Remember: plug in the connectors carefully to the DMX-40 KEY IN/OUT and
AUDIO IN connectors, and do not press downward. This is to prevent accidental
damage of the connector and possible disconnection from the PCB.
Connection Sequence (referring to Figure 8 on previous page):
1. Connect power (12V) to the DMX-40. Use a 12V wall plug or battery. If using a wall
plug, Make sure it is not causing interference on your rig’s receiver.
2. Optionally, connect a 5W dummy load to the antenna connector on the DMX-40 (not
shown in the diagram). This is to prevent you from operating the transmitter without
a load if you forget to switch to External Mode.
3. Connect the provided keyboard to the DMX-40.
4. Turn on the DMX-40, and after it boots, ouch the frequency button so it says
"External."
5. Nothing is connected to the headphone jack on the DMX-40 in this setup, as the
transceiver inside is disabled. However, you also cannot hear the TONE OUT of the
DMX-40. A more complex setup is discussed later if you wish to mix your
transceiver audio and the TONE OUTPUT of the DMX-40.
6. Connect Cable #2 (Stereo Y Connector) to your transceiver headphone out jack,
using an adaptor plug if necessary.
7. Connect a stereo Cable #3 to one side of the Cable #2 Y and the other end of Cable
#3 to the input of your powered speaker.
8. Test to make sure your powered speaker is now generating the output signal from
your receiver.
9. Connect another stereo Cable #3 to the other side of Cable #2 Y, and plug it into the
AUDIO IN jack of the DMX-40.
10. Check to see if there is activity on the TONE LED of the DMX-40 when you turn in
noise or stations on your transceiver (you should also hear them on the powered
speaker).
11. Audio is now complete. If you do not plan to use the DMX-40 to transmit code,
but only plan to use your key, then you are done with setup at this point. Your
key remains plugged directly into your transceiver, as before.
12. Connect Cable #1 to the KEY IN/OUT jack on the DMX-40. Be careful to not stress
the KEY IN/OUT connector.
13. Plug your key into the RED jack of Cable #1.
14. Test your key. Press the key and see if the CW IN LED lights up when the key is
down.
15. Connect another stereo Cable #3 to the BLACK jack on Cable #1 using a 3.5mm to
¼" Adaptor Plug.
16. Connect the other end of the stereo cable to the KEY input jack on your transceiver,
using another 3.5mm to ¼" Adaptor Plug if required.
17. Test to see that by pressing your key, your transmitter is activated.
18. Key wiring is complete.
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