K1EL K45 CW Modem Manual K45
K-45 User’s Manual - Rev A.0
6/6/2021
Page 18
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.
USOS (Transmit UOS) On/Off
To improve transmit integrity at the expense of extra FIGS characters, USOS mode will send two FIGs
characters whenever a figures character follows a space. This reinforces the operation of UOS at the
receiver which forces a letters transition after every space.
Reverse/Normal
This controls the sense of the FSK output. In normal mode (Not Reverse), Mark is signaled when the FSK
output is OFF, and Space is signaled when the FSK output is ON. In reverse mode FSK if on during Mark.
AUTO LF/CR On/Off
When Auto CRLF is on, the K45 counts the printable characters in a line and after 45 characters, an
automatic CR/LF sequence will be inserted after the next space. The character counter is reset after CR/LF.
This is a very valuable feature for conversational RTTY. The operator can type away and not have to worry
about running over at the end of a line.
Figure 13 – RTTY Setup Menu 2
Baud Rate
The K45 supports three operational speeds, 45.45 (60 WPM) 50 (66 WPM) and 75 Baud (100 WPM)
STOP Bit Control
There are two possible settings, 1.5 or 2.0 stop bits. This essentially sets the delay between letters sent in
Baudot mode.
Diddle Control
If Diddle is enabled, a constant stream of LTRS or blanks will fill idle transmission time as soon as a leading
bracket
[
is entered on the keyboard. It will stay active until a trailing bracket
]
is entered. A user always
starts a stream by starting with a leading bracket. They can then type at leisure knowing that diddle will fill
the empty space. Either LTRS or blanks will be sent as specified. There are three choices, Diddle Off, Diddle
with LTRS, and Diddle with Blanks). Most ops send a Baudot blank (0x00) for the diddle, but LTRS (0x1F) is
often used instead.
Miscellaneous Information
CTL-ALT-Enter Clear EEPROM and Restart
This causes a Master Reset of the K45, clearing EEPROM, and reloading factory settings. Be careful when
using this because it will erase all your Messages, Cuts, and Key mappings. Factory settings are:
Speed = 15 WPM
Autospace Off
Paddle Mode = Iambic B
PTT Delays = 0
CWR Gain = 5
CWR Filter = 6
CWR Threshold = 5
CWR TXMON off
Extra Space = 0
1
st
Extension = 0
KeyComp/Weighting normal
Dit/Dah Ratio=50 (1:3)
PaddleSample=50(1 dit)
Keying Output=Key1
Sidetone=800Hz
Paddle Hang = 0
Letterspace = 0
Word Space = 7 dits
Serial Number = 0001
Sleep time = 15 mins
Paddle Watchdog = On
Progress messages are displayed as different sections of EEPROM are initialized for each user, there is
only one keyboard mapping table shared by both users, so map is only displayed for User1:
USR1: MAP KBD MSG
USR2: KBD MSG
