K1EL K45 CW Keyboard and Reader Manual K45B
K-45 User’s Manual - Rev B.0
3/8/2023
Page 18
RTTY 1 IDLE
[CQ CQ CQ DE K1EL K1EL
K1EL PSE K][W8RTY W8RTY
DE K1EL K1EL K]
Figure 15 – RTTY Operational Display
Using delimiters ensures that the transmitter is keyed and stable before starting FSK, an additional lead in
delay time is usually required. Also, to prevent character chopping when transmit is turned off a tail delay is
also usually required. PTT is asserted on the leading
[
and held till the trailing
]
. Any text keyed outside the
brackets will be ignored. For typeahead press
INSERT
before entering the delimited string and when ready
to send, press
INSERT
again. After sending has started, the forward slash character
/
will clear the transmit
buffer and RTTY transmission will stop immediately. The right brace
}
will force a CRLF sequence:
CR CR
LF LTRS
. (The
ENTER
key will also generate a
CR LF
).The left brace
{
will initiate an RYRYRY test pattern
that runs for a line of 45 characters and the stops. All ASCII characters which map to Baudot characters are
accepted and printed. The only non-printing Baudot characters acted on are the brackets
[ ]
, slash
\
, left
brace
{
, and right brace
}
. Commands relating to Morse are ignored. Those acted upon are shown below:
1) Tuning command ^T
2) Transmit Pause (INSERT)
3) Clear Tx buffer (DEL)
4) Set PTT Lead/Tail
CRLF handling
A carriage return/line feed ends a current line and starts a new one. This can be handled in one of two ways:
1) A CRLF can be inserted manually using either the
ENTER
or
}
keys.
2) Automatic CRLF, when enabled, will insert CR LF when the line length exceeds 45 characters.
RYRYRY Test
The K45 will send a long RYRYRY string automatically in response to a
{
character. It will automatically
send CRLF at the start of the test string.
RTTY Setup
The RTTY Setup Menu is initiated by
ESC-R
. Two menus are accessed using the Up and Down arrows.
Figure 16 – RTTY Setup Menu 1
RTTY On/Off
When RTTY is on, K45 will only transmit RTTY Baudot as configured in the menus presented here. Morse
function, including sidetone is disabled. Changes made to Morse related configuration will be recorded but
not utilized until RTTY is turned off which will re-enable Morse. CW paddles are ignored when RTTY is on.
FSK Assignment
FSK output can be mapped to either the K45’s Key output or the PTT output. The default, FSK=PTT, sets
the PTT output to be FSK and the KEY output to transmitter key. This is the way most transceivers with a
separate FSK work and allows a user to run CW or RTTY without changing cables. When FSK=Key, the
output is flipped, KEY output is FSK and PTT keys the transmitter. Lead-in and tail delay is applied the same
way no matter which way FSKMAP is set. The most common setup on radios today is to allocate both FSK
and key to an AUX connector. In either case a special cable is required that splits the 1/8” stereo output into
separate Key and FSK leads.