ZLP Electronics DigiMaster Pro3, Manual

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The Front panel
The Rear panel
CW OUT 3.5mm stereo jack socket: Tip = CW keying, Ring=PTT.
Iambic key I/P Your Iambic key fits here.
Audio monitor 3.5mm stereo jack socket:
Tip = Audio TO radio from the interface.
Ring = Audio FROM the radio into the interface. (You can use this as a secondary input to put audio
into the interface, e.g. from extension speaker of radio).
Note: These input and output signals are obtained from the radio side of the interface. You can
monitor them with headphones or powered speakers but you should not normally connect them to
the PC as this would bypass the isolation provided by the interface.
CAT The lead to the radios CAT socket fits here.
When running the test program to check the CAT port the lead MUST be unplugged from this socket
otherwise the program will report the wrong results.