MMDVM HS Dual Hat Duplex Rev 1.2
Contents:
MMDVM HS Dual Hat Duplex Rev 1.2
Purchased MMDVM Duplex Hat
eBay Order
Installing or Updating Firmware
Running the Duplex Board in Simplex Mode
[Top] [Home]
Related Pages:
Any-Tone-AT-D868/Anytone-AT-D868.html
Radioddity OpenGD77
MMDVM-Mutli-Mode-Digital-Voice-Modem
Digital-Modes/Pi-Star/Pi-Star.html
Digital Mobile Radio (DMR)
[Top] [Home]
MMDVM HS Dual Hat Duplex Rev 1.2
This is my V1.0 unit:
These units are a variant of MMMDVM HS Dual Hat Duplex Rev 1.2 MMDVM_HS_Hat:
This PCB uses the MMDVM_HS.
It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR.
High performance 32-bit ARM processor
Supports DMR, P-25,D-Star and System Fusion
Onboard LEDs to show status (Tx,Rx,PTT,Mode)
Up to 10mW RF power
SMA antenna connector,Antenna included
Mounts cleanly on all current Raspberry Pi's including the Pi Zero
The firmware is pre-loaded and is easily upgraded via software.
Open source 3D printable case available
UHF 430-450 MHz,433mhz and 900MHz
VHF 144 220 Opera FREQ
The upper part is TX,the lower is RX antenna.
UHF+VHF
include two SMA antennas
Modem select:STM32_HS_GPIO
Set TX frequency,RX frequency
TX,RX frequency had better 10M or more apart.
SLOT1,SLOT2 support../../.
size:70*60*20mm
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.
[Top] [Home]
Purchased MMDVM Duplex Hat
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:
Product type: Duplex MMDVM Hotspot
Material: Metal, ABS
Processor: 32-digit ARM professor
RF power: 10mW
Package size: approx. 10 * 6 * 2 cm/ 3.9 * 2.4 * 0.8 in
Package weight: 34g/ 1.2oz
Two Antennas
[Top] [Home]
eBay Order
[Top] [Home]
Installing or Updating Firmware
https://www.df2et.de/mmdvm_hs_builder/
[Top] [Home]
Running the Duplex Board in Simplex Mode
https://www.rogerclark.net/mmdvm-duplex-hotpot-in-simplex-mode/
[Top] [Home]
Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20181202 - pre published v0.9