mww24 Posted December 16, 2008 Share Posted December 16, 2008 My buddy and I were out sat. nite fishing in the same porty. He has a marcum lx3 and I have a VX1. no matter how many times i pushed my IR button I could not get the screen to stop dancin. Whereas his was workin fine once he found the right IR setting. Last year we used the same two flashers and they both worked fine next to each other. Does anyone have any thoughts on why they dont work next to each other now? It was very frustrating. Thanks for the input. Quote Link to comment Share on other sites More sharing options...
DTro Posted December 16, 2008 Share Posted December 16, 2008 The ability to reject interference is based on different varying factors. How close the transducers are togetherWhere the transducers are placed in relation to the water line/iceDepth of waterBottom ContentGain SettingOther flasher in close proximityMore times than not, it just takes fiddling around with them to get the right combination.There are times however when all conditions come together that you just can't make it work. Usually this happens with deeper water and hard bottom Quote Link to comment Share on other sites More sharing options...
NCLaker Posted December 16, 2008 Share Posted December 16, 2008 Does the VX-1 work fine when you have it on and no other flasher is on next to you? It should work with the gain down to 0-2 usually. I had an LX-3tc, Had to turn up the gain quite a bit to see my lure, and as a result I could not knock out the interferance from a nearby FL-8. Ended up having to send in to Marcum to fix. Not sure if the gain/interference problem was caused by the same malfunction or not. They ended up replacing the ducer and doing something to the head unit.May want to give there service a call if you can't figure it out. Quote Link to comment Share on other sites More sharing options...
Deitz Dittrich Posted December 16, 2008 Share Posted December 16, 2008 Like Dtro said, check start playing with how far down the hole you have the ducer.The biggest factor I have seen is water depth combined with bottom content. The harder the bottom and the deeper you are fishing, the more issues you will have. Quote Link to comment Share on other sites More sharing options...
Caleb S Posted December 16, 2008 Share Posted December 16, 2008 Does the VX-1 work fine when you have it on and no other flasher is on next to you? It should work with the gain down to 0-2 usually. I had an LX-3tc, Had to turn up the gain quite a bit to see my lure, and as a result I could not knock out the interferance from a nearby FL-8. Ended up having to send in to Marcum to fix. Not sure if the gain/interference problem was caused by the same malfunction or not. They ended up replacing the ducer and doing something to the head unit.May want to give there service a call if you can't figure it out. How deep were you fishing and how big of a jig were you using? Quote Link to comment Share on other sites More sharing options...
mww24 Posted December 17, 2008 Author Share Posted December 17, 2008 Thanks for the input. Yeah i had the gain up to about 4. I was in 33 ft with a small thin jig. That could very well have been the problem. when we used them together last year we were in 14 fow with spoons. only had the gain a little above zero then. Oh well. I still caught all the fish. he got skunked. Quote Link to comment Share on other sites More sharing options...
broman Posted December 17, 2008 Share Posted December 17, 2008 Check his gain. He might have it cranked way up and that will be overpowering your unit. With his unit down to a low setting you will have a better chance at getting rid of the interference. I had the same issue fishing with my cuz and his FL-18. I sold the VX-1 and got a LX3 for the extra power. The extra power helps me knock out his units interference. Basically, whoever's got the loudest radio gets to hear their music. Quote Link to comment Share on other sites More sharing options...
Dave Posted December 17, 2008 Share Posted December 17, 2008 I don't believe that's true, broman. I believe flashers output the max power and the sensitivity (gain adjustment) is adjusting what the receiver displays. Quote Link to comment Share on other sites More sharing options...
PerchJerker Posted December 17, 2008 Share Posted December 17, 2008 I don't believe that's true, broman. I believe flashers output the max power and the sensitivity (gain adjustment) is adjusting what the receiver displays.Dave is correct. Quote Link to comment Share on other sites More sharing options...
broman Posted December 17, 2008 Share Posted December 17, 2008 I would have to disagree.Here is an explanation of gain from the a wiki entry I found.Quote:In electronics, gain is a measure of the ability of a circuit (often an amplifier) to increase the power or amplitude of a signal. It is usually defined as the mean ratio of the signal output of a system to the signal input of the same system. It may also be defined as the decimal logarithm of the same ratio.Below is what I found in the Vexilar manual which also backs up my explanation. Quote:GAINGain controls the amount of amplification applied to the return sonar signal. Think of gain as your volume control. You turn up the gain to see more of what’s below. You turn down the gain to see less of what you don’t want to see. The goal is to fi nd a gain level that shows you as much real information as possible, without displaying stray signals of clutter and interference.If you really wanted to know for sure you could put a multimeter in between the battery connection and see how the amperage draw changes when you change the gain. Quote Link to comment Share on other sites More sharing options...
broman Posted December 17, 2008 Share Posted December 17, 2008 I just tested the amp draw and it didn't change. So... I'm probably wrong. My electronics knowledge has been lost throughout the years. Why call it gain if it doesn't adjust you power. Can someone chime in? Quote Link to comment Share on other sites More sharing options...
JIM C Posted December 17, 2008 Share Posted December 17, 2008 Your quote:GAINGain controls the amount of amplification applied to the RETURN sonar signal.The key words here are "return sonar signal". All common fishing sonars send their max rated pulse wattage to the transducer, and every time that transducer clicks it's sending a sound wave off into the water. When the sound signal hits something and is returned, the unit will then process that signal and display it according to your sensitivity or "gain" settings. Quote Link to comment Share on other sites More sharing options...
kujo Posted December 17, 2008 Share Posted December 17, 2008 The gain you are refering to in electroincs does not have the same meaning in ultrsonics. When working with ultrasonic technology the lower the better. The higher the gain the more "noise"/false echos are returned. On most transducers, the output/wavelength is always running at the same frequency, while the gain control is reading the returns. By turning up your gain you are looking at that noise that you otherwise want to tune out. Hope that helps. Quote Link to comment Share on other sites More sharing options...
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