HD-10 interference
- Thread starter Derby
- Start date
Hookin'up
Well-Known Member
if your connected to the hds you have to make sure your hooked up properly as only 1 can "talk" and the other only "listen" if they both talk at the same time you have problems
which radio is connected modle#? is the one wired to the hds a SH gx2150 by chance?
which radio is connected modle#? is the one wired to the hds a SH gx2150 by chance?
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Hookin'up
Well-Known Member
Glad you got it figured, now you'll be able to hear us harassing you lol
its no fun when the intended target cant defend themselves
I'll be out this weekend not sure which day we'll run over, I'll pm or text ya when were out,
lets see if we can school them guides again eh? was funny at one time he trolled between you and I and we both had fish on
all in good fun tho and he takes it quite well
its no fun when the intended target cant defend themselves
I'll be out this weekend not sure which day we'll run over, I'll pm or text ya when were out,
lets see if we can school them guides again eh? was funny at one time he trolled between you and I and we both had fish on
all in good fun tho and he takes it quite well
Derby
Crew Member
Hey Tim ..looking like this is the problem.....I'll find out tomorrow... I'm currently using a NEP-1 so I can run my HD-5 at the back of my boat.... Should have it figures out yet... 
08-11-2011, 12:53 PM
I have an HDS-10 with BR-24 radar and Sirius satellite weather connected through a NEP-1 expansion port. Plugging in the expansion port is what causes the interference on channel 68 on both handheld and main radio. I can use either the radar or the satellite antenna with no radio interference. Question: Does the new Navico Expansion Port, NEP-2 solve this? The product from Gander Mountain description says: "A plug-and-play hub with robust 100-megabit switch for high-speed data-sharing of multiple HDS, LCX, LMS, and GlobalMap® products with 5-pin ethernet connectors across an onboard network. New box design emits less VHF radiated energy than its predecessor, NEP-1, thus eliminating VHF interference. Will connect up to 4 compatible head units per expansion module. Waterproof expansion ports resist corrosive marine environments. Unused expansion ports are capped till future expansion. Links with other Expansion Port-1 modules for added expansion. "
grubbab
09-09-2011, 07:11 AM
I called Lowrance tech support about the VHF noise on channel 68. They offered to exchange the NEP-1 for an NEP-2. I installed the NEP-2 and the noise on channel 68 is gone. There is still some minor noise, but I can squelch it, which I could not do before.
When the BR-24 radar is on, either in standby or transmit, and connected to the NEP-2, I get some noise on other channels, 10, 20A and 67. The noise goes away when I turn off power to the radar or unplug it from the NEP-2.
In the NEP-2 installation manual, they give some guidelines for how far apart the various components should be mounted, and I do not comply. I have a 26' center console. The only real place to mount the radar dome, Sirius antenna and VHF antenna are on the T-top. The VHF antenna wire runs down one leg of the T-top and the radar and satellite cables run down the other. All the ground and power leads are solid. Rearranging the wires seems to make no difference. I even pulled a pair of wires directly from the battery to the radio and it made no difference. I then used those wires for the radar and HDS, and still no change, so I think I have ruled out bad connections, ground loops, etc.
In my opinion, Lowrance has adequately fixed the problems with the NEP expansion port. There is still be some excess rf noise coming from the radar dome, but it is of little consequence for me. All in all, I am very happy with the system, and thrilled with Lowrance tech support. When I have called them, they have answered within a few minutes, and been helpful. Only once did I get someone who was unable to understand the issue. I thanked him for his time then called back later and got a better person.
capecuddy
09-09-2011, 11:17 AM
They don't manufacture the NEP-1 any longer. They replaced it with the NEP-2 which supposedly has this fixed (I have one and it seems fine with my HDS-10.)
Anyone with a NEP-1 in warranty should be insisting on a NEP-2 to replace it.
Interesting that it costs about 100 bucks more than a NEP-1. You want to torture one of the cs folks, ask them the difference between a NEP-1 and NEP-2 and why the difference in price.
rwidman
09-09-2011, 02:23 PM
Is it an Icom radio? Just curious.
It doesn't matter what radio. He has tested with a hand held radio. The expansion port is acting like a VHF transmitter and sending out a signal for any radio to pick up.
08-11-2011, 12:53 PM
I have an HDS-10 with BR-24 radar and Sirius satellite weather connected through a NEP-1 expansion port. Plugging in the expansion port is what causes the interference on channel 68 on both handheld and main radio. I can use either the radar or the satellite antenna with no radio interference. Question: Does the new Navico Expansion Port, NEP-2 solve this? The product from Gander Mountain description says: "A plug-and-play hub with robust 100-megabit switch for high-speed data-sharing of multiple HDS, LCX, LMS, and GlobalMap® products with 5-pin ethernet connectors across an onboard network. New box design emits less VHF radiated energy than its predecessor, NEP-1, thus eliminating VHF interference. Will connect up to 4 compatible head units per expansion module. Waterproof expansion ports resist corrosive marine environments. Unused expansion ports are capped till future expansion. Links with other Expansion Port-1 modules for added expansion. "
grubbab
09-09-2011, 07:11 AM
I called Lowrance tech support about the VHF noise on channel 68. They offered to exchange the NEP-1 for an NEP-2. I installed the NEP-2 and the noise on channel 68 is gone. There is still some minor noise, but I can squelch it, which I could not do before.
When the BR-24 radar is on, either in standby or transmit, and connected to the NEP-2, I get some noise on other channels, 10, 20A and 67. The noise goes away when I turn off power to the radar or unplug it from the NEP-2.
In the NEP-2 installation manual, they give some guidelines for how far apart the various components should be mounted, and I do not comply. I have a 26' center console. The only real place to mount the radar dome, Sirius antenna and VHF antenna are on the T-top. The VHF antenna wire runs down one leg of the T-top and the radar and satellite cables run down the other. All the ground and power leads are solid. Rearranging the wires seems to make no difference. I even pulled a pair of wires directly from the battery to the radio and it made no difference. I then used those wires for the radar and HDS, and still no change, so I think I have ruled out bad connections, ground loops, etc.
In my opinion, Lowrance has adequately fixed the problems with the NEP expansion port. There is still be some excess rf noise coming from the radar dome, but it is of little consequence for me. All in all, I am very happy with the system, and thrilled with Lowrance tech support. When I have called them, they have answered within a few minutes, and been helpful. Only once did I get someone who was unable to understand the issue. I thanked him for his time then called back later and got a better person.
capecuddy
09-09-2011, 11:17 AM
They don't manufacture the NEP-1 any longer. They replaced it with the NEP-2 which supposedly has this fixed (I have one and it seems fine with my HDS-10.)
Anyone with a NEP-1 in warranty should be insisting on a NEP-2 to replace it.
Interesting that it costs about 100 bucks more than a NEP-1. You want to torture one of the cs folks, ask them the difference between a NEP-1 and NEP-2 and why the difference in price.
rwidman
09-09-2011, 02:23 PM
Is it an Icom radio? Just curious.
It doesn't matter what radio. He has tested with a hand held radio. The expansion port is acting like a VHF transmitter and sending out a signal for any radio to pick up.
Derby
Crew Member
looks like your gonna have to do some more windows to buy one of those now
I installed a second antenna for the other radio and now I have noise on 88a
so I think I have to look again at component placements on the hardtop, I thought I was ok but I guess not
Haa haa ...never will stop doing windows......Just getting my tub back from the shop again ...broke something on Sunday...She"ll be ready to go on Weds. for some more fishing...
Hookin'up
Well-Known Member
yes of course....problem is I will understand what your saying...haa haa..
Understanding is one thing but comprehending.......... Lol just kidding
See you on the weekend maybe??
