APRS

[Jay911]

There's definitely at least one thread somewhere on the forums with talk about a serial cable splitter to do exactly that (although I feel compelled to nitpick that it's NMEA ).

 

[KB7MIB]

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It's been a long day...lol

 

[AK9R]

You can split the serial NMEA line from a GPS and send the GPS data to different devices. The received GPS data line and the ground can be split. Do not split the line that sends data to the GPS because you really shouldn't have two sources. For example, I am currently splitting the received GPS data from a puck-type GPS receiver to both a Kenwood TM-D710 and a serial port on my computer.

You can also logically "split" the GPS data between multiple virtual COM ports inside a computer GPSgate Client or a similar program:

GpsGate Client - Products - GpsGate.com

 

[KB7MIB]

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Cool, thanks.

 

[K4APR]

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I wonder if there's a splitter available, or if you could build one yourself, to route one NEMA output to multiple devices?

We're actually in the final process of testing a single input, dual output serial splitter box. The problem with simply Y'ing the signal has to do with line loading. This can cause a significant voltage drop that will cause data errors or the devices will simply not see the data at all. Our box actually takes the serial data in and then routes it though IC's to output the signal at both ports in compliance with RS232 standards.

Also, on the single input port, we have provided a switchable +5VDC/Source Voltage jumper to route this voltage to pin 4 of the port. This will provide power to most of the "tracker" GPS receivers that require +5V on pin 4 to operate. We built this with APRS systems in mind. Plug a single display-less GPS into our splitter box, let the splitter power the GPS and then feed the two outputs to the systems that need NMEA. Great for setups using an APRS tracker AND a GPS enabled scanner, such as the Uniden BCT-996XT.

We expect to have this available for sale by the end of the month. It comes in a pre-milled ABS housing with mounting wings.

 

[Kingmobileaudio]

We're actually in the final process of testing a single input, dual output serial splitter box. The problem with simply Y'ing the signal has to do with line loading. This can cause a significant voltage drop that will cause data errors or the devices will simply not see the data at all. Our box actually takes the serial data in and then routes it though IC's to output the signal at both ports in compliance with RS232 standards.

Also, on the single input port, we have provided a switchable +5VDC/Source Voltage jumper to route this voltage to pin 4 of the port. This will provide power to most of the "tracker" GPS receivers that require +5V on pin 4 to operate. We built this with APRS systems in mind. Plug a single display-less GPS into our splitter box, let the splitter power the GPS and then feed the two outputs to the systems that need NMEA. Great for setups using an APRS tracker AND a GPS enabled scanner, such as the Uniden BCT-996XT.

We expect to have this available for sale by the end of the month. It comes in a pre-milled ABS housing with mounting wings.

Can't wait!


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