We have these four valves onboard our ship, and some time ago one of them broke and was replaced with a new one. But the new valve does not send the open/closed signal to the remote.
I have been assigned to find out why and come with a (hopefully) solution. I have not open the valve box yet, so I have no idea what the problem is, so it could well just be a broken switch or wire, though I know two other guys have looked at it and found nothing. I thought I might as well as you guys some basic questions, regarding RF, because I have very little knowlege about the topic.
I assume it is RF, since it's a very simple system and the remote only has up/down and on/off buttons. And the four indicator LED's.
Here come the questions.
1) In order for the remote to know which one of the valves is open, do the transmitters need to send on different frequencies?
2) If I have a whole bunch of valves, say 100, is it possible that all could send on the same frequency and still know which one is doing what? Guess that would require a controller on the valve side, or maybe just a certain sequence?
3) Is it true, that UHF (I often confuse UHF/VHF) penetrates better than VHF, things like steel and concrete? And that UHF also is more sensitive to noise? We have a UHF in our engine control room, and that radio is basically useless because of noise.
4) What is noise on the radio, actually?
5) If I have two radios, would it be possible for both to talk at the same time, if the "click mute" function was not present?
I have been assigned to find out why and come with a (hopefully) solution. I have not open the valve box yet, so I have no idea what the problem is, so it could well just be a broken switch or wire, though I know two other guys have looked at it and found nothing. I thought I might as well as you guys some basic questions, regarding RF, because I have very little knowlege about the topic.
I assume it is RF, since it's a very simple system and the remote only has up/down and on/off buttons. And the four indicator LED's.
Here come the questions.
1) In order for the remote to know which one of the valves is open, do the transmitters need to send on different frequencies?
2) If I have a whole bunch of valves, say 100, is it possible that all could send on the same frequency and still know which one is doing what? Guess that would require a controller on the valve side, or maybe just a certain sequence?
3) Is it true, that UHF (I often confuse UHF/VHF) penetrates better than VHF, things like steel and concrete? And that UHF also is more sensitive to noise? We have a UHF in our engine control room, and that radio is basically useless because of noise.
4) What is noise on the radio, actually?
5) If I have two radios, would it be possible for both to talk at the same time, if the "click mute" function was not present?
Attachments
-
36.7 KB Views: 7