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Search: Posts Made By: jhebert
Forum: Electronics 08-07-2019, 07:54 AM
Replies: 1
Views: 564
Posted By jhebert
NMEA is a private organization. If you want to...

NMEA is a private organization. If you want to influence their standards, the first step is probably for you to formally become a member of the NMEA organization. Full Membership is rather expensive...
Forum: Electronics 04-29-2018, 05:39 AM
Replies: 6
Views: 2,843
Posted By jhebert
The Lowrance POINT-1 contains a GNSS receiver AND...

The Lowrance POINT-1 contains a GNSS receiver AND a magnetic heading sensor. This is the principal distinguishing feature of the POINT-1 compared to other products which are only GNSS receivers.

...
Forum: Electronics 01-19-2018, 09:41 AM
Replies: 10
Views: 1,988
Posted By jhebert
The only useful reading that can be made with a...

The only useful reading that can be made with a "multimeter" to deduce battery state-of-charge is the open terminal voltage.

The resting open terminal voltage of a lead-acid battery is...
Forum: Electronics 01-10-2018, 05:01 PM
Replies: 4
Views: 953
Posted By jhebert
http://continuouswave.com/whaler/reference/VHF_Mar...

http://continuouswave.com/whaler/reference/VHF_MarineBandChannels.html
Forum: Electronics 12-20-2017, 11:48 PM
Replies: 16
Views: 2,236
Posted By jhebert
Bob--you can test YOUR theory that radio waves...

Bob--you can test YOUR theory that radio waves deflect compasses. Just find the antenna and towers for a local broadcast TV station. They are probably transmitting at 500,000-Watts or more--maybe...
Forum: Electronics 12-20-2017, 11:04 AM
Replies: 16
Views: 2,236
Posted By jhebert
Bob--radio frequency transmissions on a boat are...

Bob--radio frequency transmissions on a boat are made at a frequency of about 150-million-cycles-per-second in which the magnetic wave alternates polarity. It is impossible for a compass to be...
Forum: Electronics 09-29-2017, 10:12 AM
Replies: 2
Views: 564
Posted By jhebert
I would not rank LOWRANCE as a premier...

I would not rank LOWRANCE as a premier manufacturer of communication radios. The "buddy" feature is just their branding of what is otherwise known as digital selective calling (DSC) position polling....
Forum: Electronics 09-05-2017, 10:09 PM
Replies: 5
Views: 632
Posted By jhebert
There are at least four ways to derive boat...

There are at least four ways to derive boat speed:

--from a GNSS receiver and its speed-over-ground, which is not measured directly but calculated based on time and distance between two positions;...
Forum: Electronics 09-02-2017, 10:45 AM
Replies: 6
Views: 882
Posted By jhebert
Chirp refers to the sound of a audible signal...

Chirp refers to the sound of a audible signal with upward frequency sweep, like a bird's chirp. If anyone tells you that chirp is an acronym for "Compressed High Intensity Radar Pulse" it is an...
Forum: Electronics 08-23-2017, 03:55 PM
Replies: 8
Views: 773
Posted By jhebert
It is extremely unlikely that having a network...

It is extremely unlikely that having a network backbone T-Connector in the wiring and having no drop cable attached to the DEVICE port will cause an electrical or communication problem for the...
Forum: Electronics 08-23-2017, 03:51 PM
Replies: 8
Views: 773
Posted By jhebert
Good process; repeat the test with a different...

Good process; repeat the test with a different interface cable. In the interim, remove the existing interface cable and check the conductors individually for continuity and for short circuit between...
Forum: Electronics 08-22-2017, 06:16 AM
Replies: 8
Views: 773
Posted By jhebert
To test the cause of the unusual behavior, repeat...

To test the cause of the unusual behavior, repeat the test but with the NMEA-2000 drop cable to the engine disconnected at the network backbone.
Forum: Electronics 08-09-2017, 12:43 PM
Replies: 12
Views: 862
Posted By jhebert
There is a lot of data available from a modern...

There is a lot of data available from a modern outboard engine. On my HDS I have set up THREE pages of engine data in various layouts and organization to display data from my 2010 Evinrude E-TEC...
Forum: Electronics 08-08-2017, 09:07 AM
Replies: 12
Views: 862
Posted By jhebert
Yes, mostly correct, with one exception: the...

Yes, mostly correct, with one exception: the Evinrude ICON Pro series gauges do not read data from a Lowrance FUEL DATA MANAGER data storage module; they track their own values. It will be available...
Forum: Electronics 08-07-2017, 05:28 PM
Replies: 12
Views: 862
Posted By jhebert
Wow--some bad information here. I cannot recall...

Wow--some bad information here. I cannot recall so much bad information in one thread.

First, an E-TEC engine DOES NOT try to power the NMEA-2000 network.

Second, as a result, you DO NOT NEED a...
Forum: Electronics 08-06-2017, 10:21 AM
Replies: 2
Views: 332
Posted By jhebert
If you want to test your 24-Volt SYSTEM, test...

If you want to test your 24-Volt SYSTEM, test with the batteries connected in series, as you use them.

If you want to test the two batteries in your system, test them individually.
Forum: Electronics 07-17-2017, 10:44 AM
Replies: 6
Views: 606
Posted By jhebert
Oh--I guess the OP was asking about electronic...

Oh--I guess the OP was asking about electronic chart cartography for use on his chart plotter. Nothing related to the GPS system. Gotcha. His mention of GPS and chips made me think he wanted advice...
Forum: Electronics 07-14-2017, 10:31 AM
Replies: 6
Views: 606
Posted By jhebert
Re "GPS chips": What Lowrance GPS receiver...

Re "GPS chips":

What Lowrance GPS receiver do you have now? Usually the internal receivers are quite accurate. They're mainly just L1 Coarse Acquisition with SBAS from the Wide Area Augmentation...
Forum: Electronics 06-28-2017, 06:19 PM
Replies: 2
Views: 273
Posted By jhebert
Most boaters install radios for the VHF Marine...

Most boaters install radios for the VHF Marine Band. The only UHF radios a boater might use would be radios for the General Mobile Radio Service (GMRS).



There really are no UHF marine-specific...
Forum: Electronics 06-23-2017, 05:34 AM
Replies: 7
Views: 838
Posted By jhebert
For a small boat, I have found a very effective...

For a small boat, I have found a very effective VHF Marine Band radio antenna to be a metal whip antenna mounted on a four-foot extension mast. I describe all the particulars in detail in an article...
Forum: Electronics 05-23-2017, 07:52 PM
Replies: 6
Views: 651
Posted By jhebert
EPE means Estimated Position Error. It is not...

EPE means Estimated Position Error. It is not particularly meaningful. It is a GNSS receiver's calculation of an ESTIMATE of the ERROR in its position solution. You should not interpret it as the...
Forum: Electronics 05-22-2017, 09:31 PM
Replies: 10
Views: 1,144
Posted By jhebert
I can't imagine there is any way to answer your...

I can't imagine there is any way to answer your question. There is nothing intrinsic in a battery charger that would cause its service life to be limited in any way. I remember my Dad used a battery...
Forum: Electronics 05-12-2017, 01:08 PM
Replies: 8
Views: 721
Posted By jhebert
The voltage is being read at different points in...

The voltage is being read at different points in the circuit.

Also: I hope you get your boat and trailer tipped back up to normal so you can get on the road and there was no damage having them...
Forum: Electronics 05-12-2017, 12:45 PM
Replies: 8
Views: 721
Posted By jhebert
Accuracy of Voltmeter in Multi-function Display

My experience with a LOWRANCE HDS-8 has shown that the reading of the SUPPLY VOLTAGE to the HDS is very closely correlated with a reading of that same power source with a FLUKE DVM that is accurate...
Forum: Electronics 05-05-2017, 01:47 PM
Replies: 5
Views: 681
Posted By jhebert
In general, the answer is YES. In electronic...

In general, the answer is YES. In electronic compasses, the typical determination of heading is by measurement of the magnetic force in two orthogonal directions; one in the forward line of the boat...
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