MMDVM HS Dual Hat Duplex Rev 1.2

Contents:
  1. MMDVM HS Dual Hat Duplex Rev 1.2
  2. Purchased MMDVM Duplex Hat
  3. Installing or Updating Firmware
  4. Running the Duplex Board in Simplex Mode
  5. Selecting TX and RX Frequencies
  6. References

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Related Pages:
  1. Any-Tone-AT-D868/Anytone-AT-D868.html
  2. MMDVM_HS_Dual_Hat_Duplex
  3. Radioddity OpenGD77
  4. MMDVM-Mutli-Mode-Digital-Voice-Modem
  5. Digital-Modes/Pi-Star/Pi-Star.html
  6. Digital Mobile Radio (DMR)

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MMDVM HS Dual Hat Duplex Rev 1.2

This is my V1.0 unit:


MMDVM-HS-Duplex-01.jpg MMDVM-HS-Duplex-02.jpg
MMDVM-HS-Duplex-03.jpg

These units are a variant of MMMDVM HS Dual Hat Duplex Rev 1.2 MMDVM_HS_Hat:

Image Image
Image Image
Notes:
An accidentially deleted 3v3 wire has been added back to the PCB layout.
BOM, Mouser cart and stencil stay the same as for rev1.1.

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Purchased MMDVM Duplex Hat

Image Image
Image
Images From ebay page of the purchased MMDVM HS Dual Hat Duplex
Order Details:
2018 Duplex MMDVM Hotspot Board Module Support DMR P-25 D-Star For Raspberry Pi
Item price AU $61.64
Quantity 1
Item number 113330780767
MMDVM_HS_HAT_DUPLEX
TCXO 14.7456
2 off ADF7021
STM32 F103C9T6

Source:MMDVM2-eBay_ Order details.pdf

Specification:

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eBay Order

Order-Duplex-MMDVM.png

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Installing or Updating Firmware

https://www.df2et.de/mmdvm_hs_builder/

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Running the Duplex Board in Simplex Mode

https://www.rogerclark.net/mmdvm-duplex-hotpot-in-simplex-mode/

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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20181202 - pre published v0.9