence
is
in
groups
of random
length
which
never
repeat exactly
the same
way.
Call
up
this mode
by placing
an "R" in
message
memory
"A" and
typing
CTRL—4 or
CTRL—5 (see below).
The second mode is PSUEDU RANDOM code
where the
groups
are
always
five
characters in
length
and will
repeat exactly every
time
they
are
played.
There are
eight
different lists called
by placing
a
number
from 1 to B in
message memory
"A"
and
typing
CTRL—4
or CTRL-5 (see below).
The
eight
code lists are available for
checking. They
run about 1500 characters
each.
To halt the code
practice
(for chow call
etc.), press
the SHIFT
key
for one second. To restart where
you
left
off, press
the SHIFT
key
for
one second
again. (Incidentally, halting
code
practice stops
the real~time
clock also.
Practice will
stop
at the end of each list. For the true random
mode,
practice
will
continue
indefinitely
until
you
hit the SYSTEM
ESET.
For
normally spaced practice,
use CTRL-4 to commence the
code,
for code
with extended
spacing
between
letters
(quasi-"Farnsworth Hethod"),
type
CTRL-5 to commence the
practice.
If
you
desire
only
the
alphabetic
characters
(no numbers or
punctuation),
load an "N" in
message
"A" after the "R" or number loaded for true
random
or
psuedo
random
practice.
The
speed
of
code
practice
is set
by
the "SPEED" control and
the
speed
meter indicates the
speed
of character
generation.
Note that
ypu’re
cheating
in the extended
practice
mode so the
wpm
indication
isn’t
correct
though
the
speed
of individual letters is correct.
Use SYSTEM RESET to exit from the
practice
nodes.
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