In his blog you will also find a PDF file with all DMR frequencies in the 70cm band. If you want to know more about the simplex frequencies for DMR, you should read this article by Max (DG1TAL). The probability that the remote station has also configured these channels makes a frequency change possible, if necessary. These channels should also be entered according to the same scheme because they have been copied from code plug to code plug for quite some time and have found a high distribution. Colorcode 1 (Default, no change needed).Because at the latest on the HAM RADIO there are possibilities for spontaneous DMO connections. If it is missing in your CP, please take a few minutes and enter it. Many codeplugs do not contain any such frequencies at all, but this takes away the possibility of a spontaneous DMO contact.Īt least the DMR call frequency simplex frequency should be present in every code plug. But in order for a DMO connection to work at all, the radio must of course be configured correctly on both sides.Ĭodeplugs often contain only a few frequencies for direct mode. With the admittedly privileged locations chosen here, such connections are to be expected – as we know from FM. The graphic for the elevation profile was created with the tool for link distance calculation. I stood on the observation tower in the Rauener Bergen and Max was on the roof of the Technische Universität Berlin. Since both radios were operated with the original stub antenna, an elevated location on both sides was necessary. I used the Hytera PD365 again and Max used the Motorola SL2600. This time a distance of about 53 kilometres was bridged. In May 2018 I had the second DMR Simplex QSO with Max, DG1TAL. As transceiver I used the Hytera PD365 on my side. The distance of this connection was about 33 kilometers. The first QSO of this kind I had in April 2017 with DF1JSF.
And both connections had to be arranged and initiated before over another channel. I can count my direct mode DMR QSOs on one hand. Too bad, because for me these (still) rather rare direct contacts are more attractive than QSOs via a digital relay. Direct contacts on a simplex frequency are rather the exception. Most radio amateurs only use DMR via relays or hotspots.
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