Monday, October 14, 2019

About DMR,DSTAR,P25, NXDN YSFReflector Digital Voice Transcoding Server, MMDVM, SVXLINK


How to create an XLX_XRF D-Star Reflector 
https://sadigitalradio.com/digital-radio-how-tos/create-xlx-xrf-d-star-reflector/

How to Creating a YSFReflector
http://ks0lnk.net/?page_id=2968

How to build a Digital Voice Transcoding Server with AMBE  
https://n5amd.com/digital-radio-how-tos/build-digital-voice-transcoding-server/?fbclid=IwAR2KoV7n7jHE8olO1c0Jv6xKRCS4UXOZSF3kH7tks8vfiKUjRRL1NtQuQc4

mmdvm_svxlink-1.pdf
https://www.do0tpb.de/app/download/20307140/mmdvm_svxlink-1.pdf

P25 NXDN Ref Dashboard 
https://github.com/bi7jta/MMDVM-Install_RPT_N4IRS/tree/master/P25/P25Reflector-Dashboard

Other link 
https://github.com/bi7jta/XLX_CN


Sunday, October 13, 2019

Adjust RX/TXOffset (BER) for MMDVM HAT #PI-STAR

Why to set RXOffset/TXOffset?


How to set RXOffset/TXOffset?


Limit: 
Just for MMDVM SIMPLEX HAT, DUPLEX HAT,
not for MMDVM Repeater HAT,  adjust external radio frequency offset and RX/TXLevel instead.


Tuesday, September 24, 2019

NXDN Mode Configuration in MMDVM

Screenshots
Radio setting
 Click to view large image

Click to view large image

Click to view large image

Pi-Star setting
Click to view large image

Click to view large image

NXDN reflector list
http://www.pistar.uk/nxdn_reflectors.php
Click to view large image




Videos
Waiting upload ...
https://youtube.com/channel/UC6Us7z_gkxNKc0PcCuS7fYQ

Tuesday, September 3, 2019

Install Pi-Star OS, MMDVM OS

Install/flash Pi-Star OS, MMDVM OS, Pi-Star IMAGE

Official website provide by Andy Taylor (MW0MWZ)
http://www.pistar.uk/downloads/

for 3B+/4B
http://www.pistar.uk/beta/Pi-Star_RPi_V4.1.0-RC4_27-Aug-2019.zip

for 3B
http://www.pistar.uk/downloads/Pi-Star_RPi_V3.4.17_20-Jan-2019.zip

for NanoPi NEO (512M/256M)
http://www.pistar.uk/downloads/Pi-Star_NanoPi_V3.4.17_09-Jan-2019.zip

Getting Started Video Guide (by W1MSG) [[1]]  This video covers writing the SDCard image to the card, and basic setup/use of Pi-Star.
https://www.youtube.com/watch?v=B5G4gYDdJeQ

Click to zoom in

Saturday, June 1, 2019

Recommend radios for homebrew repeaters(G4KLX)


Recommend radios for homebrew repeaters 
G4KLX
Original from https://wiki.brandmeister.network/index.php/Homebrew/MMDVM

Being tested on Warning
Unknown Question mark
Supported WORK
Unsupported Cross
Known to work well for DStar, all radios should also work fine for DMR (otherwise please edit this list). The following radios have been approved to work as homebrew repeaters HF frontends:

Motorola
Model RX TX Notes
CDM750 / 1250 / 1550LS WORK WORK Excellent TX & RX on all modes
CM140 / 160 / 340 WORK WORK EM200(CM140) Very low BER at Rx (SV4QXF) Tx works (SQ6POG)
EM400 WORK WORK -XE1HAX- TX / RX VHF good work with (SP8NTH) v0.04
GM1200 WORK WORK D-Star,DMR,C4FM,P25 - TX using PIN 24 ACC, RX only via PIN 5 of internal CS(Option)connector [DISC OUT]! PIN 25 ACC NOT WORKING! OK2IT see #GM1200 DISC out
GM300/Maxtrac WORK WORK Very Simple setup
GM338 WORK WORK DMR & C4FM tested
GM340 / GM360 / GM380 WORK WORK
GM350 / GM950 WORK WORK PCB Mod. VHF RX TX work (SQ9MYX), UHF RX TX work with 128ch variant and PCB mod (2E0TSP)
GM600 WORK TX UHF Work (SQ9MYX)
GM600 (reprogrammed to GM950) WORK WORK TX / RX UHF Work excellent on SR8UWD (SP8NTH)
GR1225 WORK WORK N9KRG
M1225 Cross WORK Receive causing unstable BER at Rx 5~10% (VE2RI)
MCS2000 Warning WORK Unstable BER at Rx 1,2~5% (SV4QXF)
MSF5000 WORK WORK X74CXB7106AT Works well for DMR; C4FM and Dstar not tested (YO2LLQ)
MTR2000 WORK WORK Very well for DMR and DStar - C4FM not tested (IZ5IGB)
Pro 3100 WORK Cross At least with 4 used radios I tested, Tx is center frequency is unstable.
Pro 5100 WORK WORK Excellent TX & RX on all modes
R100 Repeater WORK WORK N1XBM
VRM650 (MCS2000) WORK WORK K0XM/W0NQX
VRM850 (MCS2000) WORK WORK N4IRS See VRM.zip in the Yahoo MMDVM files/Hardware area
Kenwood
Model RX TX Notes
TM-V71A/E WORK TX Has a timeout of Max 10 min and its impossible to change this.
TH-F7E WORK Cross (CT1HDC) (IW9GRL - Good reception but unstable BER 0.3~5% )
TKR-750 WORK WORK VK4JLM Tested DSTAR and DMR, interfaced via rear DB25
TKR-830 WORK WORK N4IRS Good receive and transmit Tested DMR only Needs internal jumper Doc to follow
TKR-850 WORK WORK VK4JLM Tested DSTAR and DMR, interfaced via rear DB25
TK-8180 WORK WORK KC9FQT Works great, used for the WF1RES repeater, used with rear DB25 port
TM-D710 Cross Cross Does not work for DMR! PTT works but the handheld does not decode. RX does not work at all. DSTAR not yet tested.(5B4AMD)
TM-D710G WORK WORK W4DHW - Currently being used on D-Star, DMR and P25 as higher power hotspot with STM32_DVM board. Works great! Set A-band or B-band to 9600 baud (external)
YAESU
Model RX TX Notes
DR-1X WORK WORK TX/RX audio is excellent, DMR/D-Star Tested (W2GLD)
FT-7900 WORK WORK Check/fine tune frequency for DMR use. TX will sag with temperature, set it 2-300 Hz above. (LA1PHA/LA1FTA)
FT-7800 WORK WORK Check/fine tune frequency for DMR use. TX will sag with temperature, set it 2-300 Hz above. (LA1PHA/LA1FTA)
FT-8800 WORK WORK
FT-100D WORK (CT1HDC)
FT-8900 WORK WORK (DMR CT1JIB)
FT-817 WORK WORK RX also looks to work (PD0ZRY)
FT-857 WORK WORK DMR/DSTAR works very well as DMO mode, BER stable around 1-2% ( IW9HFS )
FTM100/DE WORK WORK PinOut MMDVM-->MINIDIN 10PIN : 1=DIN6, 2=DIN4, 3=DIN2, 5=DIN1, 6=DIN3 - IZ0RIN
FT-1907R/E WORK WORK Works great on TX, works perfect on RX. You must open the transceiver and use the discriminator audio for tx/rx. 0% stable BER both ways. Although transceiver suffers from overheating if used for TX as well(in case of hotspot), due to lack of a blower. For further info contact me via email.(5B4AMD)
Vertex
VXR-9000 UHF WORK WORK DMR/DSTAR works very well as DMO mode, TXDelay=45, DMRDelay=27, TXInvert=1, RXInvert=0 (F4GIX)
HYT
Model RX TX Notes
TM-600U WORK Cross RX work perfect. TX not work! (SQ9MYX)
Tait
Model RX TX Notes
T800 Series I WORK WORK For TX bypass/cut off low pass filter stage in audio processor, provide new DC bias at half rail into buffer, inject data at buffer. For RX tap at or near discriminator. (VK2AMV)
T800 Series II WORK WORK N4IRS See Tait Series II data modifications.zip in the Yahoo MMDVM files/Hardware area. Additional note by VK2AMV, Be very careful of DC leakage into buffer effecting Op Amp DC bias. I had huge problems with less than a Microamp of DC leakage through a faulty DC blocking capacitor before I discovered it. DMR works great with T800 SII.
T2020 Series II WORK WORK DMR Works, More info (F4GIX)
Tm8100 WORK WORK DMR/DSTAR works well as DMO mode,DMR Delay 83 , More info (F4GIX)
Tm8250 WORK WORK DMR/DSTAR works well as DMO mode,DMR Delay 83 , More info (F4GIX)
TB7100 WORK WORK works with internal connections to RX/TX DF2ET, see https://www.florian-wolters.de/blog/2017/04/02/interfacing-tait-tb7100-and-mmdvm/
ICOM
Model RX TX Notes
IC E880 WORK WORK DMR/DSTAR works well as DMO mode (IK5XMK)
IC-V200TRE WORK WORK DMR/DSTAR works, DMR Delay=40, More info (F4GIX)
IC-E2820 WORK WORK DMR works very well as DMO mode (SY1BRU)
IC-7000 WORK WORK DMR/D-Star works very well as DMO mode (SV6NOB) https://www.youtube.com/watch?v=NevkCvcxZYo
IC-2725 WORK WORK DMR works very well as DMO mode (SY3BOQ)
Harris
Model RX TX Notes
MASTR III WORK WORK DMR works well (NF0T)
Maxon
Model RX TX Notes
SM-6450U WORK Cross RX works great / TX unstable(YO6NAM)
Bridgecom
Model RX TX Notes
BCR-50x WORK WORK All modes work well (KØXM)
TYT
Model RX TX Notes
TH9000D WORK Cross RX DMR work perfect. TX not work!(F4GIX)

Configure Guide for MMDVM Repeater Kit Board 

Hardware store (Amateur radio)

Wednesday, May 15, 2019

Available Shipping Track Query website

17track
https://t.17track.net/en#nums=your-track-number&fc=190094
DHL
http://www.dhl.com/en/express/tracking.html
Fedex
https://www.fedex.com/apps/fedextrack/
USPS
https://tools.usps.com/go/TrackConfirmAction_input
Royal Postal
https://www.royalmail.com/track-your-item
Luxembourg transfer Service
http://www.trackandtrace.lu/homepage.htm
Austria transfer Service
https://www.post.at/en/track_trace.php
Aramex
https://www.aramex.com/track/

Sunday, May 5, 2019

REVIEW: MMDVM NANO HOTSPOT ,Nano hotspot (bluebox) in Europe

Photos show













Recommend a blog for MMDVM in France language, provide by @F8BSY @F6KBR

Radio-Club de PERPIGNAN – F6KBR
http://www.ref66.fr/



User guide for MMDVM_BAT (battery inside)

Basic operations
1, Press POWER button 1s to startup hotspot, wait 30s OLED screen show MMDVM status, when MMDVM service Initialization completed.
2,Press POWER button 5s to shundown hotspot.
3,Press POWER button 3s to reboot hotspot.
4,Double press POWER button to open the LED Flashlight lamp, double press to close

It takes about four hours to charge to 100%.(Ensure input charging 5V1.3A~2A)
It can supply power for about 20 hours.
Automatic shutdown hotspot during charging

Youtube video
Part_1 Basic operations
Part_2 Charging Current Test
Part_3 Disassemble and assemble 
 (16:01 minutes)








 (Duplex HS external SMA ANTs, 0.1 watt, 4 meters distance with wall barrier
 just for reference!)

Update: from now I use Raspberry 3B HAT replace Zero HAT; Purpose: large place to obtain low BER.


Battery install sample if you DIY yourself.
Take care the + - poles ! ! First full turn off the hotspot after pressing for 5 seconds, then soldering , otherwise it will burn your device! 





More videos sharing 


Check out this model $80
https://www.bi7jta.org/cart/index.php?route=product/product&path=59_74&product_id=75

OLED setting for Pi-Star


1, Rotate 180 degree
running effect

Setting step

 You can get one in www.bi7jta.org/cart

2, the type for 0.96 inch and 1.3 inch 



3, show OLED patch by KI9H





About DMR,DSTAR,P25, NXDN YSFReflector Digital Voice Transcoding Server, MMDVM, SVXLINK

How to create an XLX_XRF D-Star Reflector  https://sadigitalradio.com/digital-radio-how-tos/create-xlx-xrf-d-star-reflector/ How to Crea...