Jan 21, 2014, 09:36 AM Registered User I dont get why all people are so impressed by 16Ch PPM. If you calculate the frequency the PPM signal has with 16ch... Normal 8Ch PPM: 22,5ms or 27ms frsky == 44Hz / 37Hz 16Ch: 16*2ms + sync frame >4ms? = 36ms at least. == 27Hz As you can see 16Ch only has a bit less then half the frequency of normal 8Ch or 2/3 the frequency of FrSky PPM. So why would you want 16Ch ppm? The less the frequency the less the servo accuracy. What do you need 16Ch for anyways?
 Jan 21, 2014, 09:57 AM Registered User I don't just stating a updated firmware is out soon lol
 Jan 21, 2014, 10:33 AM Registered User Oh well...Lets see what they will add. Not much information out there yet...
 Jan 21, 2014, 01:21 PM Registered User Actually I have got a project on my mind involving 16 channels. But say for example I settled for 15 channels instead, would that result in 15*2+4 = 34 ms, 29.4 Hz and 29.4/44 = 67 % "accuracy" compared to 1/0,036 ms/44 Hz = 63 % for 16 channels? What is wrong with the software? Rangarid, do you recommend the system and what kind of range have you achieved?
 Jan 21, 2014, 01:54 PM depronman HI , and it work whith all osd ?
 Jan 21, 2014, 02:02 PM Registered User I donīt have it but I donīt see why it wouldnīt work with any/all osd. It has RSSI output so if your osd has input for RSSI you could get the rc signal strange displayed via the osd.
 Jan 21, 2014, 02:22 PM depronman I ask this, because i have write has foxtech to ask if the arkbird uhf worked with the cyclop storm osd and their answer: Hi sir, The ARKBIRD-433UHF can't work with other osd. It is difficult to adjust it to make it work with other osd.
Jan 21, 2014, 02:56 PM
Registered User
UHF is independent from OSD. Maybe thats what they mean is difficult with other OSDs with arkbird UHF:
Quote:
 With Arkbird OSD, it has the following functions: 7. It can be configured to single-wire PPM&RSSI output, three-wire transmission of 10-channel signal and RSSI, with very simple wire connecting; (Arkbird OSD needs to be upgraded to 3.1020 or newer firmware) 8. The original channel 1-4 input ports on Arkbird OSD; automatically become output ports which will output channel 7-10 of the radio TX control; 9. Output channel 9 and 10 can be configured to steering A Servo-Stabilizing-Gimbal for camera. Positive or negative, and the amount of stability augmentation can be adjusted.
I dont have the system yet myself, but with good Antenna position and good 1/2 wavelength antenne (e.g. SRH-771 Diamond) 400mW mode should have at least 40km if you optimize everything. I have seen youtube videos with people that reached 33km with 100mW. It all depends on the antennas and their position.

I dont mean the rlink with 16 channels is bad, as you can adjust the channel length for rlink (2-16channels). I just mean in general that 16channels reduces accuracy. The less channels you have to transmit the smoother servo movement is. thats why in rlink manual they recommend 8 channels.

In general from the specs i'd definitely recommend the system as its only 150\$ including (diversity!!!) rx and lots of features.
 Jan 21, 2014, 03:05 PM Registered User double post... Last edited by Rangarid; Jan 21, 2014 at 04:08 PM.
 Jan 21, 2014, 03:12 PM Registered User Actually, the manual says. "EXT port for extension, support Futaba Sbus and Spektrum/JR Satellite port and plan to support Joystick control, etc." but nothing more, about actual implementation.
 Jan 21, 2014, 03:14 PM Registered User Oh you are totally right, overread that in the manual. I'm sorry. I thought he was talking about the HT port... BTW maybe this thread should be merged with this one: https://www.rcgroups.com/forums/show....php?t=2072354 Last edited by Rangarid; Jan 21, 2014 at 03:24 PM.
 Jan 21, 2014, 03:54 PM Registered User OK, and I think the manual stated that 16 channels gave a 1-2 dbi loss compared to 8 channels. Yea the specs really stand out considering the price. Just waiting for the range reports to drop in.
Jan 21, 2014, 04:07 PM
Registered User
Wohoo both threads have been merged together. Unfortunately now everything is mixed up Oo

Quote:
 Originally Posted by ChrisP92 Yea the specs really stand out considering the price. Just waiting for the range reports to drop in.
10km was first report i saw:
https://www.rcgroups.com/forums/show...9&postcount=30
Last edited by Rangarid; Jan 21, 2014 at 04:14 PM.
 Jan 21, 2014, 09:13 PM Registered User I'm pretty sure It'll go a bit further than that. I did a 74km (46 mile) ground range test at 400mW (turns out it was really 900mW) with stock antennas (Tx on a high point, Rx in my car). I don't want to get into a lot of details until I've had a chance to fly it in my usual high noise environment. No fatal flaws so far though. Power consumption is a bit higher than average. Last edited by Daemon; Nov 11, 2015 at 05:46 PM.
Jan 21, 2014, 10:29 PM
Registered User
Quote:
 Originally Posted by ChrisP92 If I want to run 16 channels on this system and use two 8 channel transmitters (turnigy 9x in ppm mode), will I have to use two receivers then, or can I use the 8 standard slots plus the ppm output to get 16 channels?
from what I read 1 tx and 2 rx's will give you 16ch