User Manual - Unified Microsystems
Contents
1. period of time and then resume keying or stop recording The message length is approximately 180 Morse characters This is over 1 1 2 minutes at 25 WPM more than enough for most applications If you record too long it will start recording over the beginning of your message If this happens re record a shorter message Message Playback To play back a message connect either pin 1 or pin 2 of J4 to ground pin 6 With pin 1 grounded the XT 4B will play back your message as record ed With pin 2 grounded the XT 4B will start with 5 seconds key2. down 1 second key up followed by the recorded message This extra 6 seconds is added to the recorded message time but does not use and message memory Grounding pin 3 is like pin 2 except the key down period is 20 seconds long If pin 1 pin 2 or pin 3 is briefly grounded the XT 4B will go through the selected play back sequence and stop at the end of the message Grounding these pins again will repeat the message This mode is in tended for external control such as with a repeater controller Leaving one of these pins grounded will cause the XT 4B to repeat the recorded message indefinitely Warranty Information Unified Microsystems warrants the components workmanship of the XT 4B CW Beacon 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 Unified Microsystems will at its option repair or replace defective units returned during the warranty period Unified Microsystems reserves the right to change specifications of the XT 4B at any time without notice For support email w9xt unifiedmicro com Please include XT 4 in the subject line Unified Microsystems PO Box 133 Slinger WI 53086 www unifiedmicro com Unified Microsystems XT 4B Beacon Keyer User s Manual Revision 1 01C Unified Microsystems PO Box 133 Slinger WI 53086 www unifiedmicro com Specifications Power 7VDC to 13VDC 5ma typical CW
3. he XT 4B to the 20 WPM will still ensure compliance Start with R7 fully counter clockwise Press the dit paddle and slowly turn the trimpot clockwise The speed will start at 5 WPM As the pot is advanced the speed will suddenly increase to 10 WPM followed by 15 WPM 20 WPM and finally 25 WPM Leave the pot setting at the de sired speed For best results leave the trimpot setting near the middle of the desired speed setting Jumper selection Operation of the XT 4B is controlled by jumpers on J4 The pin definitions are as follows Pin Description Play message Play message preceded by 5 second key down Play message preceded by 20 second key down Not used Record Ground DU BWN RP Pin 1 is the one nearest the corner of the board To select a function con nect the jumper wire between pin 6 ground and the desired function pin Recording To record briefly short pin 5 and 6 with the jumper wire or a small screw driver The LED will turn on The XT 4B is now in record mode Start send ing the message with the paddle The XT 4B will start recording when you first start sending Briefly short pins 5 6 again to stop recording The LED will then go off indicating recording has finished To change the message simply record over the old one The message is non volatile and will re main even if power is removed You can add a period of key up in the middle or at the end of your mes sage Simply stop sending for the desired
4. speed Selectable 5 10 15 20 25 WPM Memory size Approximately 180 Morse letters Output keying Positive 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 4B uses a 1 8 stereo plug The shield wire is ground The tip 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 transmitter Use shielded cable with an RCA phono type connector for the XT 4B end and a connector compatible with your transmitter on the other end 3 Wire power to J3 Be sure to observe correct polarity Note The XT 4B is designed to work with solid state positive keyed radios only Damage can occur to the XT 4B and or your transmitter if it is used improperly If you are unsure of your transmitter type plug the CW cable into the transmitter but leave the other end free Measure the voltage across the other end of the cable Ground the outer shell and the inner pin is pos itive The voltage should measure 5V to 12V If the voltage is nega tive or is more than 24V do not use the XT 4B keyer with your radio Speed Control Speed is controlled by the small trimpot R7 Turning the pot clockwise will increase the speed in 5 WPM increments from 5 25 WPM Note that the 20 WPM speed is actually set for 19 8 WPM FCC regulations require repeater CW ID be less than 20 WPM Setting t
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