9/21/2023 0 Comments Preppcomm dmx 40![]() Press SPACE BAR to set the default 20 WPM. On the status line, you will see the question SET CALL WPM =? Asking you to specify how fast to transmit, as there is no history to base that on at this first transmission, and the CALL button will turn RED. In this section we are going to familiarize you with using the four different call and answer functions built into the DMX Press CALL. Also note: When in External Mode, the receiver is also disconnected. This prevents accidental interference on the 40 meter band. Press the Frequency Button until it says External. Using the Transmitter IMPORTANT: Use a DUMMY LOAD or the External Mode while practicing CALL and ANSWER functions. Switching between Normal and External modes is a simple touch on the Frequency Button. External Mode is useful for experimenting with the operation of the DMX-40 without causing interference on the band, or when using the DMX-40 with an external transceiver, allowing the computer section to control that external transceiver by sending Morse Code to it via the KEY OUT jack, and listening to its receiver via the AUDIO IN jack. However, when you see the word "External" instead, the transceiver - again, both receive and transmitter - is inactive. When you see a frequency value in the Frequency Button, the transceiver section is also active - both receive and transmitter. The computer portion is always active when power is on. The Frequency Button The DMX-40 can be thought of as two separate parts: the computer part, and the transceiver part. Before we proceed, it is important to understand how the Frequency Button works (see Figure 3). You have now completed initial setup of your DMX-40 transceiver. Press the FINISH button on the License Level Screen You will be returned to the Main Screen. Select your FCC license level The License Level Entry screen is shown in Figure 6 below. If you don t have an antenna yet, put NO ANTENNA.
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