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ycsserver:dr1x:dr1x_configuration

Unfortunately, the DR1-X repeater does not offer a LAN interface to be able to be connected directly to a network. Furthermore, its internal repeater control does not support DG-ID (System Fusion II).

However, the DR1-X with its [Control I/O] connector offers the option of using an external repeater control, for example an MMDVM modem. (Attention: DR1-XFR not supportet)
This expansion can be carried out without interfering with the repeater hardware and turns the DR1-X into a full-fledged mmdvm repeater, which now also supports DG-ID (System Fusion II) and can be connected directly to a YCS server.


Required components

very good experiences have been made with the following hardware:


required parts for the connection cable:

  • 15pin D-Sub connector (male) (for connection to DR1-X [CONTROL I/O] connector)
  • 9pin D-Sub connector (male) (for connection to STM_DVM_USB MMDVM-Board)
  • piece of well-shielded cable

Please do not use a VGA screen cable, as not all of the required connections are usually contacted here.

Wiring of the connection cable

Please note the information in the following documents:



Pin assignment of DR1-X [CONTROL I/O] connector:


PIN [CONTROL I/O] Description Comment PIN STM32_DVM Description
1 BASE Bridge to Pin 5 [CONTROL I/O]
2 PTT 5 PTT_R
5 GND 8 GND
7 AF IN 2 TXA_R
8 DISC OUT 6 RXA_R
10 GND
11 EXT port 1 Bridge to Pin 10 [CONTROL I/O]
12 EXT port 2 Bridge to Pin 15 [CONTROL I/O] with 470 Ohm Resistor
15 Switched VCC (13.8 V)



Configuration of DR1-X

  • Set “UP LINK” to Packet Speed 9600bps
  • Set “Deviation” to WIDE
  • Set “Remote Operation” to ON


Further useful information for the configuration of the DR1-X and instructions for level adjustment of the MMDVM board with the help of pistar can be found in the following document:


ycsserver/dr1x/dr1x_configuration.txt · Last modified: 2021/10/05 11:48 by dg9ffm