Hi All,
I would like to introduce you to a new radio modem that we developed for very long range datalinks!
http://rfdesign.com.au/RFD900.php
Some of the key features of the RFD900 are as follows:
- Multi point and point to point link capability.
- Long range >40km depending on antennas and GCS setup.
- 2 x RP-SMA RF connectors, diversity switched.
- 1 Watt (+30dBm) transmit power.
- Transmit low pass filter.
- > 20dB Low noise amplifier.
- RX SAW filter.
- Passive front end band pass filter.
- Open source firmware / tools, field upgradeable, easy to configure.
- Small (30 x 57 x 13 mm), light weight (14.5g).
- Compatible with 3DR / Hope-RF radio modules.
- License free use in Australia, Canada, USA, NZ.
These modems are designed to support long range applications, while being easy to use and affordable.
These modems have been flying in various platforms and have demonstrated excellent performance in real applications.
RFD900 modems are now available at: http://store.rfdesign.com.au
Support within APM planner and the radio configurator from Michael Oborne is already available.
It works seamlessly with APM planner, all radio Mavlink parameters are available.
Update, December 2014: The RFD900+ with improved specifications is available now at:
http://store.rfdesign.com.au/rfd-900p-modem/
Seppo Saario
rfdesign.com.au
Replies
This makes me wonder what the power output limit of my tablet and OTG cable is. I don't see myself needing the full 30dBm output but I wonder what the amp draw limit would be to much for a mobile device. Figure 4.2 from the data sheet shows 0.2A as the lowest current draw which may be possible. Trees and a big hill here keep my stock 3dr units from reaching.
Hi,
I am using RFD900 from jdrones.com and minimosd v1.1 on my apm2.6. I am requesting a wiring quary. The splitter cable minimosd came with has this cable. There are four cables for telemetry whereas my modem has already 5 wires. How do I connect them?
sku-29888-1-600x600.jpg
sku-29888-3-600x600.jpg
Telemetry-Y-lead-for-3DR-Radio-and-minimOSD-on-APM-31.jpg
I think the only required connections are RX TX 5v and ground. Here's a pin out hope this helps
telemetry pin out.jpg
Is it the same with rfd900...in your attachment it's 3dr telemetry module.
excuse me for asking but if you use 433 for long range telemetry what will you use for radio then ?
I'm asking because i always thought its better to use 433 radio and 900 for telemetry and 1.2-1.3 for video for long range setups.
Sorry i have just saw the date ...
@ Seppo
I have noticed that the antenna's you sell are not listed a vertically polarized or horizontally polarized on the stores web page. I think that would be helpful.. And on the same subject.... is it important that a vertically polarized antenna be vertical or only that it is the same as the one on the ground radio? I accidentally installed that long thin horizontal one vertically on my planes rudder. Couldn't I simply do the same with one on the ground or is there more to it than that? Thanks.
Okay cool thanks that's about what I figured but wasn't sure.
Just a quick update on things that we're up to !
We have just added some more antennas to the online store - 6dBi outdoor, omnidirectional antennas which are good for more permanent, rugged installations. Some more 900MHz antennas are coming soon.
RFD Flex 2 Antennas are coming with cable options for 500mm and 1m for mounting on vertical stabilisers, to give vertical polarisation, to complement the typical Flex1 install.
The RFD900u is coming back into stock soon, we have some units incoming this week (Mid Sept, 2014). In addition, an updated version of the RFD900u V1.2 is being built. The key difference is the ability to surface mount the modem onto another PCB via castellations (vias at the edge of the board). The DF13 connector will remain the same.
RFD900u V1.2 will be FCC modular and IC approved by the end of the year :)
Hardware accelerated encryption has been demonstrated, but needs to be integrated into the main firmware tree - this will be a good step in making sure that the link to the UAV remains secure.
I shall keep you posted on how things are going !
Seppo
Hi All!,
Luke and I were able to go to the UAV outback challenge at Kingaroy on Wednesday, the first day of the search and rescue challenge.
https://www.facebook.com/UAVChallenge
There were 15 teams competing on the day and 14 of them were using the RFD900 for their datalink ! - It was amazing to see the installations and get great feedback from the teams - thankyou!
On Thursday, 25/9/14, two teams completed the outback challenge, for the first time ever !, tomorrow there are 6 more teams running -- good luck all !!
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