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Conference wahoo::fishing-v2

Title:Fishing-V2: All About Angling
Notice:Time to go fishin'! dayegins
Moderator:WAHOO::LEVESQUE
Created:Fri Jul 19 1991
Last Modified:Wed Jun 04 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:548
Total number of notes:9621

464.0. "sonar conflicts" by SHRCTR::BROSNIHAN () Mon Aug 28 1995 11:18

    I currently have 3 sonar devices on my boat, the first is a lowrance
    high speed depth finder and the other an older eagle fish/depth finder.
    
    The third which I just added a humminbird patinum id 600 seems to be
    picking up the sonar from both the lowrance and the eagle. The depth
    jumps all over the place with either one on. But the hummingbird does
    not effect the other two.
    
    I am going to replace the older eagle by the spring but I want to make
    sure there is no conflict. 
    
    Anyone know whats going on?
    
    
    Dennis
    237-5490
     
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464.1TRACTR::TOMASI hate stiff waterMon Aug 28 1995 14:5510
Dennis,

I've had similar experiences when using two LCRs or flashers made by the 
same manufacturer.  In fact, the problem can occur among almost any brand 
if the transmit frequencys used are the same or extremely close.  The 
problem is that one transducer picks up the signal of another unit's 
transducer and is unable to differentiate the signal from its own, thus 
causing interferance.  My only suggestion is to turn off one of the units.

Joe
464.2Buy different frequency units.SALEM::WOODMMon Aug 28 1995 16:355
    If you plan on running more then one unit at the same time you need
    to purchase ones that run on different frequencies. I've been looking
    into this as I want to add another unit to the back of my boat so I can
    monitor the bottom while working the downriggers. So far I've seen units
    that work at 200KHz, 192 KHz and 50KHz. Most are 200 KHz...
464.3eagleSHRCTR::BROSNIHANTue Aug 29 1995 14:434
    Well, I just bought an EAGLE that is at 192 and the Hummingbird is at
    200, haven't installed it yet. But for some reason I think the older
    EAGLE was at 192 also. I am expecting the same problem, but with any
    luck they will both work. I'll keep you posted...
464.4MRBASS::PUISHYSProject Leader Scheduler V3.0 for Digital UNIXTue Aug 29 1995 15:285
MY two lowrances are at 195, but I don't know what the flash is set too.  
When
the flasher is on I lots of noise on the charts.  But the charts just kill
the high speed flasher..  All kinds of echos on the entore scale.

bob
464.5It works ?SHRCTR::BROSNIHANThu Sep 14 1995 16:5212
    I hooked up the EAGLE SUPER PRO and turned the Hummingbird on with no
    problem. But after a couple of hours the Hummingbird started acting up
    again with depths of 200 feet. Sure enough I shut the new Eagle off and
    the Hummingbird corrected itself, but I could not turn the Eagle back
    on without crazy depths. I tried it again later and it worked fine.
    The only thing I can figure is that I was fishing over a long ledge and
    it was combining both signals or poor filtering in the Hummingbird.
    
    By the way, for $100.00 the EAGLE is a great buy, with great features,
    considering the Hummingbird was over $300.00.
    
    Dennis