Unified Microsystems XT-4 CW User manual

Unied Microsystems
PO Box 133
Slinger, WI 53086
www.uniedmicro.com
Beacon Mode
You can put message 1 in auto-repeat or beacon mode by:
1) Turn o the power.
2) Press and hold down the message 2 key.
3) Turn the power back on and then release the message 2 key.
Once the message 1 key is pressed, message 1 will connuously re-
peat unl a paddle key is touched. At that point it will operate as a
normal keyer. Messages 2-4 operate normally. Pressing the message 1
key will return it to Beacon Mode.
Tune
You can place the XT-4 in a key down state for tuning with the follow-
ing procedure:
1) Press and hold the REC buon.
2) Press the 2 buon. The keyer will now be in the tune mode.
3) Touch either paddle key to exit tune mode.
Warranty Informaon
Unied Microsystems warrants the components workmanship of the
XT-4 CW Memory Keyer for a period of 1 year from the date of pur-
chase. A copy of the receipt must be included with any units returned
for warranty repairs.
Unied Microsystems will, at its opon, repair or replace defecve
units returned during the warranty period.
Unied Microsystems reserves the right to change specicaons of
the XT-4 at any me without noce.
UM
XT-4 CW Memory Keyer
Unied Microsystems
PO Box 133
Slinger, WI 53086
www.uniedmicro.com
Unied
Microsystems
User’s Manual
Revision 1.07

Specicaons
Baery: 9 volt alkaline
CW speed: Approximately 5-45 WPM
Memories: 4, approximately 110 Morse characters each
Output keying: Posive Keying only, RCA phono jack output
Paddle input: 1/8’ (3.5mm) stereo jack input
Set UP
1) Wire up your paddle with shielded cable with two conductors. The
XT-4 uses a 1/8” stereo plug. The shield wire is ground. The p of
the connector is for the dit key and the center ring is for the dah
key.
2) Wire up a cable to the CW input of your transmier. Use shielded
cable with an RCA phono type connector for the XT-4 end and a
connector compable with your transmier on the other end.
3) Install a standard 9V alkaline baery in the baery compartment.
Note: The XT-4 is designed to work with solid state posive keyed radi-
os only! Damage can occur to the XT-4 and/or your transmier if it is
used improperly!
If you are unsure of your transmier type, plug the CW cable into the
transmier but leave the other end free. Measure the voltage across the
other end of the cable. Ground is the outer shell, and the inner pin is
posive. The voltage should measure +5V to +12V. If the voltage is neg-
ave, or is more than 24V, do not use the XT-4 keyer with your radio.
ON/OFF/Speed Control
The speed control knob is a combined ON/OFF switch and speed control.
Turn the knob fully counter-clockwise to turn the unit o when not in
use. This will preserve baery life.
Turning the knob clockwise will increase the CW sending speed. The
speed ranges from about 5 WPM to 45 WPM.
The XT-4 has a special power save mode to conserve baery power if
you forget to turn the power o. Aer about 30 minutes of inacvity,
the XT-4 goes into power save. The LED will briey ash every 6 seconds
to remind you to turn it o. Pressing any buon or the paddle will bring
the XT-4 back to normal operaon.
REC and MESSAGE 1-4 Buons
Pressing Message Buons 1-4 will play back the corresponding pre-
recorded message. The message will be played unl it is complete. Press-
ing either the DIT or DAH key paddles will cancel the rest of the recorded
message.
To record a message:
1) Press the REC buon. The LED will blink rapidly.
2) Press the MESSAGE Buon (1, 2, 3, or 4) that you wish to record. The
LED will come on without blinking.
3) Start sending the message you wish to record with the paddle. The XT
-4 will not begin recording unl the rst dit or dah is sent.
4) Press the REC Buon to stop recording. The LED will go out. Press the
REC board as soon as possible aer you nish sending the message.
This will minimize recording dead me at the end of your message.
Message Recording Notes:
1) The message will be preserved even if you turn o the power.
2) If you accidentally press the REC buon and don’t want to record a
message, tap the DIT or DAH paddles before pressing a MESSAGE
BUTTON. This will cancel the record, and the LED will go out.
3) Each message buer will hold approximately 100-110 Morse charac-
ters. You can combine messages 1-2 or 3-4 together. Simply start
recording message 1 or 3, and it will connue into the next message
buer if it is too long to t in the rst buer.
Paddle Reverse
You should wire up your paddle so that the dit and dah keys operate the
way you are used to. You can temporarily reverse the paddle keys for oth-
er operators with the following procedure.
1) Turn o the power.
2) Press and hold down the message 1 key.
3) Turn the power back on.
4) The paddle keys will be reversed as long as power is applied.