C4FM Multiprotocol Server

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.

very good experiences have been made with the following hardware:

• Raspberry Pi 4B
• Repeater-Builder STM32_DVM_USB (MMDVM-Board)
  • http://www.repeater-builder.com/products/stm32-dvm.html
• pistar-ea by Manuel EA7EE (DG-ID FULLY SUPPORTED)
  • http://pistar.c4fm.es/

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.

Please note the information in the following documents:

• DR-1 REPEATER, BASE and REMOTE Mode Operations
  • dr-1_repeater_base_and_remote_mode_operations.pdf
• STM32_DVM_USB Schematic
  • http://www.repeater-builder.com/products/pdfs/STM32_DVM_v4.pdf

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

• 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:

• RB_DR-1x setup.pdf
  • http://www.repeater-builder.com/products/pdfs/RB_DR-1x%20setup.pdf