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Powerbox RRS Question
In the absence of a reply from Powerbox Systems, could anyone tell me a bit about how the RRS system selects which RXto use?Does it rely solely on the failsafe signal or does it have logic to detect other problems?
e.g. if oneRX suffers a complete power failure, will the RRSdetect this and switch RXs ornot (as there would be no valid F/Ssignal). |
RE: Powerbox RRS Question
Hello,
I have the RRS and believe it works as follows: It monitors both signals from both receivers. When all is well, it randomly selects one reciever's signals. As soon as reception on one receiver drops from 100% or if it goes to FS then it switches immediately to the other receiver. So to answer your question, yes there is logic in monitoring the signals. Hope this helps (if I understood correctly myself when I purchased it). |
RE: Powerbox RRS Question
When you say the reception 'drops from 100%' what do you mean?
Surely a PCM or 2.4 RX has a valid signal or not? I'm pretty sure that the RRScan't detect the strength of a PCMor 2.4 signal, only its presence or lack of. I'm trying to work out whether it actually does what people think it does (i.e true RXredundancy) or if it is just there in case one RXgoes into failsafe. In my example about the power failure, if the RRSis solely looking for a failsafe signal, will it switch to the good RXor will it contine to use the failed RXwhilst waiting for a failsafe signal? Therefore having a perfectly good RX on board that it won't use. The instructions aren't too clear about the logic used. Zack, if you havetheRRS, could you run a test and unplug the 'in use' RXfailsafe plug and seeif theRRSswitches over? |
RE: Powerbox RRS Question
Hi, I mean it does measure the strength of the signal it receives. It can be valid but weaker. On the display are the signal strength in % for each receiver.If one receiver is 100% and theone it is using drops to 95%, it willswitch to the 100% one. If you have a power failure on a receiver you would get 0% signal so it would switch to the other receiver. Putting it simply, If both are working fine but one has a weaker signal than the other for whatever reason, it switches to the stronger signal. In a failsafe condition, the receiver is still able to send a failsafe signal. With the RRS, you set a spare channel to do this. The receiver goes to FS and the channel you selected for FS switches over and this is the FS signal the RRS detects and will automatically switch to the other receiver. Does this answer your question? </p> |
RE: Powerbox RRS Question
I mean it does measure the strength of the signal it receives. It can be valid but weaker. On the display are the signal strength in % for each receiver.If one receiver is 100% and theone it is using drops to 95%, it willswitch to the 100% one. <font size="1"> The percentage figure after RX 1 and RX 2 always indicates a proportion of the duration of the last flight.</p></font> How the system would react in the situation of an invalid or absent F/S signal is still a mystery. |
RE: Powerbox RRS Question
ORIGINAL: Zack Morris Hi, I mean it does measure the strength of the signal it receives. It can be valid but weaker. On the display are the signal strength in % for each receiver.If one receiver is 100% and theone it is using drops to 95%, it willswitch to the 100% one. If you have a power failure on a receiver you would get 0% signal so it would switch to the other receiver. Putting it simply, If both are working fine but one has a weaker signal than the other for whatever reason, it switches to the stronger signal. In a failsafe condition, the receiver is still able to send a failsafe signal. With the RRS, you set a spare channel to do this. The receiver goes to FS and the channel you selected for FS switches over and this is the FS signal the RRS detects and will automatically switch to the other receiver. Does this answer your question? </p> Sorry to tell you this but you are wrong in your statement. This is the common mis-conception about the RSS system, and is mostly due to the fact that the user manual is not very well written on that respect. The system has no way to know the "strength" of the reception signal ( except if you use a PPM receiver ). So for PCM and 2.4Ghz systems you need to program the transmitter ( "Smartsafe" for JR/Spektrum ) to send a FS signal to a specific channel that the RSS unit will see. This channel has to be plugged to the FS input for each side. Refer to this thread for a more detailed procedure: http://www.rcuniverse.com/forum/m_8038701/tm.htm I have also writen a complete "how to" article for RCJI that will publish along with the new Royal/Spektrum unit review. |
RE: Powerbox RRS Question
Olnico,</p> Thanks for the thread link. You have answered my question and it appears from what you have said that the system will pick up a failed RX as well as one with a failsafe signal.</p> Many thanks,</p> </p> |
RE: Powerbox RRS Question
ORIGINAL: siclick33 Olnico,</p> Thanks for the thread link. You have answered my question and it appears from what you have saidthat the system will pick up a failed RX as well as one with a failsafe signal.</p> Many thanks,</p> </p> Also check the test routine described in the link above. It is very important to test both functionalities on this system. You're most welcome... |
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