cinetj Posted November 2, 2013 Report Share Posted November 2, 2013 Hi, I have noticed a lowering of performance of my two wireless systems during a recent shoot: 2 Lectro UCR 401 and two LMa transmitters, their reach was way lower than usual I did a scan test - everything was clear; They were on the same group, therefore no intermodulation problems; I never had any problems with rf spray from my recorder (a nomad . The shooting was on the sea, it was hot and very umid. The peopel miked were sweting a lot. Could the swet or the umidity and other climat conditions have affected the perfomance fo my two systems? Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 2, 2013 Author Report Share Posted November 2, 2013 I tried to write a nomad 8. I don't why the smiley, but it's true that I am happy with my recorder Quote Link to comment Share on other sites More sharing options...
Constantin Posted November 2, 2013 Report Share Posted November 2, 2013 On the sea? On a ship? A ship with radio comms systems and a radar? Quote Link to comment Share on other sites More sharing options...
JonG Posted November 2, 2013 Report Share Posted November 2, 2013 If I understand you correctly, you are saying that you have two wireless Lectrosonics sets, UCR401 and LMa in the same block? That could be a problem if they are running on frequencies very close together, but likely it is the environment you are shooting in. Hot and Humid conditions where the cast is sweating, and working on a boat, could affect the performance of your gear. Some people here have mentioned getting less performance out of their wireless when working over water Quote Link to comment Share on other sites More sharing options...
Max Hirtenstein Posted November 2, 2013 Report Share Posted November 2, 2013 large amounts of water kill RF range in my experience. seems to soak up the energy instead of bouncing it back. Quote Link to comment Share on other sites More sharing options...
jason porter Posted November 3, 2013 Report Share Posted November 3, 2013 I have spent many shooting days on big ships on the open ocean. I have never experienced short range from water, but definitely from sweat, radio systems, steel etc. Did the camera have a video transmitter? Quote Link to comment Share on other sites More sharing options...
berniebeaudry Posted November 3, 2013 Report Share Posted November 3, 2013 If the tx antennas come into contact with sweaty, bare skin your range can be reduced. Quote Link to comment Share on other sites More sharing options...
Richard Nault Posted November 3, 2013 Report Share Posted November 3, 2013 If the tx antennas come into contact with sweaty, bare skin your range can be reduced. +1. Try a Hush Lav foam pad on the end of the Tx antenna to keep it from coming into contact with sweaty skin... R Quote Link to comment Share on other sites More sharing options...
fieldmixer Posted November 3, 2013 Report Share Posted November 3, 2013 Wow. Thats an interesting idea Richard! Quote Link to comment Share on other sites More sharing options...
Jeff Wexler Posted November 3, 2013 Report Share Posted November 3, 2013 +1. Try a Hush Lav foam pad on the end of the Tx antenna to keep it from coming into contact with sweaty skin... R What is said about sweaty skin affecting the antenna is true... I wonder if a Hush Lav (basically a foam sponge) is the best idea. I haven't tried it but it seems like it would soak up the sweat and expose the antenna to MORE sweat. Maybe not. If it just serves to keep the whole antenna away from the body/skin, that would be a good thing. Quote Link to comment Share on other sites More sharing options...
Zack Posted November 3, 2013 Report Share Posted November 3, 2013 Can use a straw, or sized shrink wrap for more snug fit. Quote Link to comment Share on other sites More sharing options...
al mcguire Posted November 3, 2013 Report Share Posted November 3, 2013 Sweat is conductive. Go to Petsmart and and ask for Airline Tubing. Cut it into small pieces you can put over the antennas. Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 3, 2013 Author Report Share Posted November 3, 2013 On the sea? On a ship? A ship with radio comms systems and a radar? Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 3, 2013 Author Report Share Posted November 3, 2013 No. It was more like a very very rudimentary raft. Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 3, 2013 Author Report Share Posted November 3, 2013 I have spent many shooting days on big ships on the open ocean. I have never experienced short range from water, but definitely from sweat, radio systems, steel etc. Did the camera have a video transmitter? Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 3, 2013 Author Report Share Posted November 3, 2013 Nope. Although i was sending audio to the camera using a senny g3 but i've been doing this for a while using the same frequencies i used the day of the boat. I also ran an intermod check with freq finder Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 3, 2013 Author Report Share Posted November 3, 2013 I think that sweat is the answer. I'll try the hush lav technique today. Thank you all for the great advice, i can't say how much i love this forum. Quote Link to comment Share on other sites More sharing options...
jason porter Posted November 3, 2013 Report Share Posted November 3, 2013 How close were you to the "talent"? If 1 of the 2 transmitters were closer to the receivers, it may have caused the short range in the other unit. Nope. Although i was sending audio to the camera using a senny g3 but i've been doing this for a while using the same frequencies i used the day of the boat. I also ran an intermod check with freq finder Quote Link to comment Share on other sites More sharing options...
Boomboom Posted November 3, 2013 Report Share Posted November 3, 2013 If the tx antennas come into contact with sweaty, bare skin your range can be reduced. +1 Don't underestimate that. Quote Link to comment Share on other sites More sharing options...
Rick Reineke Posted November 3, 2013 Report Share Posted November 3, 2013 I concur with the antenna in contact with the skin.. especially in sweaty conditions. I don't put much faith in the G series 'scan' function, which only detects 'significant' RF. Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 3, 2013 Author Report Share Posted November 3, 2013 How close were you to the "talent"? If 1 of the 2 transmitters were closer to the receivers, it may have caused the short range in the other unit. I didn't know that. Could you explain it? I concur with the antenna in contact with the skin.. especially in sweaty conditions. I don't put much faith in the G series 'scan' function, which only detects 'significant' RF. Quote Link to comment Share on other sites More sharing options...
cinetj Posted November 3, 2013 Author Report Share Posted November 3, 2013 Neither do I, Rick, but the issue was with my lectros. The senny was just a camera hop. Quote Link to comment Share on other sites More sharing options...
jason porter Posted November 3, 2013 Report Share Posted November 3, 2013 The 401 receiver does not reject unwanted RF signals as efficiently as a receiver with a tracking front end, like a 411. Try powering up one LMa and place it next to your receivers. You should see full signal on the receiver that is tuned to that LMa. You should see partial signal on the other receiver. That partial signal will cause significant interference in your other receiver. Fire up the other LMa and do a walk test, see how far you can get before you lose the signal. I didn't know that. Could you explain it? Quote Link to comment Share on other sites More sharing options...
LarryF Posted November 4, 2013 Report Share Posted November 4, 2013 If the tx antennas come into contact with sweaty, bare skin your range can be reduced. +2 LEF Quote Link to comment Share on other sites More sharing options...
studiomprd Posted November 4, 2013 Report Share Posted November 4, 2013 " using a senny " Quote Link to comment Share on other sites More sharing options...
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