"Hi,
The 900x supports up to 16 channels of PPM passthrough.
Cheers,
Seppo"

"Hi Shameem,
Regarding the poor range on your setup, would you be able to email some pictures of the quad/antenna setup and the ground station antenna setup to info@rfdesign.com.au, or post them here?  - We may be able to offer some assistance with…"

"It has been a long time since updating everyone on what we have been up to!The RFD900x and RFD868x have been quietly released into the marketplace and are proving to be as good as expected.The key differences between the RFD900+ and RFD900x series…"

"Hello Matthew,
We have some more 900u to 8W cables in stock.
They come with the header pins to connect an FTDI cable for upgrade..
http://store.rfdesign.com.au/rfd900u-to-8-way-socket-cable/
This is the recommended way to upgrade firmware on the…"

"Hi Jeremy,
Following on from Paul, if you check the signal quality in mission planner in the tuning page.  RSSI, Remote RSSI, Noise and Remote Noise are the parameters of most interest.
Generally noise is around 40-60 counts, and when both radios…"

"Hi John,
Have replied to your email.. Arranging a replacement for you.

Hi Dennis,
The RFD900 modems will be around and supported for as long as there is demand for them. 
The only feature that has given a hard time has been the AES implementation…"

"Hi John,
I received your message a couple of hours ago.  It does look like you have received a modem that has issues.
Our field failure rate is very low, but, unfortunately failures can occur with almost any product.
Regarding errors in…"

"Just a random update ! - We have FREE DHL Shipping worldwide for this weekend, ending on Monday for all orders over $100 AUD. Just use the coupon code WOW to enable this :) Wishing all a nice weekend from all here. Seppo"

"It has been a long time since updates! We have been working on a lot in the background. A 900 MHz RCLink solution will be available very soon, within the next 1-2 months. Telemetry plus concurrent PPM passthrough. Modems with higher data rates…"

"Hi,
I don't see modems in the 900MHz band becoming obsolete at all.  The frequency band is available in a large number of countries with pretty good license conditions (1W in Aus, and 4W EIRP) in the USA being available.  The propagation in the…"

"One option available that is relatively inexpensive is the RFD900u modems:
http://store.rfdesign.com.au/rfd-900u-radio-modem/
A pair of these is around $98 USD with the current exchange rate!
Good thing is these have filtering, low noise receive LNA…"

"... Thankyou so much James for helping out with questions on the RFD900's - It is really appreciated !"

"Hi Ikaros,
I have not seen that before...  The only thing I can think of is that the modems have lost lock for a moment?..  The local noise level is fluctuating a lot to very high levels..  ~92 or so, peak !...  What kind of area is the testing done…"

"Hi Enes,
Sorry to hear you are having some trouble!... - How did your visit to the repair shop go?, were they able to confirm the setup was OK?

Firstly, if a modem has a red-led by itself, the modem does need to be re-programmed.  This happens on a…"

"Hi Don,
There has been a bit of work back/forth over time with ECC.  The problem has been limited code space available on units with features that have been added.  http://files.rfdesign.com.au/firmware/
Has the current and a few good historical…"

"Hi Ikaros,
It is possible to setup a custom version of firmware to do that -
https://github.com/RFDesign/SiK/commits/max_boom_channel
is a version of firmware that we set to transmit 2 sec pulses at 922MHz for testing for one specific application.…"