Japan Radio Co., LTD Support

[JRC Support]

Hey Guys,

I am an employee of Japan Radio Co., Ltd. and have registered here to provide you guys with any JRC support you need. We will have our own forum up in a few weeks for specific product info and questions, but for now, let me know if you need anything.

I have been with JRC for 6 years and can answer any questions you can come up with....within reason of course.

[roscoe]

I am useing a JRC radar and wish to thank you guys for your help in getting the bugs worked out. it has worked flawlessly for the past year. good product.
Roscoe

[Talbot]

I do not have JRC equipment for obvious reasons (see boat type), but welcome you to these forums and say thank you for this initiative, which is definitely in both our interests (company and sailing community).

[Hampus]

Nice!

I worked 2 years as a field technitian on JRC equipment and although there was (is) a rather slim product range for leasure craft, I always felt that the support and knowledge was slim to nothing. This is a really good initiative and should be followed by more manufacturers. Welcome!

/Hampus

[David M]

I think good support is worth paying a little more for a product. My hats off to you.

[JRC Support]

Thanks guys!

I know our product line has dwindled down over the years, but we still actively support all the products that we sold.

If anyone ever has any problems or questions, please let me know.

[Islander]

I've a quick question about my 1500 MKII radar.

I have it connected to a Brookhouse multiplexer so it gets NMEA info from the GPS, instruments and PC.

The display of waypoint info (bearing, distance and time to wpt) comes and goes every 10-20 seconds. It seems like it might need to be fed the NMEA sentences more frequently than it currently gets them to continuously display them - same is true of the on-screen "lollipop" waypoint.

It does continuously display the course heading, speed and lat/long so it doesn't seem to be a wiring issue.

It's more of a nuisance than a problem, but I thought I'd avail of your generous offer!

The 1500 works great, I don't know why anyone would spend 50% more to get an equivalent Raymarine or Furuno.

Thanks in advance.

Cheers.

[JRC Support]

Islander,

Do you have any way of telling me what NMEA sentences are coming from your GPS?

The R1500 will accept RMA, RMB, RMC, GLL,GTD, VTG, BWC sentences.

The BWC is the sentence that contains bearing and distance to waypoint.

It is possible that you GPS may be programmable to output different sentences at each transmission interval. Maybe it is outputting all those sentences, but it only outputs BWC every other burst.

Another thought is that if the GPS is outputting all those sentences every burst, but the baud rate is too high, it may chop some data off every once in a while.

Let me know what sentences your GPS is outputting and what the baud rate is.

[s/v Jedi]

Islander: that behavior is often caused by two different active waypoints being transmitted through the system, of which one is very far away or just lat/long 0/0. The display will cycle the two in that case.

Same happens with two GPS's that have slightly different readings... you see the position cycling.

I solved this with a programmable multiplexer (shipmodul.com) where you can set port priorities.

The best way to find this is by monitoring the stream coming from the mux on a PC.

cheers,
Nick.

[Islander]

JRC Support: PC puts out APB, BWC, GLL, HSC, RMB, XTE. Com port is 4, rate is 4800, no parity, 8 data bits, 1 stop bit.

Jedi: The display alternates between blank and the correct info. As it is blank also when there is no active waypoint, I think it just "forgets" the info between transmissions? I'll capture the output stream next time I'm at the boat and check for duplicate HSC's etc., but I don't think that is the problem.

Cheers.

[JRC Support]

Islander,

Next time you are on the boat, try and get a hypertermial capture of the data string. It is possible that there is some corruption with the data string on that sentence. If you could capture a few minutes worth of it and send it to me at marineservice"at"jrcamerica.com I would appreciate it.

[Islander]

Will do.

Cheers.

[Hampus]

My guess is that the PC puts out too many sentences. Try shutting them off and then turn them back on one at a time, using only the ones listed above.

[Islander]

Originally Posted by Hampus

My guess is that the PC puts out too many sentences. Try shutting them off and then turn them back on one at a time, using only the ones listed above.

I'll give this a go too - however, I think I need all these to get the full use out of my system (been a while since I configured it), so I would have to put them back in eventually.

Of course, there are also sentences from the instruments and GPS, so there is a fair bit of traffic!

Cheers.

[Islander]

Looks like Jedi was correct!

My GPS (Garmin GPSMap76) is putting out a blank waypoint:

$GPBWC,201410,,,,,,T,,M,,N,,D*78

while my PC is putting out the real one:

$ECBWC,201410,4737.277,N,12224.760,W,239.6,T,221.4 ,M,0.852,N,0001*00

I don't know why the Garmin is doing this? I could program my mux to drop it but then I wouldn't be able to navigate routes without having my PC in the loop - something I've particularly set up to avoid.

Eric - I'll send you the NMEA stream by email, But I figure I'll just have to live with it.

Thanks all.

Cheers